CA1138877A - Acylphosphine oxide compound and their use - Google Patents
Acylphosphine oxide compound and their useInfo
- Publication number
- CA1138877A CA1138877A CA000331829A CA331829A CA1138877A CA 1138877 A CA1138877 A CA 1138877A CA 000331829 A CA000331829 A CA 000331829A CA 331829 A CA331829 A CA 331829A CA 1138877 A CA1138877 A CA 1138877A
- Authority
- CA
- Canada
- Prior art keywords
- carbon atoms
- alkyl
- radical
- substituted
- phenyl
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/38—Phosphonic acids RP(=O)(OH)2; Thiophosphonic acids, i.e. RP(=X)(XH)2 (X = S, Se)
- C07F9/40—Esters thereof
- C07F9/4003—Esters thereof the acid moiety containing a substituent or a structure which is considered as characteristic
- C07F9/4062—Esters of acids containing the structure -C(=X)-P(=X)(XR)2 or NC-P(=X)(XR)2, (X = O, S, Se)
- C07F9/4065—Esters of acids containing the structure -C(=X)-P(=X)(XR)2, (X = O, S, Se)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/30—Phosphinic acids R2P(=O)(OH); Thiophosphinic acids, i.e. R2P(=X)(XH) (X = S, Se)
- C07F9/32—Esters thereof
- C07F9/3205—Esters thereof the acid moiety containing a substituent or a structure which is considered as characteristic
- C07F9/3247—Esters of acids containing the structure -C(=X)-P(=X)(R)(XH) or NC-P(=X)(R)(XH), (X = O, S, Se)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/46—Phosphinous acids R2=P—OH; Thiophosphinous acids; Aminophosphines R2-P-NH2 including R2P(=O)H; derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/48—Phosphonous acids R—P(OH)2; Thiophosphonous acids including RHP(=O)(OH); Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic System
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/50—Organo-phosphines
- C07F9/53—Organo-phosphine oxides; Organo-phosphine thioxides
- C07F9/5337—Phosphine oxides or thioxides containing the structure -C(=X)-P(=X) or NC-P(=X) (X = O, S, Se)
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
- G03F7/029—Inorganic compounds; Onium compounds; Organic compounds having hetero atoms other than oxygen, nitrogen or sulfur
Abstract
ABSTRACT OF THE DISCLOSURE:
The invention is concerned with an acylphosphine oxide of the formula (I) (I) where R1 is straight-chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl, or naphthyl which are unsubstituted or substituted by halogen, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom; R2 has one of the meaning of R1, but R1 and R2 may be identical or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy, benzyloxy or vinyloxy, or R1 and R2 may be joined together to form an acylphosphonic acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an .alpha.-acyloxyethyl . .beta.-carboxyethyl radical, a cycloaliphatic radical of 3 to 12 carbon atoms, a vinyl, a methylvinyl, a naphthyl radical, a phenyl or naphthyl which are substituted by an alkyl of 1 to 8 carbon atoms or by thioalkoxy of 1 to 6 carbon atoms, a phenyl or naphthyl which are substituted by an alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom,or is the group:
whera R1 and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent radical of 2 to 6 carbon atoms, with the proviso that R1 and R2 do not simultaneously stand for alkyl of 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that R1 is not t-butyl or benzyl if R3 stands for t-butyl or n-butyl.
This invention also concerned the process for the preparation of these acylphosphine oxide compounds from acid halides of the general formula where X is chlorine or bromine, and a phosphine of the general formula
The invention is concerned with an acylphosphine oxide of the formula (I) (I) where R1 is straight-chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl, or naphthyl which are unsubstituted or substituted by halogen, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom; R2 has one of the meaning of R1, but R1 and R2 may be identical or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy, benzyloxy or vinyloxy, or R1 and R2 may be joined together to form an acylphosphonic acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an .alpha.-acyloxyethyl . .beta.-carboxyethyl radical, a cycloaliphatic radical of 3 to 12 carbon atoms, a vinyl, a methylvinyl, a naphthyl radical, a phenyl or naphthyl which are substituted by an alkyl of 1 to 8 carbon atoms or by thioalkoxy of 1 to 6 carbon atoms, a phenyl or naphthyl which are substituted by an alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom,or is the group:
whera R1 and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent radical of 2 to 6 carbon atoms, with the proviso that R1 and R2 do not simultaneously stand for alkyl of 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that R1 is not t-butyl or benzyl if R3 stands for t-butyl or n-butyl.
This invention also concerned the process for the preparation of these acylphosphine oxide compounds from acid halides of the general formula where X is chlorine or bromine, and a phosphine of the general formula
Description
The present invention relates -to novel acylphos-phine oxide compounds, to their preparation and to their use as photoinitiators in photopolymerizable compositions.
A plurality of pho-toinit:iators haviny various structures has been disclosed, for example benzyl dimethyl ketal (German Laid-Open Application DOS 2,26:L,383) benzoin ethers (German Laid-Open Application DOS 1,694,149) and thioxankhones (German Laid Open Application DOS 2~003~132)o However, photopolymerizable compositions hardened with such initiator syste~s e~hibit and undesirable yellowing, which m~kes the systems unusable on pale (or white) substrates or as a finish on true-to~color reproductions.
The present invention relates to an acylphosphi-ne oxide of the formula (X) Rl R
~ R3 (I) R
where Rlis skraight chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl or naphthyl which are unsubstituted or substituted by haioyen, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms,oraS-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom~ R2 has one of the meaning of R1, but Rl and R may be identica~ or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy, benzyloxy or vinyloxy, or Rl and R2 may be joined together to form an acyl~
phosphonic acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an ~-acyloxyethyl , ~-carboxyethyl radical, a cycloalip~atic radical of 3 to 12 carbon atoms, a vinyl, a methylvinyl, a naphthyl radical, a phenyl or naphthyl which are substituted by an alkyl of 1 to 18 carbon atoms or by thioalkoxy of 1 to 6 carbon atoms, a phenyl or naphthyl which are substitured by an alkoxy of 1 to 6 carbon atoms, or a S-containing or ~
3i~
N-co~t~i~ing fiYe~e~mbe~ed o~ s~x~embered -aromatic hetero- -cyciic radical having one heteroatom, or is the group~
. ~ , .
~) II p/
Il` R2 where Rl and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent ra~ical oE 2 to 6 carbon atoms, with the proviso that Rl and R2 do not simultaneously stand for alkyl o~ 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that Rl is not t-b~utyl or benzyl if R3 stands ~or t~butyl or n-butyl.
The present invention further relates to a process for the preparation of the acylphosphine oxide compounds according to the invention, and to thelr use as photoinitiators in photopo-lymerizable compositions.
The following details may be noted with regard to the general formula (I) of the acylphosphine oxide compounds accor-ding to the invention:
Rl may be straight-chain or branched alkyl of 1 to 6 carbon atoms, eg. methyl, ethyl, i-propyl, n~propyl, n-butyl, amyl or n-hexyl, cyclopentyl, cyclohexyl, aryl, eg. phenyl and naphthyl, halogen-substituted aryl, eg. monochlorophenyl and dichlorophenyl, alkyl -substituted phenyl,eg. me-thylphenyl, ethylphenyl, isopropylphenyl, tert.-butylphenyl and dimethyl-phenyl, alkoxy-substituted aryl, eg. methoxyphenyl. ethoxyphenyl and dimethoxyphenyl, or an S-con-talning or N-containing five-membered or six-membered ring, eg. thienyl or pyridyl, , , .
7~ , _ 3 - O.Z. 0050/0~3279 R2 may have one of ~he meanings of Rl 2nd may also be alkoxy of 1 to 6 carbon atoms, eg. methoxy, ethoxy, i-propoxy, butoxy or ethoxyethoxy, or aryloxy, eg. phenoxy, methylphenoxy or benzyloxy~ and Rl and R2 may be joined to forrn a ring, as, for example, in acylphosphonic acid o-phen~lene esters.
R3 may be for example ethyl, i-propyl, n-propyl~
n-butyl, i-butyl, tert.-butyl, i-amyl, n-hexyl, heptyl, n-octyl, ~-ethylhexyl, i-nonyl~ dimethylheptyl, lauryl, stearyl, cyclopropyl, cyclobutyl, cyclopentyl, l-methylcyclopentyl, cyclohexyl, l-methylcyclohexyl~ norbornadienyl, ad`amantyl, dimethyloctyl, dimethylnonyl, dimethyldecyl, methylphenyl~
dimethylphenyl, trimethylphenyl, tert.-butylphenyl, iso-propylphenyl, methoxyphenyl, dimethoxyphenyl, i-propoxy-phenyl, thiomethoxyphenyl, a- and ~-naphthyl, 'thienyl ~ pyri~yl, ~-acetoxyethyl or ~-carboxyethyl Rl, R2 and R3 may in addit~o-n contain carbon-carbon double bonds which allow the photoinitiator to be incorpora-ted' into the binder as copolymerized units.
Examples of the acylphosphine oxide compounds accor-ding to the invention are: methyl isobutyryl-methylphos-phinate, methyl isobutyryl-phenylphosphinate, methyl pivaloyl-phenylphosphinate, methyl 2-ethylhexanoyl-phenylphosphinate, isopropyl pivaloyl-phenylphosphinate, methyl p-toluyl-phenylphosphinate, methyl o-toluyl-phenylphosphinate, methyl
A plurality of pho-toinit:iators haviny various structures has been disclosed, for example benzyl dimethyl ketal (German Laid-Open Application DOS 2,26:L,383) benzoin ethers (German Laid-Open Application DOS 1,694,149) and thioxankhones (German Laid Open Application DOS 2~003~132)o However, photopolymerizable compositions hardened with such initiator syste~s e~hibit and undesirable yellowing, which m~kes the systems unusable on pale (or white) substrates or as a finish on true-to~color reproductions.
The present invention relates to an acylphosphi-ne oxide of the formula (X) Rl R
~ R3 (I) R
where Rlis skraight chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl or naphthyl which are unsubstituted or substituted by haioyen, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms,oraS-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom~ R2 has one of the meaning of R1, but Rl and R may be identica~ or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy, benzyloxy or vinyloxy, or Rl and R2 may be joined together to form an acyl~
phosphonic acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an ~-acyloxyethyl , ~-carboxyethyl radical, a cycloalip~atic radical of 3 to 12 carbon atoms, a vinyl, a methylvinyl, a naphthyl radical, a phenyl or naphthyl which are substituted by an alkyl of 1 to 18 carbon atoms or by thioalkoxy of 1 to 6 carbon atoms, a phenyl or naphthyl which are substitured by an alkoxy of 1 to 6 carbon atoms, or a S-containing or ~
3i~
N-co~t~i~ing fiYe~e~mbe~ed o~ s~x~embered -aromatic hetero- -cyciic radical having one heteroatom, or is the group~
. ~ , .
~) II p/
Il` R2 where Rl and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent ra~ical oE 2 to 6 carbon atoms, with the proviso that Rl and R2 do not simultaneously stand for alkyl o~ 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that Rl is not t-b~utyl or benzyl if R3 stands ~or t~butyl or n-butyl.
The present invention further relates to a process for the preparation of the acylphosphine oxide compounds according to the invention, and to thelr use as photoinitiators in photopo-lymerizable compositions.
The following details may be noted with regard to the general formula (I) of the acylphosphine oxide compounds accor-ding to the invention:
Rl may be straight-chain or branched alkyl of 1 to 6 carbon atoms, eg. methyl, ethyl, i-propyl, n~propyl, n-butyl, amyl or n-hexyl, cyclopentyl, cyclohexyl, aryl, eg. phenyl and naphthyl, halogen-substituted aryl, eg. monochlorophenyl and dichlorophenyl, alkyl -substituted phenyl,eg. me-thylphenyl, ethylphenyl, isopropylphenyl, tert.-butylphenyl and dimethyl-phenyl, alkoxy-substituted aryl, eg. methoxyphenyl. ethoxyphenyl and dimethoxyphenyl, or an S-con-talning or N-containing five-membered or six-membered ring, eg. thienyl or pyridyl, , , .
7~ , _ 3 - O.Z. 0050/0~3279 R2 may have one of ~he meanings of Rl 2nd may also be alkoxy of 1 to 6 carbon atoms, eg. methoxy, ethoxy, i-propoxy, butoxy or ethoxyethoxy, or aryloxy, eg. phenoxy, methylphenoxy or benzyloxy~ and Rl and R2 may be joined to forrn a ring, as, for example, in acylphosphonic acid o-phen~lene esters.
R3 may be for example ethyl, i-propyl, n-propyl~
n-butyl, i-butyl, tert.-butyl, i-amyl, n-hexyl, heptyl, n-octyl, ~-ethylhexyl, i-nonyl~ dimethylheptyl, lauryl, stearyl, cyclopropyl, cyclobutyl, cyclopentyl, l-methylcyclopentyl, cyclohexyl, l-methylcyclohexyl~ norbornadienyl, ad`amantyl, dimethyloctyl, dimethylnonyl, dimethyldecyl, methylphenyl~
dimethylphenyl, trimethylphenyl, tert.-butylphenyl, iso-propylphenyl, methoxyphenyl, dimethoxyphenyl, i-propoxy-phenyl, thiomethoxyphenyl, a- and ~-naphthyl, 'thienyl ~ pyri~yl, ~-acetoxyethyl or ~-carboxyethyl Rl, R2 and R3 may in addit~o-n contain carbon-carbon double bonds which allow the photoinitiator to be incorpora-ted' into the binder as copolymerized units.
Examples of the acylphosphine oxide compounds accor-ding to the invention are: methyl isobutyryl-methylphos-phinate, methyl isobutyryl-phenylphosphinate, methyl pivaloyl-phenylphosphinate, methyl 2-ethylhexanoyl-phenylphosphinate, isopropyl pivaloyl-phenylphosphinate, methyl p-toluyl-phenylphosphinate, methyl o-toluyl-phenylphosphinate, methyl
2,4-dimethylbenzoyl-phenylphosphinate, isopropyl p-tert.-butyl-phenylphosphinate, methyl pivaloyl-(4-methylphenyl)-1~L31~'7 - 4 - O.Z. 0050/033279 phosphinate~ vinyl pivaloyl-phenylphosphinate, methyl acryloyl-phenylphosphinate, isobutyryl-diphe~ylphosphine oxide, pivaloyl-diphenylphosphine oxide, 1 ~.ethyl-l-cyclo-hexanoyl-diphenylphosphine o~ide, 2-ethylhexanoyl-diphenyl-phosphine oxide~ p-toluyl-diphenylphosphine oxide, o-toluyl-diphenylphosphi~e oxide, p-tert.-butyldiphen~lphosphine oxide, ~-pyridylcarbonyl-diphenylphosphine oxide, acryloyl-diphenylphosphine oxide, benzoyl-diphenylenephosphine oxide, 2,2-dimethyl-heptanoyl-diphenylphosphine oxide, terephth-aloyl-bis-diphenylphosphine oxide and adipoyl-bis-diphenyl-phosphine oxide.
These compounds may be prepared by reacting an acid halide of the ~ormul~
O
R3_C_x where X is C1 or Br, with a phosphine of the formula , . . Rl' ~ P- O~
R
where R4 is straight-cha'in or branched alkyl of 1 to 6 carbon atoms, or cycloalkyl of 5 or 6 carbon atoms, The reaction can be carried out in a solvent, for example a hydrocarbon or hydrocarbon mixture, eg. petroleum ether, toluene, cyclohexane, an ether. or some other conven-tional inert organic solvent,' or even without a solvent, at from -30C to ~110C, preferably at from 10 to 70C. The ' ' product'can be directly crystallized out from the solvent, or remains after evaporation, or is distilled under reduced pressure.
These compounds may be prepared by reacting an acid halide of the ~ormul~
O
R3_C_x where X is C1 or Br, with a phosphine of the formula , . . Rl' ~ P- O~
R
where R4 is straight-cha'in or branched alkyl of 1 to 6 carbon atoms, or cycloalkyl of 5 or 6 carbon atoms, The reaction can be carried out in a solvent, for example a hydrocarbon or hydrocarbon mixture, eg. petroleum ether, toluene, cyclohexane, an ether. or some other conven-tional inert organic solvent,' or even without a solvent, at from -30C to ~110C, preferably at from 10 to 70C. The ' ' product'can be directly crystallized out from the solvent, or remains after evaporation, or is distilled under reduced pressure.
3~ '7 - 5 - o Z~ 00~0/0~3279 o The acid halide R3CX and the substituted phosphine RlR~PoR4 are obtained by processes known to those skilled i~
the art from the literature (for e~ample Weygand-Hilget~g, Organisch-Chemisc~e Experimentierkunst, 4th edition, pages 246-256, J.A. Barth-Verlag, Leipzig 1970 and K. Sasse in Houben-Weyl, volume 12~1, pages 208-209, G. Thieme-Verlag, Stuttgart). .
The process for the preparation of the compounds according to the invention can for example be represented by the ~ollowing equation: .. .... . . .
O
OC~3 . CH30 o ~ 3 ~ O + C~3Cl or ~ OC~3 +
~ CH
~ 0 ~ 3 n I CH3Cl O
Examples o~ suitable phosphines are methyldimethoxy-phosphine, butyldimethoxyphosphine, phenyldimethoxyphosphine, ~3~t~7 - 6 - o.z. 0050/0033279 tolyldimethoxyph~sphine~ phenyldiethoxyphosphine, tOlyldi_ ethoxyphosphine, phenyldiisopropoxyphosphine, tolyldiiso-propoxyphosphine~ phenyldibutoxyphosphine, tolyldibutoxy-phosphine and dimethylmethoxyphosphine~ dibutylmethox~phos-phine, dime-thylbutoxyphosphine~ diphen~lmethoxyphosphine, diphenylethoxyphosphine, diphenylpropoxyphosphine, diphenyl-isopropoxyphosphine, diphenylbutoxyphosphine an~ sim~lar starting materials which lead to the compounds according to the invention.
Suitable acid halides are the chlorides an~ bromides, of which the former are particularly pre~erred.
Specific examples o~ the compounds according to the inYenti~on (without this list implying an~ restriction) are:
~3~
7 o . z . 0050/03327y o~ _ o o ~ o ~ ".
.. , . ~
Ul ~ A
' J ~ o co ~ 8 o W U~ :r ~ O ~ O ~ O~ ~d O
-Il ~ . .
r-o ~o .
CS
~ .
bO p, O O
o ~ ~
O `f~=O
su ~ o ~ \f \~ ' o_<
O ~, I / \ \
- 8 - 0 . Z . 0050/C33279 cn ~ , ~O O ' O
~ ; ~ O ~
c~ cr~ C~ 0 ~ ~ '' ~, ~ 5 ~ U~ 'S 0 ~ I
~ ~ ; 5 f ~;
~ ~-- ~ O ;:r~ C ~ o .
C~
~ O ~ O ~ O ~ O
.~ ;
~ .
' p~ , ._ .
, æ . ~ 0~ ~ .
E~
S ~ .
\ ~ 0 O-~ S
S .C \~ C~ - O
0\~ ~ O~
~ t~ 0 = ~
S .-- _ .
~ ` ~
" _ g _ 0 . Z . 0050/033279 .
U~ 3 0 W ` rl Ll'~
''' '' ' O W
~
. ~
O
, . . ~ . . _ ~ O ~ O ~ o ~d O
O ~ O q~ C) ~ 0 ~1 ' ' .
O O ' O ~
O F:
a g ~ .
.
. I , .
,~ . .
r --r :~: ~ O = C~
C~ ~ = O
s q ~ o ~ P~,-O~ ~\ ~/o O ~ C.) o O=~ ~
O
,; .,~ , ?. ~3 '7~ ' - 10 O.Z. 0050/033279 ~ o o U~
o ~ ,., ,~, J r-- t-- 0 c;
~ ~o C~ ~o ~ ~o ,~ ~
d ~ ` U~ o o ~s .
.' ` ~ ~ .
o '' J
' ' s ~:
\ /
o\ ~
~ s s \ / o-~ o~
o ~-o ~ x~ /o ~ 3~
~ O.Z. 0050/033279 The compounds having the structure according to the invention exhibit very good reactivity when used as photo-initiators for photopolymerizable monomers possessing one or more carbon-carbon multiple bond~ and for mixtures of such monomers with one another and wlth conventional adjuvants.
The acy].phosphine oxide compounds according to the invention arè particularly suitable for use as photoinitiators in photopolymerizable compositions for surface coatings and finishes~ In respect of yellowing of the finishes and surface coatings thus ~btained they are far superior to conventional photoinitiators (for example benzil dimethyl-ketal).
Particularly preferred compounds are acyl-phenyl-phosphinic acid esters and acyl-diphenyl-phosphine oxides where acyl is derlved from a secondary-substituted or tertiary-substituted aliphatic carboxylic acidg eg. pivalic acid, l-methylcyclohexanecarboxylic acid, norbornene-carboxylic acid, ~,-dimethylalkanecarboxylic acids (Versatic(R)-acid of 9-to 13 carbon atoms~ or 2-ethylhexane-carboxylic acid, or from a substituted aromatic carboxylic acid, eg. p-methylbenzoic acid, o-methylbenzoic acid, 2,4-dimethylbenzoic acid, p-tert.-butylbenzoic acid, 2,4,5-tri-methylbenzoic acid, p-methoxybenzoic acid or p-thiomethyl--benzoic acid.
Suita~le photopolymerizable monomers are the con-ventional compounds and materials possessing polymerizable carbon-carbon double bonds which are activated by, for example, aryl, carbonyl, amino, amido, ester, - -carboxyl or cyanide groups, by halogen atoms or by .
1~3~87~
- 12 - O.Z. 0050/0~279 additional carbon-carbon double bonds and triple bonds.
Examples are vinyl ethers and vinyl esters, styrene, vin~l-toluene, acrylic acid and methacrylic acid and their esters with monohydric and polyhydric alcohols, their nitriles and their amides, maleic acid esters and ~umaric acid esters, N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylcarbazole and allyl esters, eg. diallyl phthalate.
Examples of suitable polymerizable compounds of higher molecular weight are unsaturated polyesters, pre-pared from a,~-unsaturated dicarboxylic acids, eg. maleic acid, fumaric acid or itaconic acid, which may or may not be mixed with saturated or aromat~c dicarboxylic acids, eg.
adipic acid, phthalic acid or terephthalic acid, by reaction with alkanediols, eg. ethylene glycol, propylene glycol, butanediol, neopentylglycol or oxyalkylated bisphenol A, epoxide-acrylates, prepared from acrylic acid or.methacrylic acid and aromatic or aliphatic diglycidyl ethers, urethane-acrylates (for example prepared from hydroxy alkylacrylates and polyisocyanates) and polyester-acrylates (for example prepared from hydroxyl-containing saturated polyesters and acrylic acid or methacrylic acid).
The photopolymerizable compounds, whose composition for any particular end use is familiar to those skilled in the art, may be mixed, in the conventional manner, with saturated and/or unsaturated polymers and with other adjuvants, for example thermal polymerization inhibitors, paraffin, pigments, dyes, peroxides, le~elling agents, fillers, glass fibers and stabilizers against thermal or photochemical degradation~
3~
- 13 ~ O.Z. 005~/033279 Such mixtures are known to those skilled in the art~
and the nature and amount o~ the additives depend on t`~e particular end use.
The compounds according to the in~ention are in general employed in a concentration of ~rom 0.01 to 15%, preferably from 0.1 to 5%, based on the photopolymerizable composition. They may also be combined with ac~elerators, which overcome the inhibiting effect of atmospherlc oxygen on the photopolymerization.
Examples of such accelerators or synergistic agents are secondary and/or tertiary amines, eg. methyldiethanol-amine, dimethylethanolamine, triethylamine, triethanolamine, ethyl p-dimethylaminobenzoate~ benzyldimethylamine, dimethyl-aminoethyl acrylate, N-phenylglycine, N-methyl-N-phenylgly-cine and analogous compounds known to those skilled in the art. Aliphatic and aromatic halides 3 eg. 2-chloro-methyl-naphthalene and l-chloro-2-chloromethyl-naphthalene, and compounds which form free radicals, eg~ peroxides and azo compounds, may also be used to accelerate the hardening.
- The radiation sources used to provide ~he light which initiates the polymerization of such mixtures are those which preferably emit light in the absorption region of the compounds according to the invention, ie. from 230 to 450 nm.
Low-pressurej medium-pressure and high-pressure mercury lamps, superactinic fluorescent tubes or pulsed lamps are particularly suitable. The said lamps may or ~ay not be doped~ - -In the Examples which follow, parts and percentages are by weight, unless stated otherwise. Parts by ~olume bear the same relation to parts as that of the liter to the 31~!7 - 14 - 0 . Z . 0050/033279 kilogram .
225 parts of diphenylchlorophosphine, dissolved in 220 parts by volume of petroleum ether, are added to a mix-ture of 1,350 parts by volume of petroleum ether (boiling range 40 - 70C), 180 parts by volume of N,N-diethylaniline and 67 parts by ~olume o~ methanol at 0C, whilst stirring The mixture is then stirred for a further 2 hours at room temperature After cooling the mixture to about +5C~
the amine hydrochloride which has separated out is filtered o~ and the ~iltrate is first distilled at 10 - 20 mm Hgt ~o remove all low-boiling material. The methoxy-diphenyl-phosphine is then fractionally distilled at 0.1 ~ 1 mm Hg, BoilJing point 120 - 124C/0.5 mm Hg. Yield: 17~ parts ~80~, based on diphenylchlorophosphine).
64.8 parts of methoxy-diphenylphosphine are added dropwise to 36.2 parts o~ pivaloyl chloride at 30 - 60~C, whilst stirring. A~ter completion of the addition, the reaction is allowed to continue ~or 30 minutes, the mixture ls then cooled to O - 10C, and the product which has pre-cipitated is recrystallized from cyclohexane.
Yield: 69.5 parts of pivaloyldiphenylphosphine oxide(81% of theory).
Melting point ilO - 112C. NMR (CDCi3, 1.33 (s)~ 704-8.0 ~m).
-Analysis C17~193P (286) calculated C 71.33 H 6.64 P 10.~4 found : C 70.0 H 6.5 P 11.0 108 parts of methoxydiphenylphosphine (prepared as - 15 - 0,Z, 0050/033279 describedin Ex~mplel), dissolvedin 200parts by volume oftoluene are added to77 parts o~ toluic acid chloride. The mixture is then heated for 60 minutes at 50C, after which it is cooled and the precipitate of toluyldiphenylphosphine oxide is filtered off and recrystalli~ed from cyclohexane.
Yield 117 parts (73% of theory), Melting point 105C.
NM~ (CDC13, ~): 2~35 (s), 7,2 - 8 (m) Analysis C20H1702P (3202 calculated: C 7S.~0 H 5.31 P 9.69 found : C 75.~ H 5.8 P 9.3 Using a method similar to that of Example 2~ 77 parts of 2-methyl-benzoic acid chloride and 108 parts of methoxydiphenylphosphine give 134 parts of 2-methylbenzoyl-diphenylphosphine oxide. Yield 84% of theory, melting point 107C.
NMP. (CDC13, o): 2.5 (s)~ 7.Z-8 (m), 8.8 (m).
Analysis C20H1702P (32oJcalculated C 75.0 H 5.31 P g.6g found : C 74.7 H 5.4 P 9.5 Using a method similar to that of Example 1 J 41.3 parts of p-tert.-butylbenzoic acid chloride are reacted with 45.4 parts of ~ethoxydiphenylphosphine, dissolved in 20 parts of toluene 3 in 90 minutes at 50C. After evaporating off the solvent on a rotary evaporator, the product is re-crystallized from cyclohexane.
Yield: 63 parts (83% of theory). Melting point - 136C.
NMR (CDC13, o): 1.3 (s)~ 7.3-8.1 (m?, 8.5 (d).
~L ~11 3 ~ r7 - 16 - O.Z. Qo50/03327g y C23H2302P (362) calculated: C 76.24 H 6 35 P 8 56 found : C 76.0 H 6.5 P 8.7 EXAI~PLE 5 Using a method similar to that o~ Example 2, 52 parts of terephthalic acid dichloride, dissolved in 200 parts of toluene, and 108 parts o~ methoxydiphenylphosp~line give 46 parts of terephthaloyl-bis-diphenylphosphine oxide (yield 35% of theory). Melting point 205C.
NMR (CDC13, 0~: 6.8-8.2 (m) y 3zH2404P2 (534) calculated: C 71.91 ~ 4 49 P 11 61 1~ found : C 71~8 H 4.8 P 11.0 Using a method similar to that of Example 2, 80 parts of l-methyl-l-cyclohexanecarboxylic acid chloride and 108 parts of methoxydiphenylphosphine, in the absence Or a solven~, givelOOparts of l methyl-cyclohexylcarbonyl-dipherlylphos-phine oxide as an oily crude product, which is purified by chromatography over silica gel (using toluene as the eluant), Yield: 42 parts (26yo o~ theory). Melting point 80C. .
NMR (CDC13, o): 14 (s); 1.1 - 1~6 (m); 2.1 - 2.4 ~mj;
7.3 - 8D0 (m), lysis C20H23o2p (326) calculated: C 73.62 H 7 06 P 9 51 fQund : C 7303 H 7.1 P 9.6 EX~MPLE 7 Using a method similar to that of Example 1, 88 parts of 2-methyl-2-ethylhexanoic acid chloridè and 108 parts of methoxydiphenylphosphine give 165 parts o~ 2-methyl-2-ethyl-B~7 - 17 - o.Z. 0050/033~79 hexanoyl-diphenylphosphine oxide as an oily crude product.
Column chromatography over silica gel (eluant: a 3:1 mixture of toluene and ether) gives the product as a pale yellowish oil. Yield 154 parts (90% of theory).
NMR (CDC13, ~): 1.2 (s), ~.5-2.2 (m), 7.3-~.1 (m) y ~21H2702P t342) calculated: C 73.68 H 7 89 P 9 o6 ~ound : C 73.9 H 8.1 P a.4 Using a method similar to that o~ Example 1, 43.2 parts of methoxydiphenylphosphine are added dropwise, at 50C~ to 35.3 parts of 2,2-dimethyl-heptanecarboxylic acid chloride (Versatic(R)-acid chloride). The mixture is ~tirred for 3 hours at 50~ then cooled to 15C and stirred into a slurry of 60 g of silica gel in 350 ml o:~ toluene;
stirring is then continued for one hour whilst cooling with ice. The mixture is then filtered and the solvent is dis-- tilled of~ under reduced pressure. Versatoyl-diphenyl-phosphine oxide remains as a ~iscous oil.
Yield: 62 parts (90% of theory).
NMR (CDC13, ~: 0.4 - 2.3 (m); 7.2 - 8.1 ~m) Analysis C~lH2702P ~342) calculated: C 73.68 H 7~89 P 9~06 found : C 73~6 H 8.1 P ,8.6 143 parts of phenyldichlorophosphine are added drop-wise in the course of one hour to a mixture of 600 parts by volume of petroleum ether, 263 parts of N,N-diethylaniline andJ120 parts of isopropanol at 0C. The mixture is then stirred for 1 hour at room temperature, worked up as described in Example 1 and distilled, Diisopropoxy-phenylphosphine B~7 - 18 - O.Z. 0050/~33279 distils at 68 - 72C/0O3 mm Hg. Yield: 126 parts (69% of theory), 158 parts o~ diisopropoxyphenylphosphine are added slowly to 84 parts of pivaloyl chloride at 50 - 60C, with thorough stirring. Stirring is then continued for two hours, after which the mixture is fractionated under reduced pressure. Isopropyl pivaloyl-phenylphosphinate distils at ~19 - 121C/0~5 mm.
Yield: 112 parts (6~,S of theory), NMR (CDC13, ~)1.25 ~s); 1.33 (t); 4.5 (~); 7,3 -8 (m).
Analysis: C14H2103P (268) calculated: C 62068 H 7.84 P 11.57 found : C 63.0 H 8.0 P 11~4 214 parts of phen~ldichlorophosphine àre added to a mixture of 1,0~00 parts by volume of toluene, 421 parts by volume o~ N,N-diethylaniline and 100 parts by volume o~
methanol at 0C, The mixture is then stirred for 1 hour at room temperature, the amine hydrochloride precipitate is filtered off and the filtrate is fractionated. Dimethoxy-phe~ylphosphine distils at 46 - 50C/0,2 - 0,3 mm Hg.
Yield: 190 parts (93% of theory), 110.5 parts of dimethoxyphenylphosphine are added dropwise at 15C to 78,7 parts of pivaloyl chloride~ The reaction mixture is then heated ~or 30 minutes at 50C, after which it is distilled, Methyl pivaloylphenylphosphinate passes o~er at 104 - 107C/0,3 mm Hg.
Yield: 101~3 parts (65% of theory), NMR (CDC13, ~): 1,3 (s), 3.75 ~d); 7.4 - 8 (m), ~3!~7~
- 19 - O.Z. 0050/033279 Analysis: C12H1703P (240): calculated: C 60.0 H 7.08 P 12.9 found : C 59.8 H 6.9 P 12.4 E~AMPLE 11 170 parts of dimethoxyphenylphosphine (Example 4) are added dropwise to 163 parts of 2-ethyl~exanoic acid chloride at 30Co The mixture is then stirred for 50 minutes at 50C, a~ter whlch it is fractionated under reduced pressure from an oil pump.
Methyl 2-ethyl-hexanoyl-phenylphosphinate passes over at 160-168C/1.2 mm.
Yield: 230 parts ~81% of theory). NMR (C~C13, o):
0.6-2 (m), 3.2 (a~ 3.8 ~d), 7~3-8 (m).
Analysis C15~223P (281) calcula~ed C 64.o6 H 7.~3 P 11.03 found : C 6308 H 8.1 P 11.0 170 parts of dimethoxyphenylphosphine are~added to 155 parts of 4~methylbenzoyl chloride, dissolved in 250 parts by volume of toluene, at 30C. The reaction is allowed to continue for 60 minutes, after which the mixture is cooled to 0C and the precipitate is filtered off.
After recrystallization from cyclohexane, methyl 4-methyl-benzoyl-phenylphosphinate melts at 99-101C.
Yield: 180 parts (65% of theory). NMR: 2.25 (s), 3.7 ~d), 7-8.1 (m).
y : C15H1503P ~74) calcula~èd C 65.69 H 5 47 P 11 31 found : C 65.7 H 5.6 P 11.0 ~ hiding pigmented finish is prepared from a mixture of 100 parts of the reaction product of bisp~enol A diglycidy ~L~3~ 7~
- 20 0.~. 0050/033279 ether and 2 moles of acrylic acid, 122 parts of butane-1,4-diol diacrylate, 6 parts of n-butanol and 122 parts of TiO2 pigment. Finishes of this type are known to those skilled in the art. 6.5 parts of 2-methylbenzoyl-diphenylphosphine oxide are added, as a photoinitiator, to this mixture. The finish formulated ~n this way is applied~ as a75 ~m thick layer, to a glass plate by means of a knife coater and is irradiated with a Hg high-pressurelamp (having a power of 80 W/cm of arc length). The dis-tance from lamp to film is 10 cm. The samples are drawn past the lamp, in an inert gas atmosphereg on a conveyor belt having a continuously variable speed adjustment.
At conveyor belt speeds of up to 6 m/min, scratch-resistant, fully hardened and completely white films are obtained.
Three parts of one of various photoinitiators are - added to a binder comprising 65 parts of a reaction product of bisphenol A diglycidyl ether with two equivalents of acrylic acid and 35 parts of butane-1,4-diol diacrylate.
An 80 ~m thick film of the mixture is spread on a glass plateby means of a knife coater,and isirradiated(Hghigh-pressure lamp, 8Q W/cm of arc length, distance 10 cm).
The irradiation time required to give a nail-hard, scratch-resistant surface is shown in terms of the maximum possible conveyor belt speed at which the samples can be drawn past the lamp and still give this result. For example, the following values were measured:
- 21 - o.~. 0050/033279 Hardening activity of the photoinitlators Initiator Maximum conveyor belt speed in m/min In air In inert In air; 3% o~
gas N-phenylgly--cine added to the mix-_ _ _ _ ~ _ _ ture_ Die~hyl pivaloylphosphonate ~ 10 Methyl pivaloylphenylphos~ 10 150 10 phinate Met.hyl toluyl-phenylphos- 10 70 25 phlnate Methyl 2-ethylhexanoyl- 40 phenylphosphinate ~oluyl-diphenylphosphine 7 25 oxide 2-Methylbenzoyl-diphenyl- 70 phosphine oxide Pivaloyl-diphenylphosphine 11 150 25 oxide 3% of N-phenylglycine are added to a finish,prepared as described in Example 14, which is then spread on glass plates, as in Example 14, and irradiated. The results are sbown in Table 2~
An unsaturated polyester is prepared by esterifying 431 parts of maleic anhydride and 325 parts of phthalic anhydride with 525 parts of 1,2-propylene glycol. After add~ng 0.01% of hydroquinone, a 66 per cent strength solution of the polyester in styrene is prepared. 1.5 parts of pivaloyl-dipherlylphosphine oxide are added to 97 parts of this unsaturated polyester resin.
..3~ ~7'~
- 22 - 0,Z, 00~0/033279-For the light-hardening experiments, 10 parts of a 1 per cent strength solution of paraffin (softening range 50-52 C) in styrene are added to 100 parts of this mixture, and the resin is applied to a glass plate, using a film spreader with 400 m clearance. After air-drying for about one minute, the films are exposed to fluorescent lamps (Philips TLA 05/40 W) mounted at a distance 0~ 4 cm.
After an exposure time of 4 minutes, the films have a K~nig pendulum.hardness of 76 s and can be rubbed down and buffed.
A binder prepared as described in Example 14 is mixed with three parts of one of the photoinitiators of Table 2, and a white.photographic paper is then coated with a 75 ~n ~ilm of the mixture and drawn, under inert gas, past a Hg high-- pressure lamp (power 80 W/cm of arc length) at a speed of 72 mlmin. The samples hardened in this way are nail-hard and very glossy. As is shown in Table 3, the compounds according to the invention far surpass in respect of yellowing the prior art compounds, of which benzil dimethyl-ketal and a benzil dimethylketal/benzophenone/methyl-diethanolamine mixture were taken as typical.
'~ 3 ~ ~'7 - 23 - O.Z. 0050/033279 Yellowing of photopolymerized finishes Initiator Concentration Yellowing measured in employed terms o~ the~)yellow-__ __ _ ness index Benzil dimethylketal 3% 9.20 ~enzil dimethylketal/
benzophenone/methyl- ) 6% 8.15 diethanolamine (2:1:3~ ) Piyaloyl-diphenylphos- 3% 3 3 phine oxide , 3 p-Toluyl-diphenylphos- 3% -3.72 phine oxide Methyl pivaloyl-phenyl- 3% -2 34 phosphinate *) Yellowness index according to ASTM D 1925-G7 measured with a Zeiss DMC 25 instrument.
To measure the hardening activity of the compounds according to the invention in pho~opolymerizable unsaturated polyester resins, the variation in temperature during irradiation was recorded. The following resins were pre-pared for these experiments.
Resin A: Melt condensation of maleic acid, o-phthalic acidJ ethylene glycol and 1,2-propylene glycol in the molar 'ratio of 1:2:2.4:0.85 gives an unsaturated polyester having an acid number of 50.
Resin B: Maleic acid, tetrahydroph,thalic acid and diethylene glycol in a molar ratio of 1:0.5:1.5 give an unsaturated polyester resin having an acid number of 46.
For use, a 65 per cent strength solution of each resin in styrene is prepared and s~abilized ~ith 100 ppm of hydroquinone.
lL~3~ 7 - 24 - O.Z. 0050/0}3279 10 g o~ such a resin are stabilized with 0.35% of the particular photoinitiator and then irradiated in a tin-plate dish (diameter 3.8 cm) embedded in rigid polyurethane foam to provide heat insulation. The radiation source used is a W battery (87 x 49 cm) of ten lamps arranged alongside one anotner (TUV 40 W/0.5, Phill:ips; the distance from lamp to sample is 10 cm). The temperature variation in the resin during hardening is recorded by means of a thermocouple connected to a pen recorder. The values measured are summarized in Table 4.
:L~31~ 7 - 2~i - O . Z . 0050/03327~
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the art from the literature (for e~ample Weygand-Hilget~g, Organisch-Chemisc~e Experimentierkunst, 4th edition, pages 246-256, J.A. Barth-Verlag, Leipzig 1970 and K. Sasse in Houben-Weyl, volume 12~1, pages 208-209, G. Thieme-Verlag, Stuttgart). .
The process for the preparation of the compounds according to the invention can for example be represented by the ~ollowing equation: .. .... . . .
O
OC~3 . CH30 o ~ 3 ~ O + C~3Cl or ~ OC~3 +
~ CH
~ 0 ~ 3 n I CH3Cl O
Examples o~ suitable phosphines are methyldimethoxy-phosphine, butyldimethoxyphosphine, phenyldimethoxyphosphine, ~3~t~7 - 6 - o.z. 0050/0033279 tolyldimethoxyph~sphine~ phenyldiethoxyphosphine, tOlyldi_ ethoxyphosphine, phenyldiisopropoxyphosphine, tolyldiiso-propoxyphosphine~ phenyldibutoxyphosphine, tolyldibutoxy-phosphine and dimethylmethoxyphosphine~ dibutylmethox~phos-phine, dime-thylbutoxyphosphine~ diphen~lmethoxyphosphine, diphenylethoxyphosphine, diphenylpropoxyphosphine, diphenyl-isopropoxyphosphine, diphenylbutoxyphosphine an~ sim~lar starting materials which lead to the compounds according to the invention.
Suitable acid halides are the chlorides an~ bromides, of which the former are particularly pre~erred.
Specific examples o~ the compounds according to the inYenti~on (without this list implying an~ restriction) are:
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~ O.Z. 0050/033279 The compounds having the structure according to the invention exhibit very good reactivity when used as photo-initiators for photopolymerizable monomers possessing one or more carbon-carbon multiple bond~ and for mixtures of such monomers with one another and wlth conventional adjuvants.
The acy].phosphine oxide compounds according to the invention arè particularly suitable for use as photoinitiators in photopolymerizable compositions for surface coatings and finishes~ In respect of yellowing of the finishes and surface coatings thus ~btained they are far superior to conventional photoinitiators (for example benzil dimethyl-ketal).
Particularly preferred compounds are acyl-phenyl-phosphinic acid esters and acyl-diphenyl-phosphine oxides where acyl is derlved from a secondary-substituted or tertiary-substituted aliphatic carboxylic acidg eg. pivalic acid, l-methylcyclohexanecarboxylic acid, norbornene-carboxylic acid, ~,-dimethylalkanecarboxylic acids (Versatic(R)-acid of 9-to 13 carbon atoms~ or 2-ethylhexane-carboxylic acid, or from a substituted aromatic carboxylic acid, eg. p-methylbenzoic acid, o-methylbenzoic acid, 2,4-dimethylbenzoic acid, p-tert.-butylbenzoic acid, 2,4,5-tri-methylbenzoic acid, p-methoxybenzoic acid or p-thiomethyl--benzoic acid.
Suita~le photopolymerizable monomers are the con-ventional compounds and materials possessing polymerizable carbon-carbon double bonds which are activated by, for example, aryl, carbonyl, amino, amido, ester, - -carboxyl or cyanide groups, by halogen atoms or by .
1~3~87~
- 12 - O.Z. 0050/0~279 additional carbon-carbon double bonds and triple bonds.
Examples are vinyl ethers and vinyl esters, styrene, vin~l-toluene, acrylic acid and methacrylic acid and their esters with monohydric and polyhydric alcohols, their nitriles and their amides, maleic acid esters and ~umaric acid esters, N-vinylpyrrolidone, N-vinylcaprolactam, N-vinylcarbazole and allyl esters, eg. diallyl phthalate.
Examples of suitable polymerizable compounds of higher molecular weight are unsaturated polyesters, pre-pared from a,~-unsaturated dicarboxylic acids, eg. maleic acid, fumaric acid or itaconic acid, which may or may not be mixed with saturated or aromat~c dicarboxylic acids, eg.
adipic acid, phthalic acid or terephthalic acid, by reaction with alkanediols, eg. ethylene glycol, propylene glycol, butanediol, neopentylglycol or oxyalkylated bisphenol A, epoxide-acrylates, prepared from acrylic acid or.methacrylic acid and aromatic or aliphatic diglycidyl ethers, urethane-acrylates (for example prepared from hydroxy alkylacrylates and polyisocyanates) and polyester-acrylates (for example prepared from hydroxyl-containing saturated polyesters and acrylic acid or methacrylic acid).
The photopolymerizable compounds, whose composition for any particular end use is familiar to those skilled in the art, may be mixed, in the conventional manner, with saturated and/or unsaturated polymers and with other adjuvants, for example thermal polymerization inhibitors, paraffin, pigments, dyes, peroxides, le~elling agents, fillers, glass fibers and stabilizers against thermal or photochemical degradation~
3~
- 13 ~ O.Z. 005~/033279 Such mixtures are known to those skilled in the art~
and the nature and amount o~ the additives depend on t`~e particular end use.
The compounds according to the in~ention are in general employed in a concentration of ~rom 0.01 to 15%, preferably from 0.1 to 5%, based on the photopolymerizable composition. They may also be combined with ac~elerators, which overcome the inhibiting effect of atmospherlc oxygen on the photopolymerization.
Examples of such accelerators or synergistic agents are secondary and/or tertiary amines, eg. methyldiethanol-amine, dimethylethanolamine, triethylamine, triethanolamine, ethyl p-dimethylaminobenzoate~ benzyldimethylamine, dimethyl-aminoethyl acrylate, N-phenylglycine, N-methyl-N-phenylgly-cine and analogous compounds known to those skilled in the art. Aliphatic and aromatic halides 3 eg. 2-chloro-methyl-naphthalene and l-chloro-2-chloromethyl-naphthalene, and compounds which form free radicals, eg~ peroxides and azo compounds, may also be used to accelerate the hardening.
- The radiation sources used to provide ~he light which initiates the polymerization of such mixtures are those which preferably emit light in the absorption region of the compounds according to the invention, ie. from 230 to 450 nm.
Low-pressurej medium-pressure and high-pressure mercury lamps, superactinic fluorescent tubes or pulsed lamps are particularly suitable. The said lamps may or ~ay not be doped~ - -In the Examples which follow, parts and percentages are by weight, unless stated otherwise. Parts by ~olume bear the same relation to parts as that of the liter to the 31~!7 - 14 - 0 . Z . 0050/033279 kilogram .
225 parts of diphenylchlorophosphine, dissolved in 220 parts by volume of petroleum ether, are added to a mix-ture of 1,350 parts by volume of petroleum ether (boiling range 40 - 70C), 180 parts by volume of N,N-diethylaniline and 67 parts by ~olume o~ methanol at 0C, whilst stirring The mixture is then stirred for a further 2 hours at room temperature After cooling the mixture to about +5C~
the amine hydrochloride which has separated out is filtered o~ and the ~iltrate is first distilled at 10 - 20 mm Hgt ~o remove all low-boiling material. The methoxy-diphenyl-phosphine is then fractionally distilled at 0.1 ~ 1 mm Hg, BoilJing point 120 - 124C/0.5 mm Hg. Yield: 17~ parts ~80~, based on diphenylchlorophosphine).
64.8 parts of methoxy-diphenylphosphine are added dropwise to 36.2 parts o~ pivaloyl chloride at 30 - 60~C, whilst stirring. A~ter completion of the addition, the reaction is allowed to continue ~or 30 minutes, the mixture ls then cooled to O - 10C, and the product which has pre-cipitated is recrystallized from cyclohexane.
Yield: 69.5 parts of pivaloyldiphenylphosphine oxide(81% of theory).
Melting point ilO - 112C. NMR (CDCi3, 1.33 (s)~ 704-8.0 ~m).
-Analysis C17~193P (286) calculated C 71.33 H 6.64 P 10.~4 found : C 70.0 H 6.5 P 11.0 108 parts of methoxydiphenylphosphine (prepared as - 15 - 0,Z, 0050/033279 describedin Ex~mplel), dissolvedin 200parts by volume oftoluene are added to77 parts o~ toluic acid chloride. The mixture is then heated for 60 minutes at 50C, after which it is cooled and the precipitate of toluyldiphenylphosphine oxide is filtered off and recrystalli~ed from cyclohexane.
Yield 117 parts (73% of theory), Melting point 105C.
NM~ (CDC13, ~): 2~35 (s), 7,2 - 8 (m) Analysis C20H1702P (3202 calculated: C 7S.~0 H 5.31 P 9.69 found : C 75.~ H 5.8 P 9.3 Using a method similar to that of Example 2~ 77 parts of 2-methyl-benzoic acid chloride and 108 parts of methoxydiphenylphosphine give 134 parts of 2-methylbenzoyl-diphenylphosphine oxide. Yield 84% of theory, melting point 107C.
NMP. (CDC13, o): 2.5 (s)~ 7.Z-8 (m), 8.8 (m).
Analysis C20H1702P (32oJcalculated C 75.0 H 5.31 P g.6g found : C 74.7 H 5.4 P 9.5 Using a method similar to that of Example 1 J 41.3 parts of p-tert.-butylbenzoic acid chloride are reacted with 45.4 parts of ~ethoxydiphenylphosphine, dissolved in 20 parts of toluene 3 in 90 minutes at 50C. After evaporating off the solvent on a rotary evaporator, the product is re-crystallized from cyclohexane.
Yield: 63 parts (83% of theory). Melting point - 136C.
NMR (CDC13, o): 1.3 (s)~ 7.3-8.1 (m?, 8.5 (d).
~L ~11 3 ~ r7 - 16 - O.Z. Qo50/03327g y C23H2302P (362) calculated: C 76.24 H 6 35 P 8 56 found : C 76.0 H 6.5 P 8.7 EXAI~PLE 5 Using a method similar to that o~ Example 2, 52 parts of terephthalic acid dichloride, dissolved in 200 parts of toluene, and 108 parts o~ methoxydiphenylphosp~line give 46 parts of terephthaloyl-bis-diphenylphosphine oxide (yield 35% of theory). Melting point 205C.
NMR (CDC13, 0~: 6.8-8.2 (m) y 3zH2404P2 (534) calculated: C 71.91 ~ 4 49 P 11 61 1~ found : C 71~8 H 4.8 P 11.0 Using a method similar to that of Example 2, 80 parts of l-methyl-l-cyclohexanecarboxylic acid chloride and 108 parts of methoxydiphenylphosphine, in the absence Or a solven~, givelOOparts of l methyl-cyclohexylcarbonyl-dipherlylphos-phine oxide as an oily crude product, which is purified by chromatography over silica gel (using toluene as the eluant), Yield: 42 parts (26yo o~ theory). Melting point 80C. .
NMR (CDC13, o): 14 (s); 1.1 - 1~6 (m); 2.1 - 2.4 ~mj;
7.3 - 8D0 (m), lysis C20H23o2p (326) calculated: C 73.62 H 7 06 P 9 51 fQund : C 7303 H 7.1 P 9.6 EX~MPLE 7 Using a method similar to that of Example 1, 88 parts of 2-methyl-2-ethylhexanoic acid chloridè and 108 parts of methoxydiphenylphosphine give 165 parts o~ 2-methyl-2-ethyl-B~7 - 17 - o.Z. 0050/033~79 hexanoyl-diphenylphosphine oxide as an oily crude product.
Column chromatography over silica gel (eluant: a 3:1 mixture of toluene and ether) gives the product as a pale yellowish oil. Yield 154 parts (90% of theory).
NMR (CDC13, ~): 1.2 (s), ~.5-2.2 (m), 7.3-~.1 (m) y ~21H2702P t342) calculated: C 73.68 H 7 89 P 9 o6 ~ound : C 73.9 H 8.1 P a.4 Using a method similar to that o~ Example 1, 43.2 parts of methoxydiphenylphosphine are added dropwise, at 50C~ to 35.3 parts of 2,2-dimethyl-heptanecarboxylic acid chloride (Versatic(R)-acid chloride). The mixture is ~tirred for 3 hours at 50~ then cooled to 15C and stirred into a slurry of 60 g of silica gel in 350 ml o:~ toluene;
stirring is then continued for one hour whilst cooling with ice. The mixture is then filtered and the solvent is dis-- tilled of~ under reduced pressure. Versatoyl-diphenyl-phosphine oxide remains as a ~iscous oil.
Yield: 62 parts (90% of theory).
NMR (CDC13, ~: 0.4 - 2.3 (m); 7.2 - 8.1 ~m) Analysis C~lH2702P ~342) calculated: C 73.68 H 7~89 P 9~06 found : C 73~6 H 8.1 P ,8.6 143 parts of phenyldichlorophosphine are added drop-wise in the course of one hour to a mixture of 600 parts by volume of petroleum ether, 263 parts of N,N-diethylaniline andJ120 parts of isopropanol at 0C. The mixture is then stirred for 1 hour at room temperature, worked up as described in Example 1 and distilled, Diisopropoxy-phenylphosphine B~7 - 18 - O.Z. 0050/~33279 distils at 68 - 72C/0O3 mm Hg. Yield: 126 parts (69% of theory), 158 parts o~ diisopropoxyphenylphosphine are added slowly to 84 parts of pivaloyl chloride at 50 - 60C, with thorough stirring. Stirring is then continued for two hours, after which the mixture is fractionated under reduced pressure. Isopropyl pivaloyl-phenylphosphinate distils at ~19 - 121C/0~5 mm.
Yield: 112 parts (6~,S of theory), NMR (CDC13, ~)1.25 ~s); 1.33 (t); 4.5 (~); 7,3 -8 (m).
Analysis: C14H2103P (268) calculated: C 62068 H 7.84 P 11.57 found : C 63.0 H 8.0 P 11~4 214 parts of phen~ldichlorophosphine àre added to a mixture of 1,0~00 parts by volume of toluene, 421 parts by volume o~ N,N-diethylaniline and 100 parts by volume o~
methanol at 0C, The mixture is then stirred for 1 hour at room temperature, the amine hydrochloride precipitate is filtered off and the filtrate is fractionated. Dimethoxy-phe~ylphosphine distils at 46 - 50C/0,2 - 0,3 mm Hg.
Yield: 190 parts (93% of theory), 110.5 parts of dimethoxyphenylphosphine are added dropwise at 15C to 78,7 parts of pivaloyl chloride~ The reaction mixture is then heated ~or 30 minutes at 50C, after which it is distilled, Methyl pivaloylphenylphosphinate passes o~er at 104 - 107C/0,3 mm Hg.
Yield: 101~3 parts (65% of theory), NMR (CDC13, ~): 1,3 (s), 3.75 ~d); 7.4 - 8 (m), ~3!~7~
- 19 - O.Z. 0050/033279 Analysis: C12H1703P (240): calculated: C 60.0 H 7.08 P 12.9 found : C 59.8 H 6.9 P 12.4 E~AMPLE 11 170 parts of dimethoxyphenylphosphine (Example 4) are added dropwise to 163 parts of 2-ethyl~exanoic acid chloride at 30Co The mixture is then stirred for 50 minutes at 50C, a~ter whlch it is fractionated under reduced pressure from an oil pump.
Methyl 2-ethyl-hexanoyl-phenylphosphinate passes over at 160-168C/1.2 mm.
Yield: 230 parts ~81% of theory). NMR (C~C13, o):
0.6-2 (m), 3.2 (a~ 3.8 ~d), 7~3-8 (m).
Analysis C15~223P (281) calcula~ed C 64.o6 H 7.~3 P 11.03 found : C 6308 H 8.1 P 11.0 170 parts of dimethoxyphenylphosphine are~added to 155 parts of 4~methylbenzoyl chloride, dissolved in 250 parts by volume of toluene, at 30C. The reaction is allowed to continue for 60 minutes, after which the mixture is cooled to 0C and the precipitate is filtered off.
After recrystallization from cyclohexane, methyl 4-methyl-benzoyl-phenylphosphinate melts at 99-101C.
Yield: 180 parts (65% of theory). NMR: 2.25 (s), 3.7 ~d), 7-8.1 (m).
y : C15H1503P ~74) calcula~èd C 65.69 H 5 47 P 11 31 found : C 65.7 H 5.6 P 11.0 ~ hiding pigmented finish is prepared from a mixture of 100 parts of the reaction product of bisp~enol A diglycidy ~L~3~ 7~
- 20 0.~. 0050/033279 ether and 2 moles of acrylic acid, 122 parts of butane-1,4-diol diacrylate, 6 parts of n-butanol and 122 parts of TiO2 pigment. Finishes of this type are known to those skilled in the art. 6.5 parts of 2-methylbenzoyl-diphenylphosphine oxide are added, as a photoinitiator, to this mixture. The finish formulated ~n this way is applied~ as a75 ~m thick layer, to a glass plate by means of a knife coater and is irradiated with a Hg high-pressurelamp (having a power of 80 W/cm of arc length). The dis-tance from lamp to film is 10 cm. The samples are drawn past the lamp, in an inert gas atmosphereg on a conveyor belt having a continuously variable speed adjustment.
At conveyor belt speeds of up to 6 m/min, scratch-resistant, fully hardened and completely white films are obtained.
Three parts of one of various photoinitiators are - added to a binder comprising 65 parts of a reaction product of bisphenol A diglycidyl ether with two equivalents of acrylic acid and 35 parts of butane-1,4-diol diacrylate.
An 80 ~m thick film of the mixture is spread on a glass plateby means of a knife coater,and isirradiated(Hghigh-pressure lamp, 8Q W/cm of arc length, distance 10 cm).
The irradiation time required to give a nail-hard, scratch-resistant surface is shown in terms of the maximum possible conveyor belt speed at which the samples can be drawn past the lamp and still give this result. For example, the following values were measured:
- 21 - o.~. 0050/033279 Hardening activity of the photoinitlators Initiator Maximum conveyor belt speed in m/min In air In inert In air; 3% o~
gas N-phenylgly--cine added to the mix-_ _ _ _ ~ _ _ ture_ Die~hyl pivaloylphosphonate ~ 10 Methyl pivaloylphenylphos~ 10 150 10 phinate Met.hyl toluyl-phenylphos- 10 70 25 phlnate Methyl 2-ethylhexanoyl- 40 phenylphosphinate ~oluyl-diphenylphosphine 7 25 oxide 2-Methylbenzoyl-diphenyl- 70 phosphine oxide Pivaloyl-diphenylphosphine 11 150 25 oxide 3% of N-phenylglycine are added to a finish,prepared as described in Example 14, which is then spread on glass plates, as in Example 14, and irradiated. The results are sbown in Table 2~
An unsaturated polyester is prepared by esterifying 431 parts of maleic anhydride and 325 parts of phthalic anhydride with 525 parts of 1,2-propylene glycol. After add~ng 0.01% of hydroquinone, a 66 per cent strength solution of the polyester in styrene is prepared. 1.5 parts of pivaloyl-dipherlylphosphine oxide are added to 97 parts of this unsaturated polyester resin.
..3~ ~7'~
- 22 - 0,Z, 00~0/033279-For the light-hardening experiments, 10 parts of a 1 per cent strength solution of paraffin (softening range 50-52 C) in styrene are added to 100 parts of this mixture, and the resin is applied to a glass plate, using a film spreader with 400 m clearance. After air-drying for about one minute, the films are exposed to fluorescent lamps (Philips TLA 05/40 W) mounted at a distance 0~ 4 cm.
After an exposure time of 4 minutes, the films have a K~nig pendulum.hardness of 76 s and can be rubbed down and buffed.
A binder prepared as described in Example 14 is mixed with three parts of one of the photoinitiators of Table 2, and a white.photographic paper is then coated with a 75 ~n ~ilm of the mixture and drawn, under inert gas, past a Hg high-- pressure lamp (power 80 W/cm of arc length) at a speed of 72 mlmin. The samples hardened in this way are nail-hard and very glossy. As is shown in Table 3, the compounds according to the invention far surpass in respect of yellowing the prior art compounds, of which benzil dimethyl-ketal and a benzil dimethylketal/benzophenone/methyl-diethanolamine mixture were taken as typical.
'~ 3 ~ ~'7 - 23 - O.Z. 0050/033279 Yellowing of photopolymerized finishes Initiator Concentration Yellowing measured in employed terms o~ the~)yellow-__ __ _ ness index Benzil dimethylketal 3% 9.20 ~enzil dimethylketal/
benzophenone/methyl- ) 6% 8.15 diethanolamine (2:1:3~ ) Piyaloyl-diphenylphos- 3% 3 3 phine oxide , 3 p-Toluyl-diphenylphos- 3% -3.72 phine oxide Methyl pivaloyl-phenyl- 3% -2 34 phosphinate *) Yellowness index according to ASTM D 1925-G7 measured with a Zeiss DMC 25 instrument.
To measure the hardening activity of the compounds according to the invention in pho~opolymerizable unsaturated polyester resins, the variation in temperature during irradiation was recorded. The following resins were pre-pared for these experiments.
Resin A: Melt condensation of maleic acid, o-phthalic acidJ ethylene glycol and 1,2-propylene glycol in the molar 'ratio of 1:2:2.4:0.85 gives an unsaturated polyester having an acid number of 50.
Resin B: Maleic acid, tetrahydroph,thalic acid and diethylene glycol in a molar ratio of 1:0.5:1.5 give an unsaturated polyester resin having an acid number of 46.
For use, a 65 per cent strength solution of each resin in styrene is prepared and s~abilized ~ith 100 ppm of hydroquinone.
lL~3~ 7 - 24 - O.Z. 0050/0}3279 10 g o~ such a resin are stabilized with 0.35% of the particular photoinitiator and then irradiated in a tin-plate dish (diameter 3.8 cm) embedded in rigid polyurethane foam to provide heat insulation. The radiation source used is a W battery (87 x 49 cm) of ten lamps arranged alongside one anotner (TUV 40 W/0.5, Phill:ips; the distance from lamp to sample is 10 cm). The temperature variation in the resin during hardening is recorded by means of a thermocouple connected to a pen recorder. The values measured are summarized in Table 4.
:L~31~ 7 - 2~i - O . Z . 0050/03327~
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Claims (8)
1. An acylphosphine oxide of the formula (I) (I) where R1 is straight-chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl or naphthyl which are un-substituted or substituted by halogen, alkyl of 1 to 6 carbon atoms or alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom; R2 has one of the meanings of R1, but R1 and R2 may be identical or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy, benzyloxy or vinyloxy, or R1 and R2 may be joined together to form an acylphosphine, acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an .alpha.-acyloxethyl , .beta.-carboxy-ethyl radical, a cycloaliphatic radical of 3 to 12 carbon atoms, a vinyl, a methylvinyl,anaphthyl radical, a phenyl or naphthyl which are substituted by an alkyl of 1 to 8 carbon atoms or by thioalkoxy of 1 to 6 carbon atoms, a phenyl or naphthyl which are substituted by an alkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six-membered aro-matic heterocyclic radical having one heteroatom or is the group;
where R1 and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent radical of 2 to 6 carbon atoms, with the proviso that R1 and R2 do not simultaneously stand for alkyl of 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that R1 is not t-butyl or benzyl if R3 stands for t-butyl or n-butyl.
where R1 and R2 have the above meanings and X is phenylene or an aliphatic or cycloaliphatic divalent radical of 2 to 6 carbon atoms, with the proviso that R1 and R2 do not simultaneously stand for alkyl of 1 to 6 carbon atoms if R3 is an alkoxy substituted phenyl and with the further proviso that R1 is not t-butyl or benzyl if R3 stands for t-butyl or n-butyl.
2. An acylphosphine oxide compound as claimed in claim 1, wherein R3 is a tertiary aliphatic radical.
3. An acylphosphine oxide compound as claimed in claim 1, wherein R3 is mono-, di- or tri-alkyl-substituted phenyl, each alkyl being of 1 to 8 carbon atoms.
4. A process for the preparation of an acylphosphi-ne oxide compound as claimed in claim 1, wherein an acid halide of the general formula where X is chlorine or bromine and R3 has the above meaning, is reacted with a phosphine of the general formula where R1 and R2 have the above meanings and R4 is stralght chain or branched alkyl of 1 to 6 carbon atoms or cycloalkyl of 5 or 6 carbon atoms, at from -30 to +110°C, in the presence or absen-ce of an inert organic solvent.
5. A photopolymerizable composition contalning as photoinitiator an acylphosphine oxide of formula (I) (I) wherein R1 is straight-chain or branched alkyl of 1 to 6 carbon atoms, cyclohexyl, cyclopentyl, phenyl or naphthyl which are unsubstituted or substituted by halogen, alkyl of 1 to 6 carbon atoms, alkoxy of 1 to 6 carbon atoms or a S-containing or N-containing five-membered or six-membered aromatic heterocyclic radical having one heteroatom R2 has one of the meanings of R1, but R1 and R2 may be identical or different, or is alkoxy of 1 to 6 carbon atoms, phenoxy, methylphenoxy or benzyloxy, or R1 and R2 may be joined together to form an acylphosphonic acid o-phenylene ester; and R3 is straight-chain or branched alkyl of 2 to 18 carbon atoms, an .alpha.-acyloxyethyl , .beta.-carboxyethyl radical, a cycloaliphatic radical of 3 to 12 carbon atoms, phenyl or naphthyl which are unsubstituted or substituted by alkyl of 1 to 8 carbon atoms, alkoxy of 1 to 6 carbon atoms or thioalkoxy of 1 to 6 carbon atoms, or a S-containing or N-containing five-membered or six membered aromatic heterocyclic radical having one heteroatom, or is the group:
where R1 and R2 have the above meanings and X is a phenylene or an aliphatic divalent radical of 2 to 6 carbon atoms, and one or more of the radicals R1, R2 and R3 may contain a carbon-carbon double bond.
where R1 and R2 have the above meanings and X is a phenylene or an aliphatic divalent radical of 2 to 6 carbon atoms, and one or more of the radicals R1, R2 and R3 may contain a carbon-carbon double bond.
6. A photolymerizable composition according to claim 5,wherein R3 is a tertiary aliphatic radical.
7. A photopolymerizable composition according to claim 5, wherein R3 is mono-, di- or tri-alkyl-substituted phenyl, each alkyl being of 1 to 8 carbon atoms.
8. A photomerizable composition according to claim 5, 6 or 7, containing an acylphosphine oxide of formula (I) in combination with a secondary and/or tertiary amine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782830927 DE2830927A1 (en) | 1978-07-14 | 1978-07-14 | ACYLPHOSPHINOXIDE COMPOUNDS AND THEIR USE |
| DEP2830927.5 | 1978-07-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1138877A true CA1138877A (en) | 1983-01-04 |
Family
ID=6044344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000331829A Expired CA1138877A (en) | 1978-07-14 | 1979-07-13 | Acylphosphine oxide compound and their use |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4324744A (en) |
| JP (1) | JPS5515471A (en) |
| CA (1) | CA1138877A (en) |
| DE (1) | DE2830927A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5504236A (en) * | 1992-09-12 | 1996-04-02 | Basf Aktiengesellschaft | Preparation of α-carbonylphosphine oxides |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5504236A (en) * | 1992-09-12 | 1996-04-02 | Basf Aktiengesellschaft | Preparation of α-carbonylphosphine oxides |
Also Published As
| Publication number | Publication date |
|---|---|
| US4324744A (en) | 1982-04-13 |
| JPS6340799B2 (en) | 1988-08-12 |
| DE2830927A1 (en) | 1980-01-31 |
| JPS5515471A (en) | 1980-02-02 |
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