WO1994000104A1

WO1994000104A1 - Water resistant sunscreen protection and insect repellent compound

Info

Publication number: WO1994000104A1
Application number: PCT/US1993/006075
Authority: WO
Inventors: Ernest G. Stewart
Original assignee: Stewart Ernest G
Priority date: 1992-06-25
Filing date: 1993-06-23
Publication date: 1994-01-06
Also published as: AU4650893A

Abstract

An improved sunscreen protection and insect repellent combination product, the sunscreen component being about between 26 to 32 % by weight, the insect repellent component being about 11 to 14 % by weight, and the water filler being about between 49 to 59 % by weight.

Description

TITLE OF INVENTION

WATER RESISTANT SUNSCREEN PROTECTION & INSECT REPELLENT COMPOUND

BACKGROUND OF THE INVENTION

Field of the Invention

This invention relates to an improved compound for sunscreen protection and insect repellent compound, and in particular an improved water resistant combination sunscreen protection and insect repellent compound. The compound has a nongreasy composition with an approximate SPF factor of 10. Although the compound is water resistant, it is easily removed with soap and water and scrubbing.

Description of the Background Art

People who live and work and play in the outdoors have protected themselves from insects for years by using insect repellent compounds. Likewise, people who live and play and work outdoors have used suntan compounds to accelerate the darkening of the exposed skin. Only recently the knowledge of the adverse effects of the suns' ultra violet rays causing skin cancer has caused people to switch from suntan lotions to sunscreening lotions that provide protection from the sun. Those lotions are measured on a scale of increasing protection from 1 to 33. The scale is called the "SPF" or sun protection factor. The factor allows the consumer to determine the degree of sunburn that one is willing to accept for a given period of time in the direct rays of the suns' ultra violet rays.

Many products have become commercially available in the recent past that combine sunscreen protection lotions and insect repellent lotions in one package. These products, for many reasons, are not completely satisfactory. Among the reasons why they are not satisfactory are: First, the insect repellent compounds available are usually effective for short periods and require the person to continuously apply the lotion to maintain the desired degree of insect repellentancy on the skin. In many cases, as for example, in a duck blind this is very inconvenient because the person can not repeatedly apply the insect repellent lotion and maintain perfect stillness in the duck blind.

Second, many combination insect repellent and sunscreen projection compounds are easily removed with water. This is a particular problem in the summertime wherein the person sweats and the effectiveness of the insect repellent and sunscreen protection lotions are dramatically reduced due to the sweat removing the compound from the skin.

Third, most insect repellent compounds are oily and offensive to the olfactory systems of the wearer as well as the people around the wearer. Also, the heaviness in the material is an impediment to the function of the sweat glands and could cause discomfort to the wearer.

Fourth, the preparations commercially available today are not truly cosmetic in that they do not enhance the appearance and the texture of the skin.

Patent 1,471,344 issued to Loudin discloses a insect repellent composition which mixes equal parts of PHENYL SALICYLATE and camphor.

Patent 3,186,912 issued to Beamer discloses a cosmetic emulsion having sunscreening and insect repellent properties.

Patent 4,529,598 issued to Wong discloses an insect repellent compound which can be used as a sole active component or in an admixture with other compounds having a different utility. The invention further discloses the compound may be incorporated into a cream, lotion, powder or a suntan oil. Patent 2,170,185 issued to Carpenter discloses a suntan cream having methyl anthranilate which is a methyl esther of anthranilic acid.

Patent 4,434,154 issued to McShane discloses a tanning and screening compound that is highly stable after prolonged storage. The compound is useful even after prolonged storage for shielding human skin from the harmful ultra violet rays of the sun.

Patent 4,701,321 issued to Bernstein discloses a liquid detergent with a sunscreen agent selected from the aminobenzoic acid family the other components of the composition being a preservative, a non-ionic detergent, an amphoteric detergent, or a mixture thereof in a aqueous vehicle.

Patent 4,820,508 issued to Wortzman discloses a skin protective composition for topical application to protect human skin from infrared radiation. The invention contains titanium dioxide and mica or coated mica as its' principal active reagents.

Patent 4,756,905 issued to Melnik discloses a composition for repelling insects and camouflaging the human skin. The insect repellent, N or N-DIETHYL-M-TOLUAMIDE and a camouflage pigment is combined along with an emulsifier to allow a single application to serve both functions.

Patent 3,590,118 issued to Conrady, et al discloses a long lasting insect repellent film for skin application. The active chemical agents are dissolved in interpolymer resigns to provide a slow release system for the active chemical agents when spread and dried as a film on a human being. The coating can be applied by spraying or spreading and is easily removable with a soapy water solution.

None of these previous efforts, however, provide the benefits intended with the present invention. Additionally, prior techniques do not suggest, the present inventive combination of component elements as disclosed and claimed herein. The present invention achieves its intended purposes, objectives and advantages over the prior art devices through a new, useful and unobvious combination of component elements, which is simple to use, with the utilization of a minimum number of functioning ingredients, at a reasonable cost to manufacture, test, package and by employing only readily available materials.

Accordingly, it is an object of the invention to provide a combination sunscreen protection and insect repellent product that is resistant to breakdown by water, but is readily removed by soap and water and mild scrubbing.

It is a further object of the invention to provide a combination sunscreen protection and insect repellent product that is not greasy to the touch and generally nonoffensive to the wearer and those people around the wearer.

It is a still further object of the invention to provide a combination sunscreen protection and insect repellent product that does not impede the natural function of the wearers' sweat glands.

It is a further important object of the invention to provide a combination sunscreen protection and insect repellent product that enhances the appearance and feel of the wearers' skin.

It is a final important object of the invention to provide a combination sunscreen protection and insect repellent product that is long lasting and does not require frequent reapplication to maintain its effectiveness.

Although there have been many inventions related to sunscreen protection and insect repellent compounds, none of the inventions have become sufficiently effective, low cost and reliable enough to become commonly used. The present invention meets the requirements of long lasting effectiveness, low initial cost, water resistant, ease of application, pleasing to the senses, and minimal amount of instruction to successfully practice and use the invention.

The foregoing has outlined some of the more pertinent objects of the invention. These objects should be construed to be merely illustrative of some of the more prominent features and applications of the intended invention. Many other beneficial results can be obtained by applying the disclosed invention in a different manner or modifying the invention within the scope of the disclosure. Accordingly, other objects and a fuller understanding of the invention may be had by referring to the summary of the invention and the detailed description of the preferred embodiments in addition to the scope of the invention defined by the claims.

SUMMARY OF THE INVENTION

For the purpose of summarizing the invention, the invention may be incorporated into an improved sunscreen protection and insect repellent compound having a sunscreen constituent constituting from about between 26% to 32% by weight of the compound, an insect repellent constituent constituting about between 11% to 14% by weight of the compound and the balance being composed of a water based solvent comprising about between 49% to 59% by weight of the compound.

The compound is prepared by mixing the elements in Phase A to approximately about between 80 to 85 degrees centigrade in a vessel. Then Phase B, the water based solvent is heated to the same temperature in a second vessel and the solid material in Phase B is stirred into the heated distilled water. Thereupon the Phase B mixture is poured from the second vessel into the first vessel containing the mixed ingredients of Phase A. The first vessel is then cooled to about 40 degrees centigrade and the ingredients listed in Phase C are added to the phase A-B mixture and mixed with agitation and allowed to cool to room temperature. Then, the sunscreen protection and insect repellent product is ready for packaging.

The foregoing has outlined rather broadly the more pertinent and important features of the present invention in order that the detailed description of the invention that follows may be better understood so that the present contribution to the art can be more fully appreciated. Additional features of the invention will be described hereinafter which form the subject of the claims of the invention. It should be appreciated by those skilled in the art that the conception and the specific embodiments disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. It should also be realized by those skilled in the art that such equivalent structures do not depart from the spirit and scope of the invention as set forth in the appended claims. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention, Example 1, is prepared using the components in Phases A, B, and C respectively. The resultant compound that is produced in accordance with the present invention has the desired characteristics of being a nongreasy sunscreen protection and insect repellent with an approximate SPF of 10. The compound forms a light film on the skin which resists water, yet is readily removed by soap and water and scrubbing.

The compound is prepared according to the following practice. A suitably sized mixing vessel receives the ingredients in Phase A and is heated to approximately about between 80 to 85 degrees centigrade for about between 15 minutes to 60 minutes. Then Phase B, the distilled water is heated in another vessel to about between 80 to 85 degrees centigrade and the hydroethelcellulose is added to the distilled water in the second vessel and the Phase B mixture is agitated for about between 15 minutes to 60 minutes.

Next, the agitated water and hydroethelcellulose Phase B mixture in the second vessel is added to the first vessel while both mixtures are at about between 80 to 85 degrees centigrade. Then, the resultant Phase A-B mixture in the first vessel is allowed to cool to about between 40 to 45 degrees centigrade. Thereupon, the ingredients in Phase C are added to the first vessel and mixed with continuous agitation and allowed to cool to room temperature. Thereupon, the combination sunscreen protection and insect repellent product is ready for packaging. The above practice of the invention results in a composition as shown below in Example I, with the ingredients being representative of their constituent percentages by weight percent. EXAMPLE I

WEIGHT %

PHASE A

Diisopropyl Adipate 8.5

DEA-Cetyl Phosphate 2.0

Octyl Methoxycinnamate 7.5

Titanium Dioxide 3.0

Benzophenone-3 3.5

Dimethicone 1.0

GANEXO WP-660 3.0

Zinc Oxide 1.0

PHASE B

Distilled Water 54.0

Hydroxyethylcellulose 0.3

PHASE C

GERMABENO II 1.0

N,N-Diethyl-m-Tuluamide 12.0 Water, Fragrance, Color, Taste

Mask qs to 100.0

The mixing is done in a conventional manner and the ingredients in each phase are mixed in the sequence described herein. The choice of the particular material used dictates the mixing time and temperature change rates.

The composition of the sunscreen component comprises from about between 26% to 32% by weight of the composition. The composition of the insect repellent component comprises from about between 11% to 14% by weight of the composition. The composition of the water based filler comprises from about between 49% to 59% by weight of the composition. In addition, agents commonly used as cosmetic ingredients such as fragrance, color and taste are used in the composition of the present invention.

The present disclosure includes that contained in the appended claims, as well as that of the foregoing description. Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of structures and the combination of individual ingredients may be resorted to without departing from the spirit and scope of the invention.

Now that the invention has been described,

Claims

WHAT IS CLAIMED IS ;

CLAIM 1

A composition which functions as a sunscreen and insect repellent comprising in combination:

a first constituent functioning as a sunscreen and constituting from between about 26% and 32% by weight of the composition;

A second constituent functioning as an insect repellent constituting about between 11% to 14% of the composition; and

A third constituent functioning as a water based solvent constituting between about 49% and 59% by weight of the composition.

CLAIM 2

A method for formulating a composition which functions as a sunscreen protection and insect repellent product comprising the steps of:

Providing a first constituent which functions as a sunscreen, a second constituent which functions as an insect repellent and a third constituent which functions as a water based solvent;

Heating the first constituent to about between 80 and 85 degrees centigrade for about between 15 minutes to 60 minutes;

Heating the third constituent to about between 80 and 85 degrees centigrade for about between 15 minutes to 60 minutes;

Adding the third constituent to the first constituent at between about 80 and 85 degrees centigrade and agitating the resultant interim mixture;

Cooling the interim mixture of the first and third constituent to about 40 degrees centigrade; Adding the second constituent to the interim mixture of the first and third constituents;

Agitating the final mixture of the three constituents and cooling to room temperature.

CLAIM 3

The method as set forth in Claim 2 wherein the major component of the first constituent is diisopropyl adipate.

CLAIM 4

The method as set forth in Claim 2 wherein the principal component of the third constituent is distilled water.

CLAIM 5

The method as set forth in Claim 2 wherein the principal component of the second constituent is N,N-Diethyl-m-Toluamide.

CLAIM 6

A method of applying a compound to an exposed portion of a persons body for functioning as a sunscreen protectant and insect repellent comprising the steps of:

Providing a compound formed of a sunscreen protectant and an insect repellent and a solvent;

Agitating the compound by shaking until the compound is homogenous; and

Pouring the homogenous compound onto an applicator and then coating the exposed portions of the body with the homogenous compound.