GB1575201A - Method of lubricating or softening the skin - Google Patents

Description

(54) METHOD OF LUBRICATING OR SOFTENING THE SKIN (71) I, HOWARD LEE SCOTT, a citizen of the United States of America, of 1831 North 57th Street, Philadelphia, Pennsylvania 19131, United States of America, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement:- The present invention relates to the manufacture of cosmetic preparations, and more particularly to the preparation of cosmetic ointments, salves, creams, lotions and the like that contain artifical and durable dry lubricants that are inert to the human and animal skin tissue, nonagglomerative, and sized to fit smoothly within the crease lines of human and animal skin tissue.

This invention further relates to the preparation of cosmetic compositions employing as a base, or base adjuvant, micron size dry lubricants that have higher emolliency and smoother characteristics than those hitherto available.

There has been great demand for a durable satisfactory base for use in the manufacture of cosmeitc preparations acceptable for use on the skin. Heretofore, the most commonly used bases for this purpose have been lanolin, mink oil, petrolatum and the like. However, extensive uses of these substances as bases, or constituents of bases of ointments, salves and creams have shown that they are not satisfactory because of the marked tendency of these materials to leave greasy, sticky and sometimes odorous oil on the skin. Furthermore, they are not durable. In this respect, lanolin has not been entirely satisfactory because of its effect on those having allergic reactions thereto.

Petrolatum has not been found satisfactory in the cosmetics because it is relatively incompatible with aqueous materials which are generally incorporated in or used with cosmetic preparations. Furthermore, Detrolatum is not readily absorbed by the skin and hence is not particularly efficient in distributing a medicament which may be contained in the ointment, salve or lotion throughout the affected area on the skin.

It has now been found that cosmetic preparations such as cold creams, vanishing creams, rouge, lipsticks, protective creams, etc., containing a durable inert, dry lubricant, in a proportion of about 1 /n to about 50/n by weight, combines a high degree of skin protection with emolliency, are exceptionally stable, are substantially greaseless, and are very durable. As a result, ointments, salves, creams and the like, which are prepared from bases containing such lubricant have skin softening and coating characteristics which are substantially greater than those imparted by other animal or vegetable oils and fats. They are also, surprisingly, more stable to atmospheric conditions than compositions prepared from more conventional bases, are substantially odourless, and do not become rancid.

The present invention consists in a cosmetic composition for the skin including, as a lubricating agent 1 to 50% by weight of the homopolymer of tetrafluoroethylene, or the homopolymer of hexafluoropropylene, or the copolymer of tetrafluoroethylene and hexafluoropropylene, or chlorotrifluoroethylene polymers or mixtures thereof, said lubricating agent having a particle size in the range of 0.01 to 30 microns.

Lubricating agents of micron size, dry, powdery form are stable at atmospheric conditions, free of greasy or sticky effects, non-toxic and inert to the body skin and not susceptible to rancidity, and have been found to possess these characteristics to a substantially higher degree than the animal or vegetable fats and oil hitherto used for this purpose. Preferably the lubricating agent has a particle size in the range of 0.01 to 0.5 microns.

The homopolymer of tetrafluoroethylene, the homopolymer of hexafluoropropylene, and the copolymer of tetrafluoroethylene and hexafluoropropylene having the formula -(-CF2CF2-CF2CFCF3) are all perfluorocarbon resins which advantageously have a molecular weight in the range of 1,000,000 to 10,000,000, a viscosity greater than 10'0 poises at 3800 C., a specific gravity of 2.18 to 2.24, and a hefting point of over 600"F.

These resins will not lump or agglomerate either in solutions or on the skin, are generally inert to the actions of body chemistry, whereby they will neither react to body temperature nor break down due to the moisture of the body.

In order to compare the surface tension of products within the scope of the present invention with lubricants customarily used in cosmetics, a formulation was prepared wherein 3/ of the homopolymer of tetrafluoroethylene, having a particle size of 4--18 microns, was suspended in a thickening agent of carboxypolymethylene with which it was mixed at room temperature. The surface tension of the resultant gel was then compared with the following selected vegetable and animal oils, using a DuNuby Tensiometer at 260 C, with the following results: Petrolatum Semi-solid Lard Semi-solid Lanolin Semi-solid Corn Oil 36.8 Neatfoot Oil 35.9 Mink Oil 34.1 Sweet Almond Oil 33.8 Gelled homopolymer of tetrafluoro ethylene 27.5 The above data show that the perfluorocarbon resin has a lower surface tension than that of the animal oils and fats customarily employed in cosmetics.

Skin texture, feel, tone and touch were tested by placing an amount of gelled cosmetic preparation containing an effective amount of the perfluorocarbon resin and a similar preparation containing an equal amount of lanolin on separate skin areas. The preparation containing the resin was absorbed almost immediatley leaving behind a soft texture, and the skin was smooth to the touch. After 35 minutes, the lanolin that was placed on the skin was sticky, greasy, and spotty.

The following examples are illustrative of compositions containing effective amounts of powdered resin. In each example the particle size of the resin is about 0.05 to 0.5 micron. Although various of these examples include other lubricants such as lanolin, petrolatum or oil, much less of these other lubricants are used than would otherwise be necessary. From these examples it will be evident to those skilled in the art that a large number of cosmetic preparations could be prepared in a similar manner.

Example 1 Protective Cream: Parts Components by Weight Stearic acid 8.0 Petrolatum 6.0 Glycerin 3.0 Glyceryl monostearate 6.0 Triethanolamine 1.5 Water 56.0 Lanolin (anhydrous) 7.5 Talc 8.0 Copolymer of tetrafluoroethylene and hexafluoropropylene 2.0 Perfume qs 100/ Mix ingredients and warm to 85 to 950C.

When dissolved, stir until almost cool. Add perfume and stir well, or pass through homogenizer. The selected resins may be varied from 1/ to 15/ without materially affecting the consistency.

Example 2 Hand Lotion: Parts Components by Weight Propylene glycol 2.0 Petrolatum 3.0 Stearic acid 6.0 Triethanolamine 1.0 Glycerin 2.0 Homopolymer of hexafluoropropylene 2.0 Water 83.0 Perfume, qs 100/ loo Mix and warm all ingredients to 75 to 85"C. Stir the melted mixture until cool.

Add the perfume if desired. The selected resins may be varied from .5% to 12% in this preparation without affecting the consistency.

Example 3 Cold Cream: Parts Components by Weight Propylene glycol monostearate 4.0 Lanolin (anhydrous) 6.0 Mineral Oil 26.0 Triethanolamine 1.5 Homopolymer of tetrafluoroethylene 4.5 Water 58.0 Perfume, qs 100/ Warm all ingredients except the perfume in a stainless container at 75"C. Remove from heat and stir until mixture is almost at room temperature. Incorporate perfume and stir until cool. The selected resins may be varied from .5/ to 17% by replacing an equal quantity of mineral oil.

Example 4 Lipstick: Parts Components by Weight Beeswax 38.0 Vegetable Oil 32.0 Cocoa Butter 16.0 Lanolin (anhydrous) 5.0 Homopolymer of tetrafluoroethylene 4.0 Mineral Oil 5.0 Perfume, qs loo% The selected resins content may be varied from 1/ to 11/. To this base may be added the usual coloring agents. The material may be put through a colloid or roller mill and shaped into the ordinary lipstick form. Also the above preparation may contain perfume and if desired, antioxidants and preservative, such as methyl and propyl parasept, nordihydroguaiaretic acid, and the like in the amounts of 0.01/ to 15.0/.

Example 5 Ointment: Parts Components by Weight Water 75.0 Carboxypolymethylene .8 Sodium Hydroxide (10/ solution) 3.2 Homopolymer of hexafluoropropylene 16.0 100/ Carefully disperse the carboxypolymethylene in the water. After dispersion is complete add the sodium hydroxide with slow speed agitation to prevent excessive inclusion of air. Add the perfluorocarbon resin in the same manner.

Mix to homogeneity. A sample prepared in this fashion has a viscosity of 60,000 cps (Brookfield, 20 rpm) and a pH of 7.1.

Example 6 Brushless Shaving Cream: Parts Components by Weight Part A: Mineral Oil 95.7 Lanolin 4.2 Stearic acid 143.0 Part B: Water 669.0 Carboxypolymethylene 5.0 Homopolymer of tetrafluoroethylene 50.0 Triethanolamine 33.8 Perfume, qs 1000 Form B by carefully dispersing the carboxypolymethylene in the water then adding the triethanolamine. Heat both A.

and B. to 750C and add A. & B. with vigorous agitation. Mix this uniformily and then cool it rapidly to 300 C. Add perfume when the temperature is about 50"C. This cream has a pH of 7.0 and a viscosity of 35,000 cps (Brookfield, 20 rpm). This cream works well in giving a closer, smoother more comfortable shave.

Example 7 Cleansing Cream: Parts Components by Weight Part A: Beeswax 80.0 Light Mineral Oil 490.0 Paraffin 70.0 Cetyl Alcohol 10 Triethanolamine 10 Part B: Water 300.00 Chlorotrifluoroethylene resin 38 Carboxypolymethylene 2 Perfume, qs 1000 Prepare B by completely dispersing the carboxypolymethylene in the water and then blending in the chlorotrifluoroethylene resin. Heat both A. and B. to 800C. and add A. to B. with vigorous agitation. Once the mix has been blended to uniformity, cool it rapidly to 300 C. Perfume as desired when the blend reaches 50"C. A cleansing cream prepared as above has a pH of 8.1 and a viscosity of about 40,000 cps (Brookfield, 20 rpm). An exact viscosity determination of the system was difficult because of the thixotropic character of the composition.

Example 8 Insect Repellent Gel: Parts Components by Weight Metadelphene 600 Ethanol (SD-40) 100 Carboxypolymethylene 10 Homopolymer of tetrafluoroethylene 25 Triethanolamine 8 Distilled water 257 Disperse the carboxypolymethylene in the metadelphene. Add the triethanolamine. Add the perfluorocarbon resin. Slowly add the ethanol with mild agitation. The whole mass will slowly gel.

Example 9 Deodorant: Parts Components by Weight Water 90.0 Carboxypolymethylene 1 Homopolymer of tetrafluoroethylene 5.0 Sodium Hydroxide (10% solution) 1 Lanolin (anhydrous) 3 Disperse the carboxypolymethylene in the water and thoroughly mix. Add the resin and sodium hydroxide. Slowly mix until a cream is found.

Example 10 To a container one quarter full of the homopolymer of tetrafluoroethylene is added perfume oil. There is further added a fluorine related compound (CuF3). The container is now closed and the temperature is elevated to 500C for about 7 days. The perfume oil is thereby pressured into the perfluorocarbon resin. Cosmetics made in this manner have a longer lasting perfume odor than is found in ordinary cosmetics.

Other preparations that may be made to include perfluorocarbon resins or chlorotrifluoroethylene resin are soaps, vanishing creams, medicated creams, skin oils, medicated ointments and salves. For example, in making bar soap, the resin is added to the soap solution, in the percentage desired, prior to coagulation.

It will be evident from the above that creams, cosmetic ointments and salves prepared in accordance with the present invention have properties which make them far more suitable than similar products containing conventional ingredients. The term "cosmetic preparations" employed herein is intended to include ointment, salves, creams, rouges, liniments, lotions, brilliantines, bar soaps, and other cosmetic preparations, of the type herein disclosed.

The described cosmetic compositions combine a high degree of skin protection with emolliency, are exceptionally stable are substantially greaseless and are durable.

WHAT I CLAIM IS: 1. A cosmetic composition for the skin including, as a lubricating agent 1 to 50% by weight of the homopolymer of tetrafluoroethylene, or the homopolymer of hexafluoropropylene, or the copolymer of tetrafluoroethylene and hexa fluoropropylene, or chlorotrifluoroethylene polymers or mixtures thereof, said lubricating agent having a particle size in the range of 0.01 to 30 microns.

2. A composition as claimed in claim 1, wherein the particles size of said lubricating agent is in the range of 0.01 to 0.5 micron.

3. A composition as claimed in claim 1 or 2, wherein the homopolymer of tetrafluoroethylene, the homopolymer of hexafluoropropylene, and the copolymer of tetrafluoroethylene and hexafluoropropylene have a molecular weight in the range of 1,000,000 to 10,000,000, a viscosity greater than 10 poises at 3800C, a specific gravity of 2.18 to 2.24 and a melting point of about 600"F.

4. A process of making a cosmetic composition containing a cosmetically active ingredient which comprises admixing in the composition as lubricating agent 1 to 50/ by weight of the homopolymer of tetrafluoroethylene, or the homopolymer of hexafluoropropylene, or the copolymer of tetrafluoroethylene and hexafluoropropylene, chlorotrifluoroethylene polymers, or mixtures thereof, said lubricating agent having a particle size in the range of 0.01 to 30 microns.

5. A process as claimed in claim 4, wherein the particle size of said lubricating agent is in the range of 0.01 to 0.5 micron.

6. A cosmetic composition for the skin according to claim 1 and substantially as hereinbefore described.

7. A process of making a cosmetic

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. prepared as above has a pH of 8.1 and a viscosity of about 40,000 cps (Brookfield, 20 rpm). An exact viscosity determination of the system was difficult because of the thixotropic character of the composition. Example 8 Insect Repellent Gel: Parts Components by Weight Metadelphene 600 Ethanol (SD-40) 100 Carboxypolymethylene 10 Homopolymer of tetrafluoroethylene 25 Triethanolamine 8 Distilled water 257 Disperse the carboxypolymethylene in the metadelphene. Add the triethanolamine. Add the perfluorocarbon resin. Slowly add the ethanol with mild agitation. The whole mass will slowly gel. Example 9 Deodorant: Parts Components by Weight Water 90.0 Carboxypolymethylene 1 Homopolymer of tetrafluoroethylene 5.0 Sodium Hydroxide (10% solution) 1 Lanolin (anhydrous) 3 Disperse the carboxypolymethylene in the water and thoroughly mix. Add the resin and sodium hydroxide. Slowly mix until a cream is found. Example 10 To a container one quarter full of the homopolymer of tetrafluoroethylene is added perfume oil. There is further added a fluorine related compound (CuF3). The container is now closed and the temperature is elevated to 500C for about 7 days. The perfume oil is thereby pressured into the perfluorocarbon resin. Cosmetics made in this manner have a longer lasting perfume odor than is found in ordinary cosmetics. Other preparations that may be made to include perfluorocarbon resins or chlorotrifluoroethylene resin are soaps, vanishing creams, medicated creams, skin oils, medicated ointments and salves. For example, in making bar soap, the resin is added to the soap solution, in the percentage desired, prior to coagulation. It will be evident from the above that creams, cosmetic ointments and salves prepared in accordance with the present invention have properties which make them far more suitable than similar products containing conventional ingredients. The term "cosmetic preparations" employed herein is intended to include ointment, salves, creams, rouges, liniments, lotions, brilliantines, bar soaps, and other cosmetic preparations, of the type herein disclosed. The described cosmetic compositions combine a high degree of skin protection with emolliency, are exceptionally stable are substantially greaseless and are durable. WHAT I CLAIM IS:

1. A cosmetic composition for the skin including, as a lubricating agent 1 to 50% by weight of the homopolymer of tetrafluoroethylene, or the homopolymer of hexafluoropropylene, or the copolymer of tetrafluoroethylene and hexa fluoropropylene, or chlorotrifluoroethylene polymers or mixtures thereof, said lubricating agent having a particle size in the range of 0.01 to 30 microns.

2. A composition as claimed in claim 1, wherein the particles size of said lubricating agent is in the range of 0.01 to 0.5 micron.

3. A composition as claimed in claim 1 or 2, wherein the homopolymer of tetrafluoroethylene, the homopolymer of hexafluoropropylene, and the copolymer of tetrafluoroethylene and hexafluoropropylene have a molecular weight in the range of 1,000,000 to 10,000,000, a viscosity greater than 10 poises at 3800C, a specific gravity of 2.18 to 2.24 and a melting point of about 600"F.

4. A process of making a cosmetic composition containing a cosmetically active ingredient which comprises admixing in the composition as lubricating agent 1 to 50/ by weight of the homopolymer of tetrafluoroethylene, or the homopolymer of hexafluoropropylene, or the copolymer of tetrafluoroethylene and hexafluoropropylene, chlorotrifluoroethylene polymers, or mixtures thereof, said lubricating agent having a particle size in the range of 0.01 to 30 microns.

5. A process as claimed in claim 4, wherein the particle size of said lubricating agent is in the range of 0.01 to 0.5 micron.

6. A cosmetic composition for the skin according to claim 1 and substantially as hereinbefore described.

7. A process of making a cosmetic

composition according to claim 4 and substantially as hereinbefore described.

8. A cosmetic composition for the skin, substantially as hereinbefore described with reference to any one of Examples 1 to 10.