MXPA01006551A - Wear resistant cosmetic compositions - Google Patents

Abstract

There is provided a cosmetic composition, preferably in the form of a lip gloss composition, that is smooth, glossy, and wear resistant. The composition has an oil or liquid ester and a gel, and optionally, one or more waxes, one or more pigments, and one or more emollients

Description

COSMETIC COMPOSITIONS RESISTANT TO WEAR BACKGROUND OF THE INVENTION Field of the Invention The present invention relates generally to cosmetic compositions. More particularly, the present invention relates to cosmetic compositions which are applied to the skin and to the lips, which offer increased ease of application and resistance to wear, for example, without extension in the form of feathers and without bleed. In addition, the present invention provides cosmetic compositions having characteristics of traditional gloss products, specifically high glare, uniform coverage or coating, and a feeling of lightness.

Description of the Prior Art Traditional lipsticks are made from a base of oil or fat that is hardened to a desired consistency with waxes of various types. The waxes serve to raise the melting point and improve the physical stability of the base. The color of the lipstick is ordinarily provided by insoluble pigments or lacquers, which are finely dispersed in the base. REF: 130420 In addition, a fluorescein dye derivative, such as tetrabromoflurescein, which dyes the lips, may be incorporated into the base. A lip gloss composition is a composition used for cosmetic and lip care purposes and specifically for coloring the lips, almost in the same way it is used as lipsticks. A lip gloss composition has a very high glow. In addition, the lip gloss composition is commonly semi-solid, and has a smooth, fluid consistency. These characteristics are preferred by consumers in many situations. However, lip gloss compositions are moved too quickly on the surface of the lips. Tmovement results in a very low wear resistance. For example, lip glosses will accumulate in the fine folds in the skin of the lips. and the skin that immediately surrounds the lips. Ttendency is called extension in the form of feathers, and is undesirable for consumers. Additionally, oils contained in a lip gloss sometimes cause the color to migrate beyond the outer perimeter of the lips, which results in a halo effect. Ttrend is called shifting, and it is undesirable for consumers.

Prior art examples of wear resistant cosmetic compositions include U.S. Patent No. 4,699,780 issued to Jennings et al, entitled Cosmetic Composition. The Jennings et al. Patent provides a composition comprising a resin, a polysiloxane, a polyolefin that is liquid at room temperature, and at least one curing agent. However, there is a current need for cosmetic compositions, which can be used, for example, as lip gloss compositions, which combine high gloss, fluidity and soft consistency with wear resistance and vibrant color.

BRIEF DESCRIPTION OF THE INVENTION It is an object of the present invention to provide a cosmetic composition, such as a lip gloss composition, which provides high gloss, fluidity, soft consistency, enduring radiance and lasting color. It is another object of the present invention to provide a cosmetic composition of tkind which provides vibrant colors of the lip gloss combined with resistance to the spread in the form of feathers and the sliding. Accordingly, a cosmetic composition is provided, preferably in the form of a lip gloss composition, which is semi-solid, glossy, durable and resistant to wear. The composition comprises a gel base, and optionally, one or more waxes, one or more dyes and one or more emollients.

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cosmetic composition, preferably a lip gloss composition, which is soft, glossy, wear resistant and stable. The cosmetic composition according to the present invention preferably comprises a gel base which is present in an amount of from about 75.0 percent to about 99.0 percent by weight (% by weight) of the total weight of the composition. More preferably, the base is present in an amount of about 80% by weight about 90% by weight and, more preferably, about 80% by weight. In addition, the cosmetic composition optionally comprises up to about 5.0% by weight of one or more waxes, up to about 15.0% by weight of one or more colorants, such as pigments and up to about 20.0% by weight of one or more emollients. The gel base includes a liquid ester or an oil, preferably non-polar, which can be either natural or synthetic, and a gelling substance. More preferably the base oil or ester is an aliphatic, branched chain, non-polar hydrocarbon homopolymer and, more preferably, a hydrogenated polyisobutene. The hydrogenated polyisobutene is generally adjusted to the formula: wherein x is an integer greater than 1. The hydrogenated polyisobutene gives emollient characteristics, elasticity and a high gloss to the cosmetic composition. The hydrogenated polyisobutene is preferably about 60% by weight to about 99% by weight of the gel base.

In addition, the gel base also includes one or more gelling substances in an amount of about 1.0% by weight to about 40% by weight of the total weight of the gel base. More preferably, the total amount of gelling substance is present in an amount of from about 1% by weight to about 20% by weight of the total weight of the gel base and, more preferably, about 10%. The gelling substance (s) are preferably one or more block copolymers. These copolymers are discussed in more detail in U.S. Patent No. 5,221,534, which is incorporated herein by reference. A preferred hydrogenated mixed block copolymer consists of (1) styrene (2-cyclohexa-3-diene) (2) ethylene; and (3) propylene or butylene monomers; or the derivatives thereof, which have the general structures: Styrene or a butylene derivative Ethylene Propylene Butylene where Ri to Rs are each independently a hydrogen or a hydrophobic alkyl chain. This hydrogenated mixed block copolymer is known as, for example, a styrene / ethylene / hydrogenated propylene triblock copolymer or a styrene / ethylene / butylene triblock copolymer. The "blocks" of the polymerized styrene monomers are mixed with the "blocks" of the polymerized ethylene and propylene or butylene monomers. Typically, this hydrogenated mixed block copolymer acts as a film former, as well as a gelling agent, plasticizer, emollient and / or humectant. The gelling substances promote improved occlusion of the skin and loss of water transepidermally (TEWL). Clinical studies with gelled mineral oil have shown that the hydration measured by the TEWL improves 53% although the gel base contains more than 90% mineral oil. It should be understood that one or more hydrogenated styrene / ethylene / propylene mixed block copolymers and / or styrene / ethylene / butylene mixed block copolymers could be used in the present compositions. A hydrogenated block copolymer, preferred for use in the present invention is available from Penreco Technology Group, Karns City, Pennsylvania and results in a clear gel base. Since cosmetic compositions, such as lip glosses, have a smooth and fluid consistency, the viscosity of the gel base should be around 50,000 centipoise (cps) at about 160,000 cps at 25 ° C when tested with a Spindle TC at 5 rotations or revolutions per minute (rpm) and color, based on ASTM D1500, should preferably have a value less than 0.5. The present invention also comprises an antioxidant in an amount of up to about 0.5% by weight of the total weight of the composition. More preferably, the antioxidant is present in an amount of up to about 0.4% by weight of the total weight of the composition. The antioxidant is preferably selected from the group consisting of ascorbyl palmitate, butylated hydroxytoluene (BHT), butylated hydroxyanisole.

(BHA), tocopheryl acetate, and ascorbic acid. More preferably, the antioxidant is BHT. BHT is a substituted toluene that conforms to the formula: A cosmetic composition according to the present invention can be made without any wax. However, if waxes are included in the present composition, the amount of wax should be minimized to maintain the clarity of the composition. By maintaining a clear and transparent composition, ingredients can be incorporated to improve the. visual effects (for example luster) in the composition. Similarly, a clear and colored composition will provide a truer color to the composition. Accordingly, it is preferred that the amount of wax is only up to about 5% by weight of the total weight of the composition. More preferably, one or more waxes will be present in an amount of from about 1% by weight to about 3% by weight of the total weight of the composition to maintain such clarity. However, more wax can be used if clarity is not a problem.

One or more of the waxes may be natural or synthetic waxes. Preferably, one or more microcrystalline waxes are used in the present invention. These microcrystalline waxes preferably have hydrocarbons of 8 to 50 carbon atoms and a melting point preferably greater than about 60 ° C (about 51 ° F). Other waxes that can be used in the present invention are candelilla, carnauba, ozoquerite, paraffin, polyethylene, beeswax, refined ozokerite, hydrogenated castor oil, Japanese wax, or mixtures thereof. In addition, a cosmetic composition of the present invention may include colorants and emollients.

In a . Preferred embodiment, the cosmetic composition may include up to about 15.0% by weight of one or more colorants. More preferably, the dyes will be present in an amount of from about 8 wt% to about 12 wt% and, more preferably, about 10 wt% of the total weight of the cosmetic composition. Such colorants include beads and pigments that are known in the art. For example, the pigments used in the present invention can be pigments of metal oxides, such as iron oxides and titanium oxides, FD &C dyes, D &C dyes and lacquers. A cosmetic composition according to the present invention may also contain one or more emollients different from the ingredients in the gel base in an amount of up to about 20.0% by weight of the total weight of the cosmetic composition. More preferably, the emollients will be present in an amount of from about 2% by weight to about 15% by weight of the total weight of the cosmetic composition and, more preferably, about 5% by weight. Emollients useful in the present invention include any known in the art, including, but not limited to, oils and esters, such as lanolin and petrolatum. In addition, a cosmetic composition according to the present invention may comprise other ingredients and additives known in the art, depending on the purpose for which the formulation is proposed. For example, a lip gloss, according to the present invention, may optionally include one or more vitamins, sunscreens, fillers and fragrances. The following is an example of a cosmetic composition according to the present invention.

Example 1: Lip Gloss Ingredient% by weight Hydrogenated polyisobutene / styrene-ethylene-hydrogenated propylene copolymer / BHT 80 Film former 4 Wax 3 Dyes 10 Preservative 0.1 Fragrance 0.3 Emollients c.s, This formula provides superior resistance to the feather-like and shifting, as well as lasting brightness and color, as a direct result of the thickening property achieved through the gel base. This thickening property also serves to drastically reduce the sedimentation rate of the dispersed pigment particles by physically restricting the movement of the particles. In addition, the polymer system, itself, can confer an additional stabilizing element to the composition further increasing the overall stability of the composition. Having described the present invention with particular reference to the preferred forms thereof, it will be obvious that various changes and modifications may be made herein without departing from the spirit and scope of the invention as defined in the appended claims. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (20)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property: 1. A cosmetic composition, characterized in that it comprises: A gel base having a liquid oil or ester and a gelling substance, wherein the base Gel has a viscosity of around 50,000 cps at around 160,000 cps at 25 ° C. The cosmetic composition according to claim 1, characterized in that the gel base is about 75.0% by weight to about 99.0% by weight of the total weight of the cosmetic composition. 3. The cosmetic composition according to claim 1, characterized in that the liquid oil or ester is from about 60.0% by weight to about 99.0% by weight of the total weight of the gel base. 4. The cosmetic composition according to claim 3, characterized in that the gelling substance is present in an amount of about 1.0% by weight of about 40.0% by weight of the total weight of the gel base. 5. The cosmetic composition according to claim 1, characterized in that the liquid oil or ester is a hydrogenated polymer. 6. The cosmetic composition according to claim 5, characterized in that the hydrogenated polymer is hydrogenated polyisobutene. The cosmetic composition according to claim 1, characterized in that the gelling substance is a hydrogenated mixed block copolymer comprising monomers selected from the group consisting of: styrene, ethylene, propylene, butylene, derivatives thereof and mixtures thereof. the same. 8. The cosmetic composition according to claim 1, characterized in that it also comprises an antioxidant. 9. The cosmetic composition according to claim 8, characterized in that the antioxidant is selected from the group consisting of: ascorbyl palmitate, BHT, BHA, tocopheryl acetate, ascorbic acid and mixtures thereof. 10. The cosmetic composition according to claim 8, characterized in that the antioxidant is present in an amount not greater than about 0.5% by weight of the total weight of the composition. 11. The cosmetic composition according to claim 1, characterized in that it also comprises one or more waxes. 12. The cosmetic composition according to claim 11, characterized in that one or more waxes are present in an amount of up to about 5.0% by weight. 13. The cosmetic composition according to claim 1, characterized in that it also comprises one or more colorants. The cosmetic composition according to claim 13, characterized in that one or more colorants are present in an amount of up to about 15.0% by weight of the total weight of the composition. 15. The cosmetic composition according to claim 1, characterized in that it also comprises one or more emollients. 16. The cosmetic composition according to claim 15, characterized in that one or more emollients are present in an amount of up to about 20.0% by weight of the total weight of the composition. 17. The cosmetic composition according to claim 1, characterized in that it also comprises one or more ingredients selected from the group consisting of: vitamins, sunscreens, fragrances, fillers and mixtures thereof. 18. The cosmetic composition having a gel base, characterized in that it comprises: a hydrogenated polymer; a hydrogenated gelling substance; and butylated hydroxytoluene, wherein the gel base has a viscosity of about 50,000 cps at about 160,000 cps at 25 ° C. 19. A method for providing improved resistance to the spread in the form of feathers and resistance to sliding to a lip gloss composition, characterized in that it comprises adding to the composition a gel base having a liquid oil or ester and a gelling substance, wherein The gel base has a viscosity of around 50,000 cps at around 160,000 cps at 25 ° C. 20. The method according to claim 19, characterized in that it further comprises providing the composition with a long-lasting color and a lasting shine.