Cosmetic compositions
AssigneeThe Procter & Gamble Company
InventorsMichael Lee Vatter, David Andrew Jakubovic
Life of this patent
Estimating the term…
Abstract
Disclosed are cosmetic compositions, including lipsticks, comprising from 0.01% to about 50%, by weight, of cylindrical crystalline vitamin B3 particles having a particle size distribution such that at least about 70% of the crystalline particles have a height to width ratio greater than 1; from about 1% to about 90%, by weight, of an emollient component; from about 1% to about 90%, by weight, of a solidifying agent; and from about 1% to about 90%, on an anhydrous basis, of a color. The compositions provide improved skin feel of crystalline vitamin B3 compounds when applied to skin.
Claims19
A cosmetic composition containing cylindrical crystalline vitamin B3 compounds, and which provides improved skin feel, said composition comprising:
- a) from about 0.01% about 50%, by weight, of cylindrical crystalline vitamin B3 compound particles having a particle size distribution such that at least about 70% of the crystalline particles, present in said composition, have a height to width ratio greater than 1;
- and
- b) from about 1% to about 90%, by weight, of an emollient component;
- c) from about 1% to about 90%, by weight, of a solidifying agent;
- and
- d) from about 1% to about 90%, on an anhydrous basis, of a color;
- wherein the composition is substantially free of polar solvents and wherein the vitamin B3 compound is selected from the group consisting of tocopherol nicotinate, niacinamide, and mixtures thereof.
A cosmetic composition which provides improved skin feel, said composition comprising:
- a) from about 0.01% to about 50%, by weight, of cylindrical crystalline niacinamide particles having a particle size distribution such that at least about 70% of the crystalline particles, present in said composition, have a height to width ratio greater than 1;
- and
- b) from about 1% to about 90%, by weight, of an emollient component;
- wherein the cylindrical crystalline niacinamide is dispersed in the emollient.
A method of preparing anhydrous cosmetic compositions, comprising the steps of:
- a.) dissolving and recrystallizing synthesized vitamin B3 compounds selected from the group consisting of tocopherol nicotinate, niacinamide, and mixtures thereof such that cylindrical vitamin B3 crystals are formed;
- b.) filtering and drying the crystals from step a.);
- c.) milling the crystals of step b.) to form crystalline particles having a particle size distribution such that at least about 70% of the crystalline particles have a height to weight ratio at least 1;
- d.) incorporating the crystals of step c.) into a deriatologically acceptable, anhydrous cosmetic carrier.
A method of preparing anhydrous cosmetic compositions, comprising the steps of:
- a) a vitamin B3 compound selected from the group consisting of tocopherol nicotinate, niacinamine, and mixtures thereof with a cosmetic base comprising:
- i.) from about 1% to about 90%, by weight, of an emollient component comprising from 5% to about 90%, by weight, of an oil liquid at ambient temperature;
- ii.) from about 5% to about 50%, by weight, of a solidifying agent;
- iii.) sufficient polar solvent to solubilize at least about 1% of the vitamin B3 compound;
- b) heating with mixing the compositions of step a.) until a homogenous liquid is formed;
- and
- c) cooling the mixture of step b) such that the vitamin B3 compound recrystallizes into cylindrical crystalline particles having a particle size distribution such that at least 70% of the particles have a height to width ratio greater than 1.
Dependencies are inferred from the claim text.