Personal care products containing high refractive index esters and methods of preparing the same
View Patent ↗The invention includes personal care compositions and methods of preparing these personal care compositions that include incorporation of a polyol polyester that is the reaction product of an aliphatic polyol that does not contain an ether group, and benzoic acid, wherein the resultant polyol polyester has a refractive index at 25° C. of greater than about 1.5. The aliphatic polyol may have two to three carbon atoms. Alternatively, the invention includes personal care compositions and methods of preparing personal care compositions including incorporating a polyol polyester into a personal care formulation. The polyol polyester is represented by formula (I): wherein R is an aliphatic alkyl group that does not contain an ether group and has a refractive index of greater than about 1.5 at 25° C. Also described are methods of preparing personal care compositions comprising a first phase and a second phase, wherein the second phase contains any of the polyol polyesters described above.
1. A method of preparing a highly refractive personal care composition, the method comprising:
(a) reacting an aliphatic polyol having two to three carbons atoms, which does not contain an ether group, and benzoic acid, to obtain a polyol polyester having a refractive index at 25° C. of greater than about 1.5; and
(b) incorporating the polyol polyester into a personal care composition, wherein the personal care composition is selected from the group consisting of a soap, a cleanser, a shampoo, a skin conditioner, a hair conditioner, a hair spray, a hair gel, a hair tonic, a hair mousse, a hair pomade, a hair lacquer, a skin lotion, a skin cream, a skin mousse, a skin ointment, a lipstick, a mascara, a foundation, an eye shadow, or a color-imparting cosmetic, wherein the personal care composition has shine and gloss properties based on the refractive index of the polyol polyester, wherein the polyol polyester has a viscosity of about 30 to about 200 centistokes at 25° C.
2. The method of claim 1 , wherein the polyol polyester has a viscosity of about 50 to about 70 centistokes.
3. The method of claim 1 , wherein the aliphatic polyol is selected from the group consisting of propylene glycol, ethylene glycol, and 1,3-propanediol.
4. The method of claim 1 , wherein the refractive index of the polyol polyester is about 1.54 to about 1.60 at 25° C.
5. The method of claim 1 , wherein the personal care composition further comprises one or more of a material selected from the group consisting of water, a pigment, an emollient, a therapeutic active ingredient, an aliphatic ester, an emulsifier, and a polymer.
6. A method of preparing a highly refractive personal care composition comprising incorporating a polyol polyester into the personal care composition, wherein the polyol polyester is represented by the formula (I):
wherein R is an aliphatic alkyl group that does not contain an ether group and has a refractive index of greater than about 1.5 at 25° C. and wherein the personal care composition is selected from the group consisting of a soap, a cleanser, a shampoo, a skin conditioner, a hair conditioner, a hair spray, a hair gel, a hair tonic, a hair mousse, a hair pomade, a hair lacquer, a skin lotion, a skin cream, a skin mousse, a skin ointment, a lipstick, a mascara, a foundation, an eye shadow, or a color-imparting cosmetic, wherein the personal care composition has shine and gloss properties based on the refractive index of the polyol polyester, wherein the polyol polyester has a viscosity of about 30 to about 70 centistokes at 25° C.
7. The method of claim 6 , wherein the personal care composition further comprises at least one of water, a pigment, an emollient, a therapeutic active ingredient, an aliphatic ester, an emulsifier, and a polymer.
8. The method of claim 6 , wherein the polyol polyester has a viscosity of about 50 to about 70 centistokes.
9. The method of claim 6 , wherein the refractive index of the polyol polyester is about 1.54 to about 1.60 at 25° C.
10. The method of claim 6 , wherein the step of incorporating further includes the step of adding the polyol polyester in an amount sufficient to adjust the refractive index of the personal care composition to about 1.4 at 25° C.