Lipstick composition containing hydrophilic crosslinked silicone
AssigneeShin-Etsu Chemical Co., Ltd.
InventorKoji Sakuta
Life of this patent
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Abstract
Disclosed is a lipstick composition for molding into a lipstick capable of exhibiting excellent cosmetic finishing effect with remarkable sustainability and comfortable feeling of use. The most characteristic ingredient of the composition is a crosslinked hydrophilic organopolysiloxane insoluble in organic solvents obtained by the hydrosilation reaction between an organohydrogenpolysiloxane and an alkenyl-terminated polyoxyalkylene compound, which is combined with a liquid oily compound, solid or semisolid oily or waxy compound and pigments in specified weight proportions.
Claims16
A lipstick composition which comprises, as a uniform blend:
- (a) from 0.1 to 30% by weight of a crosslinked organopolysiloxane compound having at least one hydrophilic group in a molecule, and insoluble in an organic solvent;
- in which the crosslinked organopolysiloxane is a reaction product between
- (i) an organohydrogenpolysiloxane represented by the average unit formula (I)
- RaHbSiO(4-a-b)/2,
- in which R is an unsubstituted or halogen-substituted monovalent hydrocarbon group selected from the group consisting of alkyl groups having 1 to 8 carbon atoms, allyl group, aryl groups and aralkyl groups, the subscript a is a positive number in the range from 1.0 to 2.5 and the subscript b is a positive number in the range from 0.001 to 1.0 with the proviso that a+b is a positive number in the range from 1.5 to 2.8, and
- (ii) an alkylenyl-terminated polyoxyalkylene compound represented by the formula (II)
- CmH2m-1O(C2H4O)x(C3H6O)yCmH2m-1,
- in which the subscript x is a positive integer in the range from 2 to 200, the subscript y is 0 or a positive integer not exceeding 200 with the proviso that x+y is a positive integer in the range from 3 to 200 and the subscript m is a positive integer in the range from 2 to 6,
- (b) from 10 to 90% by weight of an oily compound having a viscosity in the range from 1 to 1000 mm2/second at 25° C. selected from the group consisting of liquid hydrocarbon compounds, esters, higher fatty acids, higher alcohols and liquid silicone compounds;
- (c) from 5 to 50% by weight of an oil or fat which is solid or semisolid at room temperature;
- and
- (d) from 1 to 50% by weight of a pigment, the balance to 100%, if any, being additives permissible as an ingredient of a cosmetic preparation.
Dependencies are inferred from the claim text.