Silicone-based cosmetic products containing pigment

Claim 2

An anhydrous homogeneous pigmented cosmetic product comprising (a) 10 to 70 wt. % of dimethylpolysiloxane having the formula wherein both Y substituents are -CH 3 , or both are -OH; and wherein d is sufficient to impart to the dimethylpolysiloxane a viscosity of 0 . 65 to 10 centistokes at 25 0 C and (b) a coated pigment which comprises finely divided particles of inorganic pigment whose surface is chemically bonded to, and physically completely coated by, a polysiloxane which coating renders the particles hydrophobic; wherein said pigment is readily dispersible in component (a) without settling or segregating.

Claim 3

An anhydrous homogeneous pigmented cosmetic composition according to claim 1 wherein component (a) may also contain in a one phase mixture (1) organosilane having the formula RSi(CH 3 ) 3 wherein R is alkyl having 1 to 30 carbon atoms, or aryl; (2) organopolysiloxane having the formula wherein R 1 and R 3 are independently alkyl having 1 to 30 carbon atoms, or aryl; X is alkyl or alkyl-oxy and has 1 to 30 carbon atoms; R 4 is alkyl having 1 to 30 carbon atoms, or aryl; R 2 is alkyl having 2 to 30 carbon atoms, aryl, or -OSi(CH 3 ) 3 ; and n is 1 to 100, m is O to 100, and (n plus m) is 1 to 100; or (3) cyclomethicone having the formula provided that said composition contains at least 10wt. % of component (a).

Claim 4

The composition of claim 1 or 2 wherein said polysiloxane coating exhibits the structure wherein A 1 is an alkyl or alkenyl group having up to 30 carbon atoms; or the structure wherein p is 1 - 100; or the structure wherein there are enough of said chains bonded to each pigment particle to render the pigment hydrophobic.

Claim 5

The composition of claim 1, 2 or 3 wherein said pigment comprises up to 60 wt. % of the composition.

Claim 6

The composition of claims 2 to 4 further comprising from 4 to 20 wt. % of a cosmetically acceptable wax, provided that there is a sufficient amount of silicone component (2) that the product formed by melting said composition and then cooling it to 25°C is a single homogeneous phase.

Claim 7

The composition according to any of the preceding claims wherein at least one of R1, R 2 , R 3 and R 4 is alkyl.

Claim 8

The composition according to any of the preceding claims wherein the aryl group is phenyl or styryl.

Claim 9

The composition of any of the claims 2 to 7 wherein (a), (1), (2) and (3) comprise 20 to 50 wt. % of the total composition, and (a) comprises at least 20 wt. % of the total composition.

Claim 10

A composition according to claim 2 comprising by weight about 6 wt. % wax, about 6% polymethyloctadecyl siloxane, about 13% of cosmetically acceptable oil, about 25% of dimethylpolysiloxane (10 cs), and about 50% polysiloxane-coated pigment.

Claim 11

A composition according to claim 2 comprising by weight about 10% wax, about 15 % cosmetically acceptable oil, about 30 wt. % dimethylpolysiloxane (10 cs), and about 45% of a polysiloxane-coated pigment.

Claim 12

A composition according to claim 2 comprising by weight about 8% wax, about 7% cosmetically acceptable oil, about 30% cyclomethicone (D=5), about 5% pigment, about 40% polysiloxane-coated pigment, and about 10% dimethylpolysiloxane (10 cs).