Acidic hair dye compositions which comprise acid dyes, benzyl alchol, and polysiloxanes

Claim 2

An acid dye composition for hair comprising: (A) 1% to 10% by weight of benzyl alcohol, (B) 0.001% to 0.1% by weight of an acid dye, and (C) 0.01% to 5.0% by weight of at least one polysiloxane, all based upon the total amount of the composition, the ratio (A)/(B) being 15 to 1250 and the pH of the composition being 1.5 to 4.5.

Claim 3

An acid dye composition for hair as according to claim 1 which further comprises 5% by weight or more of at least one compound selected from the group consisting of levulinic acid, N-methylpyrolidone and tetrahydrofurfuryl alcohol.

Claim 4

An acid dye composition for hair according to claim 1 which further comprises 5% by weight or more of at least one polyol.

Claim 5

An acid dye composition for hair according to claim 3, wherein said polysiloxane is at least one compound selected from the group consisting of (A) Dimethylpolysiloxane (CH.sub.3).sub.3 SiO[(CH.sub.3).sub.2 SiO].sub.n Si(CH.sub.3).sub.3( 1) wherein, in the formula (1), n is an integer from 3-650, (B) Methylphenylpolysiloxane ##STR8## wherein, in the formula (2), n is an integer from 1-500, and in the formula (3), the sum of m and n is an integer of 1-500, (C) Polyether denatured polysiloxane ##STR9## wherein, in the formula (4), R represents an alkyl group having 1-12 carbon atoms, an alkoxy group having 1-6 carbon atoms or a hydroxyl group, n represents an integer from 1-100, m represents an integer from 1-20, k represents an integer from 0-50, and l represents an integer from 0-50, (D) Amino modified polysiloxane R(CH.sub.3).sub.2 SiO[(CH.sub.3).sub.2 SiO].sub.n -[(CH.sub.3)(CH.sub.2 CH.sub.2 CH.sub.2 NHCH.sub.2 CH.sub.2 NH.sub.2)SiO].sub.m Si(CH.sub.3)R(5) R(CH.sub.3).sub.2 SiO[(CH.sub.3).sub.2 SiO].sub.n -[(CH.sub.3)(CH.sub.2 CH.sub.2 CH.sub.2 NH.sub.2)SiO].sub.m Si(CH.sub.3)R (6) wherein, in the formulae (5) and (6), R represents a methyl group or methoxy group, n represents an integer of 1-500, and m represents an integer of 1-50, (E) Epoxy modified polysiloxane ##STR10## wherein in the formula (7), R represents an alkylene group having 1-3 carbon atoms, n represents an integer of 1-500 and m represents an integer of 1-50, (F) Fluorine modified polysiloxane ##STR11## wherein, in the formula (8), n represents an integer from 1-400, (G) Alcohol modified polysiloxane ##STR12## wherein, in the formulae (9) and (10), R is absent or represents an alkylene group having 1-4 carbon atoms, and n and m represent integers of 1-500 and 1-200, respectively, (H) Alkyl modified polysiloxane ##STR13## wherein, in the formulae (11) and (12), R 1 represents an alkyl group having 2-18 carbon atoms, R 2 is absent or represents an alkylene group having 1-4 carbons, R 3 represents an alkyl group having 10-16 carbons, and n and m are integers of 1-500 and 1-200, respectively, and (I) High polymer silicone ##STR14## wherein, in the formula (13), R 1 each individually represents a methyl group or a phenyl group, R 2 represents a methyl group or hydroxyl group, and n represents an integer from 3,000-20,000.

Claim 6

An acid dye composition for hair according to claim 3, wherein the polyol comprises at least one member selected from the group consisting of methyl ethyl cellosolve, methyl ethyl carbitol, 1,3-butylene glycol, dipropylene glycol and propylene glycol.