Method of Protecting Dyed Hair Color from Fading or Wash-Out
A method of protecting dyed hair color from fading or wash-out during exposure to air and/or shampooing is described. In accordance with one aspect the method includes treating dyed hair with a composition containing (i) a hydrophobically modified quaternary polymer, (ii) a hydrophobically modified polymer plus a cationic surfactant, (iii) a polymer containing diethylaminopropyl methacrylamide (DMAPMA), dimethylaminoethyl methacrylamide (DMAEMA) or diethylaminoethyl methacrylamide (DEAEMA) or (iv) a combination thereof.
1 . A method of protecting dyed hair color from fading or wash-out during exposure to air and/or shampooing which comprises treating said dyed hair with a composition which comprises a polymer selected from the group consisting of:
a. hydrophobically modified quaternary polymers wherein the polymer contains an alkyl moiety with more than 3 carbon atoms;
b. hydrophobically modified polymers plus a cationic surfactant wherein the polymer contains an alkyl moiety with at least 3 carbon atoms;
c. polymers containing diethylaminopropyl methacrylamide (DMAPMA) or dimethylaminoethyl methacrylamide (DMAEMA) or diethylaminoethyl methacrylamide (DEAEMA); and
d. combinations thereof.
2 . A method according to claim 1 wherein said polymer is a cationic polymer.
3 . A method according to claim 1 wherein said polymer is a quaternized polymer wherein the alkyl moiety is either attached to the quaternary unit or to another location of the polymer.
4 . A method according to claim 3 wherein said polymer has the general formula (R,R′,R″, N−) + X − , wherein R, R′, are identical or different and can be aliphatic or carry additional substituents; R″ is an alkyl chain with a carbon atom number above 3, X − represents an anion and N can be part of a heterocyclic or aromatic ring.
5 . A method according to claim 4 wherein R″ contains from 5 to 22 carbon atoms.
6 . A method according to claim 1 wherein said composition is applied to the dyed hair in a leave-in manner prior to first shampooing or rinsing and the leave-in treatment is repeated after each shampoo or rinsing.
7 . A method according to claim 1 wherein said polymer has both hydrophobic moieties and sufficient cationic charge density to maintain substantivity to hair while providing a hydrophic barrier to lock-in hair dye.
8 . A method according to claim 1 wherein said composition comprises a hydrophobically modified polymer plus a cationic surfactant.
9 . A method according to claim 8 characterized in that the cationic surfactant is a quaternized surfactant selected from the group consisting of quaternary ammonium compounds of the general formula (R,R′,R″,R′″N) + X − , wherein R, R′, R″ and R′″ can be identical or different, aliphatic or carry additional substituents, X − represents an anion and N is part of a heterocyclic or aromatic ring.
10 . A method according to claim 1 wherein said polymer is selected from the group consisting of a terpolymer of vinylpyrrolidone(VP), dimethylaminopropyl methacrylamide (DMAPMA), and methacryloylaminopropyl lauryldimonium chloride (MAPLDAC); alkyl substituted quaternized cellulose polymers; quaternized hydroxyethyl cellulose polymers with cationic substitution of trimethyl ammonium and dimethyldodecyl ammonium; stearyldimonium hydroxylethyl or propyl cellulose; Cocodimonium hydroxypropyl oxyethyl cellulose; Polyquaternium-24, -41 or 42; nonionic hydrophobically modified polymers, copolymers of PEG-150, decyl alcohol and saturated methylene diphenyldiisocyanate; nonionic guar gum with alkyl groups; hydroxypropyl Guar; PVP/Eicosene copolymer; Nonoxynyl hydroxylcellulose; cetyl hydroxyethyl cellulose; hydroxypropylcellulose; hydroxypropylmethyl cellulose and combinations thereof.
11 . A method according to claim 1 wherein said polymer comprises about 0.1-10% by weight of said composition.
12 . A method according to claim 1 wherein said dye is retained in an amount of at least 10% after multiple shampoo treatments.
13 . A method according to claim 1 wherein the polymer is included in the shampoo or conditioner used in the subsequent shampoo treatment.
14 . A method according to claim 1 wherein said composition does not contain a dye.
15 . A method according to claim 1 wherein said polymer is applied in a leave-in treatment formulation.
16 . A method according to claim 16 wherein said leave in treatment formulation is a gel, cream, mousse or spray.
17 . A method according to claim 1 wherein said shampoo includes conditioner.
18 . A method of protecting dyed hair color from fading which comprises applying a composition comprising a terpolymer of VP-DMAPMA-C12quat, in a leave-in manner in an amount of 0.1-3% by weight, optionally in a 2-in-1 shampoo, to provide at least 10% dye color protection measured as dE change after 10 washes.
19 . A method according to claim 11 wherein said polymer comprises about 0.1-3% of said composition.