Method for improving color retention in artificially colored hair

1. A method for improving color retention in artificially-colored hair comprising applying a treatment composition to shampooed, rinsed, wet hair that has been color-treated previously, the treatment composition comprising:

(a) a hydrophobic particulate material having a median particle size between about 10 nm and about 20 μm, said hydrophobic particulate material comprising from about 0.1% to about 2.0% by weight of said composition;

(b) a silicone-based hydrophobic film former comprising from about 0.5% to about 20% by weight of said composition; and

(c) a volatile hydrocarbon or silicone fluid having a vapor pressure above about 0.01 mmHg at 20° C.;

wherein the aggregate weight percentage of all non-volatile water-soluble or water-dispersible organic constituents in said composition is less than 5%, based on the entire weight of the composition; and

wherein the loss of color from said hair is reduced or prevented following at least one shampooing as compared to otherwise identical hair that has not been treated by said treatment composition; and

wherein said composition is anhydrous.

2. The method according to claim 1 , wherein said hydrophobic particulate material comprises a hydrophobically surface-modified oxide selected from the group consisting of aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide, tin dioxide, zinc oxide, iron oxide and combinations thereof.

3. The method according to claim 2 , wherein said oxide is surface modified with alkylsilane groups.

4. The method according to claims 3 , wherein said alkylsilane is caprylylsilane.

5. The method according to claim 4 , wherein said oxide is alumina or silica.

6. The method according to claim 5 , wherein said alumina is fumed alumina.

7. The method according to claim 6 , wherein the fumed alumina is surface modified with alkylsilane groups.

8. The method according to claim 7 , wherein said alkylsilane is caprylylsilane.

9. The method according to claim 5 , wherein said silica is fumed silica.

10. The method according to claim 9 , wherein the fumed silica is surface modified with alkylsilane groups.

11. The method according to claim 1 , wherein said silicone-based hydrophobic film former comprises dimethicone, amodimethicone, dimethiconol, silicone polyurethane, silicone acrylate, or a combination thereof.

12. The method according to claim 11 , wherein said silicone-based hydrophobic film former comprises a silicone acrylate copolymer.

13. The method according to claim 12 , wherein said silicone acrylate copolymer is a copolymer comprising a poly(alkyl)acrylate backbone and a dimethicone polymer grafted to an alkyl ester side chain.

14. The method according to claim 1 , wherein said step of applying distributes said composition across strands of hair to form a substantially uniform coating on the shafts of the hair fibers.

15. The method according to claim 13 , wherein the vehicle further comprises ethyl alcohol.

16. The method according to claim 1 , wherein the loss of color from said hair is reduced or prevented following at least two shampooing as compared to otherwise identical hair that has not been treated.

17. The method according to claim 16 , wherein said artificially colored hair has been dyed with an oxidative dye.

18. The method according to claim 2 , wherein the composition comprises said volatile silicone fluid.

19. The method according to claim 18 , wherein the volatile silicone is selected from the group comprising cyclomethicone tetramer, cyclomethicone pentamer, cyclomethicone hexamer, trisiloxane, methyl trimethicone, or combinations thereof.

20. The method according to claim 19 , wherein the composition is in the form of an emulsion comprising water.

21. The method according to claim 20 , wherein the vehicle further comprises ethyl alcohol.

22. The method according to claim 20 , further comprising an emulsifier.

23. The method according to claim 22 , wherein said emulsifier comprises an organosiloxane polymer having side chains comprising —(EO) m — and/or —(PO) n — groups, where the sum of n and m is about 50 or less, the side chains being terminated with hydrogen or C1-8 alkyl groups.

24. The method according to claim 22 , wherein said emulsifier comprises an emulsifier selected from the group consisting of peg10 dimethicone, peg/ppg-18/18 dimethicone, peg/ppg-19/19 dimethicone, and cetyl peg/ppg-10/1 dimethicone.

25. The method according to claim 22 , wherein said oxide is alumina surface modified with caprylylsilane.

26. The method according to claim 25 , wherein said alumina is fumed alumina.

27. The method according to claim 1 , wherein the loss of color from said hair is reduced or prevented following at least two shampooing as compared to otherwise identical hair that has not been treated.

28. The method according to claim 1 , further comprising a quaternium or polyquaternium water soluble film former.

29. The method according to claim 2 wherein said silicone acrylate copolymer is a copolymer comprising a poly(alkyl)acrylate backbone and a dimethicone polymer grafted to an alkyl ester side chain.

30. The method according to claim 1 , where said silicone film former comprises dimethicone.

31. The method according to claim 1 , where said silicone film former comprises a silicone gum.

32. The method according to claim 1 , where said composition is applied to color-treated hair after every shampoo for at least one week.

33. The method according to claim 1 , where said composition is applied to color-treated hair after every shampoo for at least two weeks.

34. The method according to claim 1 , wherein the weight ratio of said hydrophobic particulate material to said silicone-based hydrophobic film former is from about 1:5 to about 1:100.

35. The method according to claim 1 , wherein the weight ratio of said hydrophobic particulate material to said silicone-based hydrophobic film former is from about 1:8 to about 1:20.