HAIR REPAIR COMPOSITION

Abstract

The invention relates to a method for mending split ends of hair comprising contacting the hair with split ends with a composition comprising at least one non-cellulosic polysaccharide derivative containing at least one hydroxyalkyl group, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation MS lower than 1.0.

Claims

1-15: (canceled)

16. A method for mending split ends of hair comprising contacting the hair with split ends with a composition comprising at least one non-cellulosic polysaccharide derivative comprising at least one hydroxyalkyl group, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation MS lower than 1.0.

17. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative is a galactomannan derivative.

18. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative is a guar derivative.

19. The method according to claim 16, wherein said hydroxyalkyl group are C.sub.1-C.sub.6 hydroxyalkyl groups.

20. The method according to claim 16, wherein said hydroxyalkyl group is a hydroxypropyl group.

21. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation between about 0.1 and about 1.0.

22. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative has an average molecular weight of about 100,000 g/mol and about 4,000,000 g/mol.

23. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative further comprises at least one cationic group.

24. The method according to claim 23, wherein said cationic group is selected from the group consisting of primary, secondary or tertiary amino groups, quaternary ammonium, sulfonium groups, phosphinium groups, and mixtures thereof.

25. The method according to claim 23, wherein said non-cellulosic polysaccharide derivative has a cationic degree of substitution DScat between about 0.02 and about 0.30.

26. The method according to claim 16, wherein the composition comprises from 0.01 to 2 pbw of said non-cellulosic polysaccharide derivative relative to the total weight of the composition.

27. A hair care composition for mending split ends comprising at least one non-cellulosic polysaccharide derivative comprising at least one hydroxyalkyl group, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation MS lower than 1.0.

28. The composition according to claim 27, wherein the hair care composition is a leave-on hair care composition.

29. The composition according to claim 27, wherein the hair care composition is a rinse-off hair care composition.

30. The method according to claim 16, wherein the C.sub.1-C.sub.6 hydroxyalkyl groups are selected from the group consisting of a hydroxymethyl group, a hydroxyethyl group, a hydroxypropyl group, a hydroxybutyl group, and combinations thereof.

31. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation between about 0.2 and about 0.9.

32. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative has an average molecular weight of about 150,000 g/mol and about 4,000,000 g/mol.

33. The method according to claim 16, wherein said non-cellulosic polysaccharide derivative has an average molecular weight of about 200,000 g/mol and 4,000,000 g/mol.

34. The method according to claim 23, wherein said non-cellulosic polysaccharide derivative has a cationic degree of substitution DScat between about 0.05 and about 0.20.

Description

EXAMPLES

[0095] The invention will now be described in further detail by way of the following non limiting examples, wherein the abbreviations have the usual meaning in the art. Water amount indicated as “q.s.” are intended to be “the amount required to complete to 100 pbw”.

[0096] All ingredients are expressed by weight percent of the whole formulation and as level of active ingredients.

[0097] The following serum compositions were prepared.

TABLE-US-00001 Comparative Comparative Control Formulation Formulation Formulation Formulation Formulation Formulation 1 2 3 1 2 Cationic guar — 1 — — — — derivative 1 (a) Cationic guar — — 1 — — — derivative 2 (b) Cationic guar — — — 1 — — derivative 3 (c) Cationic guar — — — — 1 — derivative 4 (d) Jaguar C-13S (e) — — — — — 1 Ethanol 10 10 10 10 10 10 Glycerin 1 1 1 1 1 1 Panthenol 0.5 0.5 0.5 0.5 0.5 0.5 Preservative <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 Water q.s. q.s. q.s. q.s. q.s. q.s. (a) Hydroxypropyl guar having a molecular weight between 2,000,000 g/mol and 3,000,000 g/mol and having a degree of hydroxyalkylation between 0.1 and 1.0, available from Rhodia (b) Hydroxypropyl guar having a molecular weight between 1,000,000 g/mol and 2,000,000 g/mol and having a degree of hydroxyalkylation between 0.1 and 1.0, available from Rhodia (c) Hydroxypropyl guar hydroxypropyltrimonium chloride having a molecular weight below 2,000,000 g/mol, a cationic degree of substitution below 0.15 and a degree of hydroxyalkylation between 0.1 and 1.0, available from Rhodia; (d) Hydroxypropyl guar having a molecular weight between 2,000,000 g/mol and 3,000,000 g/mol and having a degree of hydroxyalkylation greater than 1.0, available from Rhodia (e) Guar Hydroxypropyl trimonium chloride having a molecular weight greater than 1,500,000 g/mol and having a cationic degree of substitution of about 0.15

[0098] Formulation Procedure

[0099] Disperse the cationic guar derivative in water. Add glycerin and panthenol. Adjust pH to 4.5-5. Add the preservative and adjust the pH to 4.7. Add the ethanol and verify the pH (<5). Add water to qsp 100.

[0100] Assessment of the Performances on Hair Tresses

[0101] Hair tresses were purchased from Kerling International

[0102] European Natural Human Hair of the following characteristics: Color 5/0. 19 cm total length, 17 cm of free hair. 2.5 cm width. 4 g weight free hair.

[0103] Hair Pre-Treatment Protocol

[0104] Wet the tress during 1 min under running water (or soak during 10 min in water if using several hair tresses). Apply on the whole tress 3 ml of a 10 pbw active sodium diethoxylated dodecyl sulfate (SLE2S) solution. Shampoo during 1 min, 30 sec on each side. Rinse during 1 min. Squeeze between index and middle finger. Detangle using middle teeth comb followed by fine teeth comb. Leave overnight in the controlled climate room (RH=50%±10, T=23° C.).

[0105] Hair Damaging Protocol to Obtain Split Ends

[0106] The repeated grooming apparatus, custom-built, is used. The device consists of 10 compartments and allows 10 hair tresses to be combed simultaneously. The 4 combs per compartment are mounted at 90° angles, allowing one complete revolution to comb the tress 3 times. Collection drawers are located under each tress to collect the broken fragments. All experiments were performed under controlled temperature and humidity conditions, in a climate controlled room (RH=50%±10, T=23° C.).

[0107] The pre-treated hair tresses undergo repeated grooming during 7.5 hours at 19 rpm in order to create the split-ends.

[0108] Measurement of the Percentage of Split End Repaired

[0109] The whole procedure takes place in the controlled climate room (RH=50%±10, T=23° C.). Use 4 g hair tresses pre-treated and then damaged according to the protocols described above. Pick 10 hair fibers all bearing split ends and glue them together with a scotch tape in order to obtain a 10-fiber kit. Count the split ends under the lighted magnifier. Weight 2 mg of the product (resp.: Formulation 1, Formulation 2 or Comparative Formulation) in a plastic weighting cup with the aid of a 0.5 ml capacity disposable transfer pipette dropper, on high precision balance. Gather the 10 fibers by holding them close to the split ends and soak them in the product to collect the maximum quantity. Spread the product out on the split ends (on the approximately last 1 cm towards the tips) with the finger until product absorption. Smooth the fibers once more and put the 10-fiber kit in the oven during 1 min.

[0110] If needed smooth once to align the fibers and count the split ends left under the lighted magnifier.

[0111] The percent of split end repaired (% of Repair) was calculated as follows:

[00003]$\%\mathrm{of}\mathrm{Repair}=\frac{\left(\mathrm{Original}\mathrm{number}\mathrm{of}\mathrm{split}\mathrm{ends}\right)-\left(\mathrm{number}\mathrm{of}\mathrm{split}\mathrm{ends}\mathrm{left}\right)}{\mathrm{Original}\mathrm{number}\mathrm{of}\mathrm{split}\mathrm{ends}}$

[0112] Results were the following:

TABLE-US-00002 Control Comparative Comparative Formulation Formulation Formulation 1 Formulation 2 Formulation 3 Formulation 1 Formulation 2 % of Repair 10 95 85 75 55 55 (calculation) % of Repair Reference +++ +++ +++ + + (trend)

[0113] Formulation 1, Formulation 2 and Formulation 3, which include a specific non-cellulosic polysaccharide derivative in accordance with the invention, exhibit significantly improved split end mending compared to the Comparative Formulations (which includes non-cellulosic polysaccharides of the prior art outside the scope of the invention) and compared to the Control Formulation (which contains no ingredient acting specifically as agent for mending split ends).

[0114] These examples illustrate that the specific non-cellulosic polysaccharide derivative according to the invention, namely non-cellulosic polysaccharide derivative containing at least one hydroxyalkyl group, wherein said non-cellulosic polysaccharide derivative has a degree of hydroxyalkylation MS lower than 1.0, is highly effective in mending split ends.