COMPOSITION COMPRISING A DISPERSION OF POLYMER PARTICLES IN A NON-AQUEOUS MEDIUM, A CATIONIC POLYMER AND AN ANIONIC POLYMER

Abstract

The present invention relates to an aqueous composition comprising at least one dispersion of polymer particles in a non-aqueous medium, at least one cationic polymer and at least one anionic polymer. The present invention also relates to a cosmetic treatment process, notably a process for styling keratin fibres, in particular human keratin fibres such as the hair, using this composition. Finally, the present invention relates to the use of this composition for the cosmetic treatment of keratin fibres, in particular of human keratin fibres such as the hair, and in particular for styling the hair, i.e. for shaping and/or fixing the head of hair.

Claims

1-18. (canceled)

19. A composition comprising: (a) at least one dispersion of particles of at least one polymer (a′) in a non-aqueous medium, wherein the dispersion is stabilized with at least one polymer stabilizer, (b) at least one cationic polymer, and (c) at least one anionic polymer.

20. The composition according to claim 19, wherein the at least one polymer (a′) is chosen from polyurethanes, polyurethane-acrylics, polyureas, polyurea-polyurethanes, polyester-polyurethanes, polyether-polyurethanes, polyesters, polyester amides, fatty-chain polyesters, alkyds, acrylic polymers, acrylic copolymers, vinyl polymers, vinyl copolymers, acrylic-silicone copolymers, polyacrylamides, silicone polymers, fluoro polymers, or mixtures thereof.

21. The composition according to claim 19, wherein at least one polymer (a′) is an ethylenic polymer.

22. The composition according to claim 19, wherein at least one polymer (a′) comprises an ethylenically unsaturated acid monomer or anhydride thereof.

23. The composition according to claim 19, wherein at least one polymer (a′) is chosen from: methyl acrylate homopolymers, ethyl acrylate homopolymers, methyl acrylate/ethyl acrylate copolymers, methyl acrylate/ethyl acrylate/acrylic acid copolymers, methyl acrylate/ethyl acrylate/maleic anhydride copolymers, methyl acrylate/acrylic acid copolymers, ethyl acrylate/acrylic acid copolymers, methyl acrylate/maleic anhydride copolymers, ethyl acrylate/maleic anhydride copolymers, or mixtures thereof.

24. The composition according to claim 19, wherein the non-aqueous medium comprises at least one oil chosen from carbon-based oils, hydrocarbon-based oils, fluoro oils, silicone oils, or mixtures thereof.

25. The composition according to claim 19, wherein the non-aqueous medium comprises at least one hydrocarbon-based oil.

26. The composition according to claim 19, comprising at least one polymer stabilizer chosen from isobornyl (meth)acrylate polymers.

27. The composition according to claim 19, wherein the total amount of the particle dispersion ranges from 0.1% to 20% by weight, relative to the weight of the composition.

28. The composition according to claim 19, wherein one or more cationic polymers (b) are chosen from homopolymers or copolymers comprising at least one unit derived from vinylamine, and optionally further comprising one or more units derived from vinylformamide, cationic polysaccharides, alkyldiallylamine cyclopolymers, or dialkyldiallylammonium cyclopolymers.

29. The composition according to claim 19, wherein the total amount of cationic polymers (b) ranges from 0.05% to 15% by weight, relative to the total weight of the composition.

30. The composition according to claim 19, wherein one or more anionic polymers (c) are chosen from crosslinked or non-crosslinked acrylic or methacrylic acid homopolymers or copolymers and salts thereof, crosslinked or non-crosslinked 2-acrylamido-2-methylpropanesulfonic acid homopolymers and salts thereof, and crosslinked or non-crosslinked acrylamide copolymers thereof and salts thereof, the branched block butyl acrylate/acrylic acid/methacrylic acid anionic polymer, anionic polysaccharides, or mixtures thereof.

31. The composition according to claim 19, wherein the total amount of anionic polymers ranges from 0.05% to 15% by weight, relative to the total weight of the composition.

32. The composition according to claim 19, wherein a weight ratio of the total amount of cationic polymers and the total amount of anionic polymers ranges from 10:90 to 90:10.

33. The composition according to claim 19, further comprising water.

34. A method for styling keratin fibers comprising applying to said keratin fibers a composition comprising: (a) at least one dispersion of particles of at least one polymer (a′) in a non-aqueous medium, wherein the dispersion is stabilized with at least one polymer stabilizer, (b) at least one cationic polymer, and (c) at least one anionic polymer.

35. The method according to claim 34, wherein the at least one polymer (a′) is chosen from polyurethanes, polyurethane-acrylics, polyureas, polyurea-polyurethanes, polyester-polyurethanes, polyether-polyurethanes, polyesters, polyester amides, fatty-chain polyesters, alkyds, acrylic polymers, acrylic copolymers, vinyl polymers, vinyl copolymers, acrylic-silicone copolymers, polyacrylamides, silicone polymers, fluoro polymers, or mixtures thereof.

36. The method according to claim 34, comprising at least one polymer stabilizer chosen from isobornyl (meth)acrylate polymers.

37. The method according to claim 34, wherein one or more cationic polymers (b) are chosen from homopolymers or copolymers comprising at least one unit derived from vinylamine, and optionally further comprising one or more units derived from vinylformamide, cationic polysaccharides, alkyldiallylamine cyclopolymers, or dialkyldiallylammonium cyclopolymers.

38. The method according to claim 34, wherein one or more anionic polymers (c) are chosen from crosslinked or non-crosslinked acrylic or methacrylic acid homopolymers or copolymers and salts thereof, crosslinked or non-crosslinked 2-acrylamido-2-methylpropanesulfonic acid homopolymers and salts thereof, and crosslinked or non-crosslinked acrylamide copolymers thereof and salts thereof, the branched block butyl acrylate/acrylic acid/methacrylic acid anionic polymer, anionic polysaccharides, or mixtures thereof.

Description

EXAMPLES

Preparation Example

[0378] In a first step, 1300 g of isododecane, 315.2 g of isobornyl acrylate, 12.5 g of methyl acrylate, 12.5 g of ethyl acrylate and 3.4 g of tert-butyl peroxy-2-ethylhexanoate (Trigonox 21S from Akzo) were placed in a reactor.

[0379] The mixture was heated to 90° C. under argon with stirring and, after reaction, 540 g of isododecane and 360 g of ethyl acetate were added.

[0380] After 2 hours of reaction, 1430 g of isododecane were added to the reactor feedstock and the mixture was heated to 90° C.

[0381] In a second step, a mixture of 145 g of methyl acrylate, 934 g of ethyl acrylate, 157 g of acrylic acid, 12.36 g of Trigonox 21S, 741.6 g of isododecane and 494.4 g of ethyl acetate were added over 2 hours 30 minutes by pouring. After reaction, 3 liters of an isododecane/ethyl acetate mixture (60/40 weight/weight) were added and total evaporation of the ethyl acetate and partial evaporation of the isododecane was performed to obtain a solids content of 50% by weight.

[0382] A dispersion in isododecane of methyl acrylate/ethyl acrylate/acrylic acid copolymer particles stabilized with an isobornyl acrylate/methyl acrylate/ethyl acrylate statistical copolymer stabilizer was obtained.

[0383] The oily dispersion contains in total (stabilizer+particles) 10% acrylic acid, 10% methyl acrylate, 60% ethyl acrylate and 20% isobornyl acrylate.

[0384] The polymer particles of the dispersion have a number-mean size of about 160 nm.

Composition Examples

Example 1

[0385] Compositions (A1), (A2) (A3), (A4), (A5), (A6) and (A7) were prepared using the ingredients of which the contents, expressed as mass percentages of active material, relative to the total weight of each composition, are mentioned in the table below.

TABLE-US-00002 TABLE 2 A1 (inv) A2 A3 A4 A5 A6 A7 Ammonium 1.615 1.615 1.615 1.615 polyacryloyldimethyl taurate (Hostacerin AMPS ®) Polyquaternium-67 1.29 1.29 1.29 1.29 (Softcat Polymer SL- 100) Sodium chloride 2 2 2 2 2 2 2 Dispersion according to 1.75 AM 1.75 AM 1.75 AM 1.75 AM Preparation Example 1 at 50% in isododecane Water qs 100 100 100 100 100 100 100

[0386] Each of the compositions (A1) to (A7) thus obtained was applied to 2.7 g locks of natural hair washed beforehand with a DOP shampoo, at a rate of 1 g of composition per lock.

[0387] The locks of hair were then rinsed with water for 15 seconds. The locks were then towel-dried and then laid flat and left to dry naturally.

[0388] After this treatment, the fixing and the shape hold were evaluated on the dry hair, by six trained experts: [0389] The fixing was evaluated by applying pressure to the lock between two fingers of the hand: the more difficult the lock of hair is to crack, the stronger the fixing [0390] The hold was evaluated by passing the fingers through the lock three times from the root to the end: the more the lock conserves its initial structure after passing the fingers through, the greater the hold.

[0391] These two parameters are graded from 0 to 5. The minimum limit of these two parameters is acquired after wetting an untreated lock with water: the fixing and hold are thus zero. The maximum limit is obtained after applying to the lock Vivelle Dop brand “béton” (ultra-strong hold) fixing styling gel: its fixing and hold parameters are each 5 out of 5.

[0392] Results

TABLE-US-00003 TABLE 3 A1 (invention) A2 A3 A4 A5 A6 A7 Fixing 3 0 0 1.5 1.5 1.5 0 Fixing 3 0 0 1.5 0.5 0.5 0 persistence

[0393] The locks treated with composition (A1) have good fixing and good fixing persistence.

[0394] Furthermore, the locks have a feel that is neither tacky nor greasy.

Examples 2 to 5

[0395] Compositions 2 to 5 were prepared from the following ingredients.

TABLE-US-00004 TABLE 4 2 3 4 5 Ammonium 0.91 1.61 polyacryloyldimethyl taurate (Hostacerin AMPS ®) AMP-acrylates/allyl 1.06 1.06 methacrylate copolymer (Fixate G100 L from Lubrizol) Carrageenan (Satiagum 1.26 VPC 430 from Cargill) Vinylamine/ 0.94 vinylformamide copolymer (Luviquat 9030 from BASF) Hydroxypropyl guar 1.09 hydroxypropyltrimonium chloride (Jaguar C162 from Solvay) Polyquaternium-67 1.29 (Softcat Polymer SL-100) Chitosan (Kionutrime 0.74 CSG from Kitozyme) Sodium chloride 10 2 10 5 Dispersion according to 2.5 AM 2.5 AM 2.5 AM 2.5 AM Preparation Example 1 at 50% in isododecane Water qs 100 g 100 g 100 g 100 g

[0396] The locks treated with compositions 2 to 5 have good fixing and good fixing persistence.