Cosmetic composition containing a statistical polymer with a linear chain of ethylenic nature

• US 20070166269A1
• Filed: 11/30/2006
• Published: 07/19/2007
• Est. Priority Date: 12/01/2005
• Status: Abandoned Application

• Current Assignee: L'Oreal SA
• Original Assignee: L'Oreal SA
• Inventors: Cassin, Guillaume, Gourlaouen, Veronique
• Application Number:
  US11/605,955
• Publication Number:
  US 20070166269A1
• Time in Patent Office: Days
• US Class Current: 424/70.160
• CPC Class Codes: A61K 8/8152 Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
• CPC Class Codes: A61Q 19/08 Anti-ageing preparations

Abstract

The present invention relates to a cosmetic composition comprising, in a physiologically acceptable medium, at least one statistical copolymer with a linear main chain of ethylenic nature, in which the said copolymer has a molecular mass of between 15,000 and 600,000 g/mol, contains at least 70% of monomer units derived from monomers for which the homopolymers are hydrophobic and have a glass transition temperature of greater than 40° C., also contains at least one “monomer unit” derived from an at least partially neutralized ionic hydrophilic monomer, and has an overall glass transition temperature of greater than or equal to 45° C., and being in the form of a water-in-oil emulsion or a multiple emulsion.

Claims

1. Cosmetic composition comprising, in a physiologically acceptable medium, at least one statistical copolymer with a linear main chain of ethylenic nature, in which the said copolymer:

(i) has a weight-average molecular mass of between 15,000 and 600,000 g/mol,

(ii) contains at least 70% of monomer units derived from monomers whose homopolymers are hydrophobic and have a glass transition temperature of greater than 40°

C.,

(iii) also contains at least one “

monomer unit”

derived from an at least partially neutralized ionic hydrophilic monomer, and

(iv) has an overall glass transition temperature of greater than or equal to 45°

C., and being in the form of a water-in-oil emulsion or a multiple emulsion.

2. Composition according to claim 1, in which the copolymer comprises more than 75% by weight, relative to its total weight, of “

monomer units”

derived from monomers whose homopolymers have a glass transition temperature of greater than 400°

C.

3. Composition according to claim 1, in which the copolymer comprises more than 80% by weight, relative to its total weight, of “

monomer units”

derived from monomers whose homopolymers have a glass transition temperature of greater than 40°

C.

4. Composition according to claim 1, in which the copolymer comprises up to 95% by weight, relative to its total weight, of “

monomer units”

derived from monomers whose homopolymers have a glass transition temperature of greater than 40°

C.

5. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are chosen from vinyl compounds, acrylates, methacrylates and (meth)acrylamides.

6. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are chosen from;

the vinyl compounds of formula;

CH₂═

CHR₁,

in which R₁ is a group

a C₃ to C₈ cycloalkyl group or a C₆ to C₂₀ aryl group,

the acrylates of formula;

CH₂═

CHCOOR₂

in which R₂ is a tert-butyl group, a C₃ to C₈ cycloalkyl group optionally bridged with a C₁ to C₄ alkylene group, or a C₇ to C₃₀ aralkyl group having a C₁ to C₄ alkyl group,

the methacrylates of formula;

CH₂═

C(CH₃)COOR₃

in which R₃ is an isobutyl or tert-butyl group, a linear or branched C₁ to C₃ alkyl group, a C₃ to C₈ cycloalkyl group optionally bridged with a C₁ to C₄ alkylene group, or a C₇ to C₃₀ aralkyl group having a C₁ to C₄ alkyl group, and

the (meth)acrylamides of formula;

in which R′

denotes H or —

CH₃, and in which R₄ and R₅, which may be identical or different, each represent a hydrogen atom or a linear or branched C₄ to C₁₂ alkyl group, it being understood that R₄ and R₅ cannot simultaneously represent a hydrogen atom.

7. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are selected from the group consisting of styrene, benzyl acrylate, C₃ to C₈ cycloalkyl acrylate optionally bridged with a C₁ to C₄ alkylene group, tert-butyl acrylate, C₁ to -C₃ alkyl methacrylate, tert-butyl methacrylate, benzyl methacrylate and C₃ to C₈ cycloalkyl methacrylate optionally bridged with a C₁ to C₄ alkylene group.

8. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are selected from the group consisting of vinylcyclohexane, styrene, vinyl acetate, benzyl acrylate, cyclohexyl acrylate, tert-butyl acrylate, isobomyl acrylate, norbomyl acrylate, methyl, ethyl, isobutyl, cyclohexyl, benzyl, tert-butyl, isobomyl or norbornyl methacrylate, N-butylacrylamide, N-t-butylacrylamide and N,N-dibutylacrylamide.

9. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are selected from the group consisting of benzyl acrylate, cyclohexyl acrylate, tert-butyl acrylate, isobornyl acrylate, norbornyl acrylate, methyl, ethyl, isobutyl, cyclohexyl, benzyl, tert-butyl, isobornyl or norbornyl methacrylate and styrene.

10. Composition according to claim 1, in which the monomers whose homopolymers have a glass transition temperature of greater than 40°

C. are selected from the group consisting of methyl methacrylate and cyclohexyl methacrylate.

11. Composition according to claim 1, in which the ionic hydrophilic monomer is selected from the group consisting of anionic hydrophilic monomers, cationic hydrophilic monomers and amphoteric monomers, and mixtures thereof.

12. Composition according to claim 11, in which the anionic hydrophilic monomer is defined by formula (I):

CH₂═

CR₆(Z)_n(R₇)_mY  

 

(I)

in which —

Z has one of the following meanings;

C(═

O)O, C(═

O)NH, O, O(C═

O),

n is equal to 0 or 1,

m is equal to 0 or 1,

R₆ is a hydrogen atom, a CH₃ group or a (C₂-C₃₀)alkyl group,

R₇ is selected from the group consisting of linear, saturated or unsaturated and/or branched and/or cyclic (aromatic or non-aromatic) C₁ to C₃₀ alkylene groups, optionally including one or more heteroatoms, and

Y is selected from the following groups;

—

COOH, —

SO₃H, —

OSO₃H, —

OP(OH)₂ and —

OPO(OH)₂.

13. Composition according to claim 12, in which R₆ is a hydrogen atom or a CH₃ or C₂H₅ group and R₇ is selected from the group consisting of C₁ to C₃₀ alkylene, phenylene, benzylene, —

(CH₂-CH═

CH)— and

(CHOH) groups.

14. Composition according to claim 11, in which the anionic hydrophilic monomer is chosen from:

ethylenically unsaturated monomers comprising at least one carboxylic acid (COOH), phosphonic acid (PO₃H₂) or sulfonic acid (SO₃H) function,

carboxylic anhydrides bearing a vinyl bond,

diacids,

and mixtures thereof.

15. Composition according to claim 1, in which the hydrophilic monomer is (meth)acrylic acid.

16. Composition according to of claim 1, in which the weight content of “

monomer units”

derived from ionic hydrophilic monomers in the copolymer is between 5% and 30% by weight relative to the total weight of the copolymer.

17. Composition according to claim 1, in which the weight content of “

monomer units”

derived from ionic hydrophilic monomers in the copolymer is between 10% and 25% by weight relative to the total weight of the copolymer.

18. Composition according to claim 1, in which the weight content of “

monomer units”

derived from ionic hydrophilic monomers in the copolymer is between 10% and 20% by weight relative to the total weight of the copolymer.

19. Composition according to claim 1, in which the copolymer is selected from the group consisting of:

methyl methacrylate/methacrylic acid copolymers;

methyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of methyl methacrylate;

ethyl methacrylate/methacrylic acid copolymers;

ethyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of ethyl methacrylate;

isobutyl methacrylate/methacrylic acid copolymers;

isobutyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of isobutyl methacrylate;

benzyl methacrylate/methacrylic acid copolymers;

benzyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of benzyl methacrylate;

benzyl acrylate/methacrylic acid copolymers;

benzyl acrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of benzyl acrylate;

cyclohexyl methacrylate/methacrylic acid copolymers;

cyclohexyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of cyclohexyl methacrylate;

cyclohexyl acrylate/methacrylic acid copolymers;

cyclohexyl acrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of cyclohexyl acrylate;

tert-butyl methacrylate/methacrylic acid copolymers;

tert-butyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of tert-butyl methacrylate;

tert-butyl acrylate/methacrylic acid copolymers;

tert-butyl acrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of tert-butyl acrylate;

isobomyl methacrylate/methacrylic acid copolymers;

isobomyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of isobomyl methacrylate;

isobomyl acrylate/methacrylic acid copolymers;

isobomyl acrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of isobomyl acrylate;

norbomyl methacrylate/methacrylic acid copolymers;

norbomyl methacrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of norbornyl methacrylate;

norbomyl acrylate/methacrylic acid copolymers;

norbornyl acrylate/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of norbornyl acrylate; and

styrene/methacrylic acid copolymers;

styrene/acrylic acid copolymers, the said copolymers containing between 70% and 90% by weight of styrene.

20. Composition according to claim 1, in which the copolymer also comprises at least one “

monomer unit”

derived from a monomer whose homopolymer has a glass transition temperature of less than 40°

C.

21. Composition according to claim 20, in which the monomer whose homopolymer has a glass transition temperature of less than 40°

C. is present in a content of less than or equal to 25% by weight, relative to the total weight of the copolymer.

22. Composition according to claim 20, in which the monomer whose homopolymer has a glass transition temperature of less than 40°

C. is present in a content ranging from 5% to 25% by weight relative to the total weight of the copolymer.

23. Composition according to claim 20, in which the monomer whose homopolymer has a glass transition temperature of less than 40°

C. is present in a content of less than or equal to 10% by weight relative to the total weight of the copolymer.

24. Composition according to claim 20, in which the monomer whose homopolymer has a glass transition temperature of less than 40°

C. is present in a content ranging from 5% to 10% by weight relative to the total weight of the copolymer.

25. Composition according to claim 1, in which the copolymer is included in a content, expressed as dry matter, ranging from 0.1% to 15% by weight relative to the total weight of the composition.

26. Composition according to claim 1, in which the copolymer is included in a content, expressed as dry matter, ranging from 1% to 10% by weight relative to the total weight of the composition.

27. Composition according to claim 1, in which the copolymer is included in a content, expressed as dry matter, ranging from 1% to 5% by weight relative to the total weight of the composition.

28. Composition according to claim 14, in which the ionic hydrophilic monomer includes an anionic hydrophilic monomer selected from the group consisting of acrylic acid, methacrylic acid, 2-carboxyethyl (meth)acrylate, vinylbenzoic acid, acrylamidoglycolic acid CH₂═

CHCONHCH(OH)CO₂H, maleic acid, acrylamidopropanesulfonic acid, acrylamido-2-methylpropanesulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 3-propylsulfonic acid methacrylate or acrylate (CH₂═

C(CH₃)CO₂(CH₂)₃SO₃H), 2-ethylsulfonic acid methacrylate or acrylate (CH₂═

C(CH₃)CO₂(CH₂)₂SO₃H) and methyl vinyl sulfone, vinylphosphonic acid (CH₂═

CH—

PO(OH)₂) and 2-ethylphosphonic acid methacrylate (CH₂═

C(CH₃)COOCH₂CH₂OP(O)(OH)₂), maleic anhydride, crotonic acid, itaconic acid, fumaric acid and maleic acid and mixtures thereof.

29. Composition according to claim 1, which is in the form of a water-in-oil emulsion.

30. Composition according to claim 29, in which the surfactant is selected from the group consisting of silicone surfactants, polyisobutylene surfactants with esterified succinic end groups and emulsifying silicone elastomers, and mixtures thereof.

31. Composition according to claim 29, in which the inner aqueous phase is non gelled.

32. Composition according to claim 30, in which the said silicone surfactant is selected from the group consisting of alkyl dimethicone copolyols and dimethicone copolyols.

33. Composition according to claim 30, in which the silicone surfactant is chosen from the mixture of cyclomethicone and of dimethicone copolyol, lauryl methicone copolyol, cetyl dimethicone copolyol, and the polyglyceryl-4 isostearate/cetyldimethicone copolyol/hexyl laurate, and mixtures thereof.

34. Composition according to claim 29, in which the fatty phase comprises at least one silicone oil.

35. Composition according to claim 29, also comprising at least one co-emulsifier.

36. Composition according to claim 35, in which the said co-emulsifier is a alkyl ester of polyols.

37. Composition according to claim 36, in which the alkyl ester of polyols is a glycerol and/or sorbitan ester selected from the group consisting of polyglyceryl isostearate, sorbitan isostearate and sorbitan glyceryl isostearate, and mixtures thereof.

38. Composition according to claim 1, which is in the form of a water-in-oil-in-water multiple emulsion.

39. Composition according to claim 38, which is in the form of a multiple emulsion obtained by emulsifying a water-in-oil emulsion comprising an inner aqueous phase and a fatty phase comprising at least one oil and at least one surfactant, in a gelled aqueous phase.

40. Composition according to claim 39, in which the outer aqueous phase contains at least one surfactant copolymer consisting of a major fraction of a monoolefinically unsaturated C₃C₆ carboxylic acid monomer or the anhydride thereof and of a minor fraction of acrylic acid fatty ester monomer.

41. Composition according to claim 40, in which the surfactant copolymer is an acrylate/C₁₀-C₃₀ alkyl acrylate copolymer.

42. Composition according to claim 39, in which one of the aqueous phases has a water activity value of less than or equal to 0.85.

43. Cosmetic method for tensioning the skin comprising applying to said skin a cosmetic composition in the form of a water-in-oil emulsion or a multiple emulsion containing a polymer as described in claim 1.

45. Cosmetic product comprising at least (i) one first composition in the form of a water-in-oil emulsion or a multiple emulsion, containing at least one copolymer as described in claim 1, and (ii) one second composition comprising at least one physiologically acceptable medium.

46. Kit of compositions comprising a product according to claim 45.

47. Kit according to claim 46, in which the first and second compositions are packaged in separate compartments or containers.

48. Kit according to claim 47, in which the said compositions are packaged in the form of a double-pump distribution assembly.

44. Cosmetic method for reducing or treating age signs, comprising applying to the skin at least one composition comprising, in a physiologically acceptable medium, at least one statistical copolymer with a linear main chain of ethylenic nature, in which the said copolymer:

(i) has a weight-average molecular mass of between 15,000 and 600,000 g/mol,

(ii) contains at least 70% of monomer units derived from monomers whose homopolymers have a glass transition temperature of greater than 40°

C.,

(iii) also contains at least one “

monomer unit”

derived from an at least partially neutralized ionic hydrophilic monomer, and

(iv) has an overall glass transition temperature of greater than or equal to 45°

C.,

and being in the form of a water-in-oil emulsion or a multiple emulsion, in an amount that is effective for smoothing out or effacing wrinkles and fine lines on human skin by means of a tensioning effect.