Wax dispersions

• US 20060116524A1
• Filed: 12/19/2003
• Published: 06/01/2006
• Est. Priority Date: 01/08/2003
• Status: Active Grant

• Current Assignee: Johnson & Johnson Consumer Inc. (Johnson & Johnson)
• Original Assignee: Cognis International GmbH (BASF SE)
• Inventors: Ansmann, Achim, Bruening, Stefan, Leonard, Mark, Capito, Marco, Sporer, Roland
• Granted Patent: US 8,658,812 B2
• Time in Patent Office: Days
• US Class Current: 554/166
• CPC Class Codes: A61K 8/0208 Tissues; Wipes; Patches
• CPC Class Codes: A61K 8/044 Suspensions
• CPC Class Codes: A61K 8/068 Microemulsions
• CPC Class Codes: A61K 8/33 containing oxygen
• CPC Class Codes: A61K 8/345 containing more than one hydroxy group
• CPC Class Codes: A61K 8/362 Polycarboxylic acids
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin

Abstract

The disclosed invention provides wax dispersions with an average particle size of 0.5 to 100 μm containing (a) a wax phase with a melting point above 25° C. which contains at least one oil or wax component selected from dialkyl(ene) ethers, dialkyl(ene) carbonates, dicarboxylic acids, hydroxyfatty alcohols, and mixtures thereof and at least one emulsifier, and (b) a water phase. The wax dispersions are particularly useful as a basis for cosmetic preparations and, more particularly, for impregnating and wetting utility and sanitary wipes used for personal hygiene and body care.

Claims

1-23. -23. (canceled)

24. A wax dispersion with an average particle size of 0.5 to 100 μ

m, comprising

(a) a wax phase with a melting point above 25°

C. which comprises at least one oil or wax component selected from the group consisting of dialkyl(ene) ethers, dialkyl(ene) carbonates, dicarboxylic acids, hydroxyfatty alcohols, and mixtures thereof and at least one emulsifier; and

(b) a water phase.

25. A wax dispersion according to claim 24, wherein

(a) the wax phase comprises 1 to 75% by weight and

(b) the water phase comprises 25 to 99% by weight,

based on the weight of the dispersion.

26. A wax dispersion according to claim 24, wherein the at least one emulsifier of the wax phase is selected from the group of nonionic emulsifiers.

27. A wax dispersion according to claim 24, wherein the wax phase melts at about 35 to 50°

C.

28. A wax dispersion according to claim 24, wherein the average particle size is 5 to 50 μ

m.

29. A wax dispersion according to claim 24, wherein the wax phase comprises less than 3% by weight of water, based on the total weight of the wax phase.

30. A wax dispersion according to claim 24, wherein the wax phase contains at least one further component selected from the group consisting of an other wax-like lipid component and an other oil component.

31. A wax dispersion according to claim 30, wherein the other wax-like lipid component is selected from the group consisting of C_12-24 fatty alcohols, mono-, di- or triesters of glycerol, C_12-24 fatty acids, mono- or diesters of ethylene glycol, C_12-24 fatty acids, and mixtures thereof.

32. A wax dispersion according to claim 24, further comprising at least one polymer.

33. A wax dispersion according to claim 32, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

34. A wax dispersion according to claim 24, wherein the wax phase further comprises at least one active component.

35. A wax dispersion according to claim 24, further comprising at least one humectant.

51. A body care preparation comprising a wax dispersion according to claim 24.

36. A wax dispersion with an average particle size of 0.5 to 100 μ

m comprising

(a) 1 to 50% by weight of a wax phase with a melting point above 25°

C. which comprises, based on the overall weight of the wax dispersion,

(1) 0.1 to 30% by weight of at least one oil or wax component selected from C_14-30 dialkyl(ene) ethers, C_14-30 dialkyl(ene) carbonates, C_9-34 dicarboxylic acids or C₁₂-30 hydroxyfatty alcohols, and mixtures thereof,

(2) 0.1 to 10% by weight of at least one other oil,

(3) 0.1 to 10% by weight of at least one nonionic emulsifier, and

(4) 0.1 to 40% by weight of at least one other wax-like lipid component; and

(b) 50 to 99% by weight of a water phase.

37. A wax dispersion according to claim 36, further comprising 0.01 to 5.0% by weight of at least one polymer, based on the overall wax dispersion.

38. A wax dispersion according to claim 37, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

39. A wax dispersion according to claim 36, wherein the wax phase melts at about 35 to 50°

C.

40. A wax dispersion according to claim 36, wherein the average particle size is 5 to 50 μ

m.

41. A wax dispersion according to claim 36, wherein the wax phase comprises less than 3% by weight, based on the weight of the wax phase, of water.

42. A wax dispersion according to claim 36, wherein the wax phase further comprises at least one active component.

43. A wax dispersion according to claim 36, further comprising at least one humectant.

52. A body care preparation comprising a wax dispersion according to claim 36.

44. A process for the production of a wax dispersion with an average particle size of 0.5 to 100 μ

m, and having (a) a wax phase with a melting point above 25°

C. which comprises at least one oil or wax component selected from the group consisting of dialkyl(ene) ethers, dialkyl(ene) carbonates, dicarboxylic acids, hydroxyfatty alcohols, and mixtures thereof and at least one emulsifier; and

(b) a water phase, said process comprising

(1) providing a preliminary emulsion of the wax phase containing a water phase and having a temperature above the melting range of the waxes,

(2) introducing the preliminary emulsion, under pressure, into a polymer-containing water phase which has a temperature of 1 to 30°

C.

45. A process according to claim 44, further comprising homogenizing the preliminary emulsion at least once before introducing it into the water phase of step (2).

46. A process according to claim 44, further comprising cooling the preliminary emulsion in a heat exchanger before introducing it into the water phase of step (2).

47. A process according to claim 44, wherein the preliminary emulsion also contains a polymer.

48. A process according to claim 47, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

49. A process according to claim 44, wherein the preliminary emulsion is introduced into the water phase of step (B) by spraying under pressure through a nozzle.

50. A process according to claim 44, wherein the resulting wax dispersion comprises

(a) 1 to 75% by weight of the wax phase and

(b) 25 to 99% by weight of the water phase, based on the overall weight of the dispersion.