Wax dispersions

• US 8,658,812 B2
• Filed: 12/19/2003
• Issued: 02/25/2014
• 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, Brning, Stefan, Capito, Marco, Sprer, Roland, Leonard, Mark
• Primary Examiner(s): Mayes, Melvin C
• Assistant Examiner(s): COHEN, STEFANIE J
• Application Number:
  US10/541,111
• Publication Number:
  US 20060116524A1
• Time in Patent Office: 3,721 Days
• Field of Search: 554/166, 585/9, 106/271
• 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. A wax dispersion having a particle size distribution such that 50% of the dispersed wax is <

10 micrometers (μ

m), comprising;

(a) 10% to 75% by weight, based on the dispersion, of a wax phase with a melting point in the range of from above 25°

C. to about 50°

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

mixtures thereof, and at least one emulsifier; and

(b) a water phase.

2. The wax dispersion according to claim 1, wherein the at least one emulsifier of the wax phase is selected from the group of nonionic emulsifiers.

3. The wax dispersion according to claim 1, wherein the average particle size is 5 to 50 μ

m.

4. The wax dispersion according to claim 1, wherein the wax phase comprises less than 3% by weight of water, based on the total weight of the wax phase.

5. The wax dispersion according to claim 1, wherein the wax phase contains at least one further component selected form the group consisting of an other wax-like lipid component and an other oil component.

6. The wax dispersion according to claim 5, 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.

7. The wax dispersion according to claim 1, further comprising at least one polymer.

8. The wax dispersion according to claim 7, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

9. The wax dispersion according to claim 1, wherein the wax phase further comprises at least one active component.

10. The wax dispersion according to claim 1, further comprising at least one humectant.

11. A body care preparation comprising a wax dispersion according to claim 1.

12. A wax dispersion having a particle size distribution such that 50% of the dispersed wax is <

10 micrometers (μ

m) comprising;

(a) 10-25% by weight, based on the wax dispersion, of a wax phase with a melting point in the range of about 35 to about 50°

C. which comprises;

(1) at least one oil or wax component selected from C_14-30 dialkyl(ene) carbonates, C_9-34 dicarboxylic acids or C_12-30 hydroxyfatty alcohols, and mixtures thereof,

(2) at least one other oil,

(3) at least one nonionic emulsifier, and

(4) at least one other wax-like lipid component; and

(b) 75-90% by weight, based on the wax dispersion, of a water phase.

13. The wax dispersion according to claim 12, further comprising 0.01 to 5.0% by weight of at least one polymer, based on the overall wax dispersion.

14. The wax dispersion according to claim 13, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

15. The wax dispersion according to claim 12, wherein the average particle size is 5 to 50 μ

m.

16. The wax dispersion according to claim 12, wherein the wax phase comprises less than 3% by weight, based on the weight of the wax phase, of water.

17. The wax dispersion according to claim 12, wherein the wax phase further comprises at least one active component.

18. The wax dispersion according to claim 12, further comprising at least one humectant.

19. A body care preparation comprising a wax dispersion according to claim 12.

20. A process for the production of a wax dispersion having a particle size distribution such that 50% of the dispersed wax is <

10 micrometers (μ

m), and having (a) 10-75% by weight, based on the wax dispersion, of a wax phase with a melting point in the range of about 35 to about 50°

C., which comprises at least one oil or wax component selected from the group consisting of 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, and

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

C.

21. The process according to claim 20, further comprising homogenizing the preliminary emulsion at least once before introducing it into the water phase of step (2).

22. The process according to claim 20, further comprising cooling the preliminary emulsion in a heat exchanger before introducing it into the water phase of step (2).

23. The process according to claim 20, wherein the preliminary emulsion also contains a polymer.

24. The process according to claim 23, wherein the polymer is selected from the group consisting of polyacrylates, polysaccharides, polyacrylamides, and mixtures thereof.

25. The process according to claim 20, wherein the preliminary emulsion is introduced into the water phase of step (B) by spraying under pressure through a nozzle.