Stabilized sunscreen composition having a particulate inorganic sunscreen
View Patent ↗There is provided a composition. The cosmetic composition has the following: one or more particulates; a neutralized, carboxylic acid polymer selected from the group consisting of a carbomer, acrylates/C 10-30 alkyl acrylate crosspolymer, and any combination thereof; an amount of a polyoxyethylene/polyoxypropylene block copolymer effective to stabilize and maintain dispersion of the one or more particulates; and about 10 wt % to about 90 wt % water. There is also provided a method for making a sunscreen composition. There is also provided a method of stabilizing and maintaining dispersion of particulates in a cosmetic composition.
1. A cosmetic composition, comprising:
one or more particulates;
a neutralized, carboxylic acid polymer selected from the group consisting of a carbomer, acrylates/C 10-30 alkyl acrylate crosspolymer, and any combination thereof;
an effective amount of a polyoxyethylene/polyoxypropylene block copolymer; and
about 10 wt % to about 90 wt % water.
2. The composition of claim 1 , wherein the one or more particulates is an inorganic sunscreen.
3. The composition of claim 2 , wherein the inorganic sunscreen is present in an amount about 2 wt % to about 15 wt % based on the total weight of the composition.
4. The composition of claim 2 , wherein the inorganic sunscreen is present in an amount about 5 wt % to about 10 wt % based on the total weight of the composition.
5. The composition of claim 2 , wherein the particulate inorganic sunscreen is selected from the group consisting of titanium dioxide, zinc oxide, mica, and any combinations thereof.
6. The composition of claim 2 , wherein the inorganic sunscreen is titanium dioxide.
7. The composition of claim 1 , wherein the one or more particulate is a pigment.
8. The composition of claim 1 , wherein the carboxylic acid polymer is a carbomer.
9. The composition of claim 8 , wherein the carbomer is present in an amount about 0.1 wt % to about 4 wt % based on the total weight of the composition.
10. The composition of claim 8 , wherein the carbomer is present in an amount about 0.2 wt % to about 2 wt % based on the total weight of the composition.
11. The composition of claim 1 , wherein the carboxylic acid polymer is an acrylates/C 10-30 alkyl acrylate crosspolymer.
12. The composition of claim 11 , wherein the acrylates/C 10-30 alkyl acrylate crosspolymer is present in an amount about 0.1 wt % to about 4 wt % based on the total weight of the composition.
13. The composition of claim 11 , wherein the acrylates/C 10-30 alkyl acrylate crosspolymer is present in an amount about 0.2 wt % to about 2 wt % based on the total weight of the composition.
14. The composition of claim 1 , wherein the polyoxyethylene/polyoxypropylene block copolymer is present in an amount about 3 wt % to about 20 wt % based on the total weight of the composition.
15. The composition of claim 1 , wherein the polyoxyethylene/polyoxypropylene block copolymer is present in an amount about 5 wt % to about 10 wt % based on the total weight of the composition.
16. The composition of claim 1 , wherein the polyoxyethylene/polyoxypropylene block copolymer is a triblock copolymer.
17. The composition of claim 1 , wherein the water is present in an amount about 20 wt % to about 80 wt % based on the total weight of the composition.
18. The composition of claim 1 , wherein the water is present in an amount about 30 wt % to about 75 wt % based on the total weight of the composition.
19. The composition of claim 1 , wherein the composition is a gel.
20. The composition of claim 1 , wherein the composition is an emulsion.
21. The composition of claim 1 , wherein the composition is an emulsion within a gel.
22. The composition of claim 1 , wherein the one or more particulates is an inorganic sunscreen that is present in an amount about 2 wt % to about 15 wt %, wherein the carboxylic acid polymer is present in an amount about 0.1 wt % to about 4 wt %, wherein the polyoxyethylene/polyoxypropylene block copolymer is a triblock copolymer and is present in an amount about 3 wt % to about 20 wt %, and wherein the water is present in an amount about 20 wt % to about 80 wt %.
23. The composition of claim 22 , wherein the composition is an emulsion within a gel.
24. A method for making a cosmetic composition:
a) adding a carboxylic acid polymer to water and allowing it to hydrate;
b) adding an amount of a basic compound effective to neutralize the carboxylic acid polymer;
c) adding an amount of a polyoxyethylene/polyoxypropylene block copolymer; and
d) dispersing particulates therein, wherein the polyoxyethylene/polyoxypropylene block copolymer is effective to stabilize and maintain dispersion of particulates,
wherein the carboxylic acid polymer is selected from the group consisting of a carbomer, acrylates/C 10-30 alkyl acrylate crosspolymer, and any combination thereof, and wherein the composition has about 10 wt % to about 90 wt % water.
25. The method of claim 24 , wherein the one or more particulates is an inorganic sunscreen.
26. The method of claim 25 , wherein the inorganic sunscreen is present in an amount about 2 wt % to about 15 wt % based on the total weight of the composition.
27. The method of claim 25 , wherein the inorganic sunscreen is present in an amount about 5 wt % to about 10 wt % based on the total weight of the composition.
28. The method of claim 25 , wherein the inorganic sunscreen is selected from the group consisting of titanium dioxide, zinc oxide, mica, and any combinations thereof.
29. The method of claim 25 , wherein the inorganic sunscreen is titanium dioxide.
30. The method of claim 24 , wherein the one or more particulates is a pigment.
31. The method of claim 24 , wherein the carboxylic acid polymer is a carbomer.
32. The method of claim 31 , wherein the carbomer is present in an amount about 0.1 wt % to about 4 wt % based on the total weight of the composition.
33. The method of claim 31 , wherein the carbomer is present in an amount about 0.2 wt % to about 2 wt % based on the total weight of the composition.
34. The method of claim 24 , wherein the carboxylic acid polymer is an acrylates/C 10-30 alkyl acrylate crosspolymer.
35. The method of claim 34 , wherein the acrylates/C 10-30 alkyl acrylate crosspolymer is present in an amount about 0.1 wt % to about 4 wt % based on the total weight of the composition.
36. The method of claim 34 , wherein the acrylates/C 10-30 alkyl acrylate crosspolymer is present in an amount about 0.2 wt % to about 2 wt % based on the total weight of the composition.
37. The method of claim 24 , wherein the polyoxyethylene/polyoxypropylene block copolymer is present in an amount about 3 wt % to about 20 wt % based on the total weight of the composition.
38. The method of claim 24 , wherein the polyoxyethylene/polyoxypropylene block copolymer is present in an amount about 5 wt % to about 10 wt % based on the total weight of the composition.
39. The method of claim 24 , wherein the polyoxyethylene/polyoxypropylene block copolymer is a triblock copolymer.
40. The method of claim 24 , wherein the water is present in an amount about 20 wt % to about 80 wt % based on the total weight of the composition.
41. The method of claim 24 , wherein the water is present in an amount about 30 wt % to about 75 wt % based on the total weight of the composition.
42. The method of claim 24 , wherein the composition is a gel.
43. The method of claim 24 , wherein the composition is an emulsion.
44. The method of claim 24 , wherein the composition is an emulsion within a gel.
45. The method of claim 24 , wherein the one or more particulates is an inorganic sunscreen and is present in an amount about 2 wt % to about 15 wt %, wherein the carboxylic acid polymer is present in an amount about 0.1 wt % to about 4 wt %, wherein the block copolymer is a triblock copolymer and is present in an amount about 3 wt % to about 20 wt %, and wherein the water is present in an amount about 20 wt % to about 80 wt %.
46. The method of claim 45 , wherein the composition is an emulsion within a gel.
47. A method of stabilizing and maintaining dispersion of particulates in a cosmetic composition having a neutralized, carboxylic acid polymer selected from the group consisting of a carbomer, acrylates/C 10-30 alkyl acrylate crosspolymer, and any combination thereof, and about 10 wt % to about 90 wt % water, comprising adding an effective amount of a polyoxyethylene/polyoxypropylene block copolymer.
48. The composition of claim 1 , wherein the one or more inorganic particulates are selected from the group consisting of titanium dioxide and mica.
49. The composition of claim 48 , wherein the composition is a gel.
50. The composition of claim 22 , wherein the one or more inorganic particulates are selected from the group consisting of titanium dioxide and mica.
51. The composition of claim 50 , wherein the composition is a gel.
52. The method of claim 24 , wherein the one or more inorganic particulates are selected from the group consisting of titanium dioxide and mica.
53. The method of claim 52 , wherein the composition is a gel.
54. The method of claim 45 , wherein the one or more inorganic particulates are selected from the group consisting of titanium dioxide and mica.
55. The method of claim 45 , wherein the composition is a gel.