SELF ADAPTING POLYMERS FOR ANHYDROUS SUNSCREEN FORMULATIONS

• US 20130243703A1
• Filed: 02/04/2011
• Published: 09/19/2013
• Est. Priority Date: 02/04/2010
• Status: Active Grant

• Current Assignee: Isp Investments LLC (Ashland Global Holdings, Inc.)
• Original Assignee: Hercules Incorporated (Ashland Global Holdings, Inc.), ISP Investments, Inc. (Ashland Global Holdings, Inc.), Ashland Licensing and Intellectual Property Llc, The Aqualon Company (Bank of Montreal)
• Inventors: Barrett, Christine M., Fares, Hani M., Ross, Tracey, Guerrero, Rita Marie, Prettypaul, Donald I.
• Granted Patent: US 10,729,625 B2
• Time in Patent Office: Days
• US Class Current: 424/59
• CPC Class Codes: A61K 2800/31 Anhydrous
• CPC Class Codes: A61K 2800/54 Polymers characterized by specific structures/properties
• CPC Class Codes: A61K 8/18 characterised by the composition
• CPC Class Codes: A61K 8/35 Ketones, e.g. benzophenone
• CPC Class Codes: A61K 8/8164 Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical, and containing at least one other carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers, e.g. poly (methyl vinyl ether-co-maleic anhydride)
• CPC Class Codes: A61K 8/8182 Copolymers of vinyl-pyrrolidones. Compositions of derivatives of such polymers
• CPC Class Codes: A61Q 17/04 Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations

Abstract

Compositions comprising sun-care actives and self adapting polymers are disclosed. Self adapting polymers align themselves with the hydrophilic group pointing to the surface during application thus delivering an aesthetically pleasing surface to the consumers with a pleasant after feel. These polymers then rearrange upon contact with water so that the hydrophobic groups now point to the surface which then increases the water resistance of the formulation.

Claims

1. An anhydrous composition comprising a sun-care active and a self adapting polymer wherein the composition exhibits an increase in hydrophobicity after contact with water.

2. The composition according to claim 1, wherein the sun-care active is selected from the group consisting of UV-A sunscreens, UV-B sunscreens, physical sun blockers and combinations thereof.

3. The composition according to claim 1, wherein the sun-care active is selected from the group consisting of avobenzone, benzophenone-3, p-Aminobenzoic acid (PABA), Camphor benzalkonium methosulfate, Phenylbenzimidazole sulfonic acid, Terephthalidene dicamphor sulfonic acid, Benzylidene camphor sulfonic acid, Octocrylene, Polyacrylamidomethyl benzylidene camphor, Ethylhexyl methoxycinnamate, PEG-25 PABA, Isoamyl p-methoxycinnamate, Ethylhexyl triazone, Drometrizole trisiloxane, Diethylhexyl butamido triazone, 4-Methylbenzylidene camphor, 3-Benzylidene camphor, Ethylhexyl salicylate, Ethylhexyl dimethyl PABA, Benzophenone-4, Benzophenone-5, Methylene bis-benztriazolyl tetramethylbutylphenol, Disodium phenyl dibenzimidazole tetrasulfonate, Bis-ethylhexyloxyphenol methoxyphenol triazine, Polysilicone-15, cerium oxides, chromium oxides, cobalt oxides, iron oxides, red petrolatum, silicone-treated titanium dioxide, titanium dioxide, zinc oxide, and zirconium oxide and acid, salts, esters, derivatives and combinations thereof.

4. The composition according to claim 1, having an SPF of at least about 10.

5. The composition according to claim 1, wherein the polymer is selected from the group consisting of a vinyl caprolactam/VP/dimethylaminoethyl methacrylate copolymer, a VP/vinylcaprolactam/DMAPA acrylates copolymer, a vinylcaprolactam/VP/dimethylaminoethyl methacrylate/octyl acrylamide copolymer, a VA/butyl maleate/isobornyl acrylate copolymer and combinations thereof.

6. The composition according to claim 5, wherein the polymer comprises VA/butyl maleate/isobornyl acrylate copolymer.

7. The composition according to claim 1, wherein said one or more sun-care actives are present in an amount of about 1 wt. % to about 50 wt. % of the total weight of the composition.

8. The composition according to claim 1, wherein said polymer is about 0.05 wt. % to about 10 wt. % of the total weight of the composition.

9. The composition according to claim 8, wherein said polymer is about 0.5 wt. % to about 2 wt. % of the total weight of the composition.

10. The composition according to claim 1, wherein said composition comprises an anhydrous solvent.

11. The composition according to claim 1, wherein the composition comprises less than 10% water.

12. The composition according to claim 11, wherein the composition is free of water.

13. The composition according to claim 1, wherein the composition exhibits an increase in contact angle of at least 5°

after immersion in water.

14. The composition according to claim 1, wherein the composition exhibits a percent increase in boost of at least 50% as compared to control compositions that do not contain the polymer.

15. The composition according to claim 1 further comprising one or more additional components selected from the group consisting of skin-feel additives, moisturizing agents film former/waterproofing agents, pH adjuster/chelating agents, emulsifiers, preservatives, and mixtures thereof.

16. The composition according to claim 1 in the form of a sprayable composition.

17. A method for protecting skin or hair from the effects of UV radiation comprising applying a composition in accordance with claim 1 to said skin or hair.

18. A method for enhancing the SPF-value of a sun-care active in UV-photoprotecting sun-care compositions comprising admixing a polymer selected from the group consisting of a vinyl caprolactam/VP/dimethylaminoethyl methacrylate copolymer, a VP/vinylcaprolactam/DMAPA acrylates copolymer, a vinylcaprolactam/VP/dimethylaminoethyl methacrylate/octyl acrylamide copolymer, a VA/butyl maleate/isobornyl acrylate copolymer and combinations thereof with a sun-care composition comprising an anhydrous solvent and a sun-care active in an amount effective to enhance the SPF value of said sun-care active.