Water resistant personal care polymers

Patent metadata

Field	Value
Publication number	US-9486399-B2
Application number	US-201214366193-A
Country	US
Kind code	B2
Filing date	Dec 11, 2012
Priority date	Dec 22, 2011
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

Described are personal care compositions comprising a polymer comprising: (a) one or more polymer comprising, as polymerized units, (i) 75% to 35% by weight, based on the weight of said polymer, one or more (meth)acrylate monomer selected from at least one of C1-C4 (meth)acrylate, (meth)acrylic acid, styrene, or substituted styrene, and (ii) 25% to 65% by weight, based on the weight of said polymer, one or more hydrophobic monomer, including hydrophobically substituted (meth)acrylate monomers, with alkyl chain length from C8 to C22 and, (iii) optionally crosslinker, and, (b) at least one suncare active. Optionally, the polymer further includes a stage 2 polymer comprising, as polymerized units, (i) 10-99% of one or more monomer which has a Tg of more than 80° C. after polymer formation, (ii) 1-10% of one or more (meth)acrylate monomer containing acid functional group, and (iii) optionally, a crosslinker.

First claim

The invention claimed is:

1. A personal care composition comprising:
(a) a polymer, wherein the polymer comprises, as polymerized units, based on the weight of the polymer: 20 parts by weight butyl acrylate/40 parts by weight ethylhexyl acrylate/38.5 parts by weight methyl methacrylate/1.5 parts by weight methacrylic acid/0.075 parts by weight allyl methacrylate; and
(b) at least one suncare active;

wherein the polymer is formed in a single stage.

2. The personal care composition of claim 1 , wherein the suncare active is at least one of octyl methoxycinnamate, avobenzone, para aminobenzoic acid, homosalate, titanium dioxide, zinc oxide, benzophenones, benzylidenes, octyl crylene, or salicylates.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas
• Rohm & Haas

Inventors

• Zeng Fanwen
• Zhang Li

Classifications

• A61K8/35 Primary

  Ketones, e.g. benzophenone · CPC title

• C08F220/68

  Esters · CPC title

• C08F220/14

  Methyl esters {, e.g. methyl (meth)acrylate} · CPC title

• A61Q17/04

  Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations · CPC title

• A61K2800/48

  Thickener, Thickening system · CPC title