04384096 is referenced by 177 patents and cites 5 patents.

Novel aqueous liquid emulsion polymers are prepared by the copolymerization of (A) about 15-60 weight percent of a C.sub.3 -C.sub.8 .alpha.,.beta.-ethylenically unsaturated carboxylic acid monomer, preferably acrylic or methacrylic acid or a mixture thereof with itaconic or fumaric acid, (B) about 15-80 weight percent of a nonionic copolymerizable C.sub.2 -C.sub.12 .alpha.,.beta.-ethylenically unsaturated monomer, preferably a monovinyl ester such as ethyl acrylate or a mixture thereof with styrene, acrylonitrile, vinyl chloride or vinyl acetate, and (C) about 1-30 weight percent of certain nonionic vinyl surfactant esters, such as nonylphenoxypoly(ethyleneoxy).sub.9 ethyl acrylate, to give an emulsion copolymer stable as an aqueous colloidal dispersion at an acid pH lower than about 5.0 but responsive to pH adjustment with base. These emulsion polymers adjusted to a pH of about 5.5 or higher are effective thickeners for a wide variety of aqueous systems including cosmetic products, drilling muds, and particularly aqueous coating compositions such as latex paint.

Title
Liquid emulsion polymers useful as pH responsive thickeners for aqueous systems
Application Number
964113
Publication Number
4384096
Application Date
December 23, 1980
Publication Date
May 17, 1983
Inventor
Lawrence F Sonnabend
Midland
MI, US
Assignee
The Dow Chemical Company
MI, US
IPC
C08F 20/06
C08F 20/28
C08F 20/30
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