Inventors:
Lawrence F. Sonnabend - Midland MI
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C08F 2030
C08F 2028
C08F 2006
Abstract:
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.