C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/5410, 117/70
C08L 25/00 (2006.01) C08L 33/06 (2006.01) C09D 125/14 (2006.01) C09D 133/08 (2006.01) C09D 133/24 (2006.01)
Patent
CA 1108332
ABSTRACT OF THE DISCLOSURE The invontion relates to a novel method of preparing aqueous polymeric colloids comprising the steps of (a) polymerization in organic solvent at high concentration of monomers consisting of 15 to 60% of aromatic vinyl monomer 20 to 50% of a 1ong chain acrylate ester monomer 3 to 30% of at least one compound having the formula Image wherein R1 is hydrogen or methyl, R2 is amino or hydroxyalkoxy and R3 is alkoxyalkyl or hydrogen, and 0 to 12% of unsaturated cnrboxylic acid monomer, said acid producing a water insolubte polymer (b) emulsification of the resultant polymer solution in water using small proportion of surfactant. The pH of the resulting solution is adjustedd to 6.5 to 10 with amines. The structure of the polymers in the present invention is highly hydrophobic so that, even at full neutralization of the carboxylic acid groups with amines, it would not producs an aqueous solution. In the absence of surfactant, a stable colloidal emulsion cannot be attained. The product is useful as an aqueous coating composition for tho interior and/or exterior coating of food, beer, beverage and other metal containers. The emulsions can be easily applied by spraying or direct roller coating and baked to give films of outstanding properties.
284457
Fetherstonhaugh & Co.
Whittaker Corp.
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