Processes for the preparation of polymeric thickeners and uses thereof
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United States of America Patent
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Oct 28, 1980
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app pub date -
Sep 28, 1978
filing date -
Sep 28, 1978
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Abstract
Processes for preparing polymeric thickeners are provided which give, in preferred compositions, both good flow and leveling properties as well as sag resistance to coating compositions such as aqueous paints. The thickeners are prepared by conducting the polymerization in glycol such as ethylene glycol or propylene glycol with or without a little added water. The monomers polymerized consist essentially of (a) about 1-99% by weight of at least one unsaturated carboxylic acid of 3 to 6 carbon atoms, and (b) about 99-1% by weight of at least one ester of the formula ##STR1## wherein R and R.sub.2 are each hydrogen or methyl, x is a positive integer of 5 to 80, y is an integer of 0 to 20, and R.sub.1 is alkyl of 1 to 20 carbon atoms or alkyl phenyl where the alkyl group is from 1 to 20 carbon atoms.
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