Polymeric thickeners, processes for their preparation and uses t

Details Polymeric thickeners, processes for their preparation and uses t Polymeric thickeners, processes for their preparation and uses t

1977-02-28

1979-02-06

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296E, 260 334R, 526210, 526317, C08L 3308, C08L 3310

Patent

active

041383818

ABSTRACT:
Polymeric thickeners are provided in preferred compositions which give both good flow and leveling properties as well as sag resistance to coating compositions such as aqueous paints. The thickeners as prepared comprise a polymer dissolved in a solvent at a concentration up to 50% by weight of the composition, the solvent being at least one glycol and containing during manufacture up to 50% by weight, based on the weight of glycol, of water and the polymer consists essentially of (a) about 10 to 98% by weight of at least one unsaturated carboxylic acid of 3 to 6 carbon atoms, (b) about 1 to 50% by weight of at least one alkyl acrylate or alkyl methacrylate wherein the alkyl group is from 1 to 30 carbon atoms, and (c) about 1 to 85% by weight of at least one ester of the formula ##STR1## wherein R and R.sub.2 are each hydrogen or methyl,

REFERENCES:
patent: 3640935 (1972-02-01), Abriss
patent: 3652497 (1972-03-01), Junas et al.
patent: 3708445 (1973-01-01), Junas et al.
patent: 3790520 (1974-02-01), Ludwig
patent: 3794608 (1974-02-01), Evani et al.
patent: 3862075 (1975-01-01), Sekmakas
patent: 3891591 (1975-06-01), Chang et al.
patent: 3894980 (1975-07-01), De Tommaso

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