Production of alkali-soluble, carboxyl-functional aqueous emulsi

Details Production of alkali-soluble, carboxyl-functional aqueous emulsi Production of alkali-soluble, carboxyl-functional aqueous emulsi

1987-06-25

1989-01-31

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

524813, 526287, C08F 224

Patent

active

048016713

ABSTRACT:
There is disclosed a method of carrying out an aqueous emulsion copolymerization to provide an alkali-soluble anionic copolymer having thickening characteristics while minimizing plating and grit problems in which the aqueous emulsion copolymerization of monoethylenically unsaturated monomers comprising from 15% to 50% by weight of carboxyl-functional monomer, at least about 10% by weight of monomer, preferably a urethane monomer, having surfactant characteristics, and the balance of the monomers being selected to provide a water insoluble copolymer, is carried out in the presence of a salt of an aromatic sulfonic acid, such as sodium styrene sulfonate, in an amount of from about 0.1% up to about 6.0%, by weight.

REFERENCES:
patent: 3513120 (1970-05-01), Pohlemann
patent: 3781248 (1973-12-01), Sakai
patent: 4384096 (1983-05-01), Sonnabend
patent: 4600761 (1986-07-01), Ruffner
patent: 4703080 (1987-10-01), Shay

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