Abstract: The present invention provides a process for polymerizing diallyldialkyl ammonium compounds to produce polymers with increased molecular weight in which the polymerization is carried out in an aqueous medium containing an inorganic salt and a water soluble free radical initiator that does not react with the inorganic salt or the halide counterion of the diallyldialkyl ammonium halide compound to form a chain transfer or chain terminating agent.

Abstract: The present invention provides a process for polymerizing diallyldialkyl ammonium compounds to produce polymers with increased molecular weight in which the polymerization is carried out in an aqueous medium containing an inorganic salt and a water soluble free radical initiator that does not react with the inorganic salt or a counterion of the diallyldialkyl ammonium compound to form a chain transfer or chain terminating agent.

Abstract: There is disclosed an aqueous emulsion copolymer which provides an alkali-soluble anionic copolymer providing antisettling and antisag thickening characteristics especially useful in textured latex paints. The copolymers comprise an aqueous emulsion copolymer of:(A) about 10-60 weight percent of an alpha, beta-monoethylenically unsaturated carboxylic acid;(B) about 20-80 weight percent of a non-reactive monoethylenically unsaturated monomer which provides a water-insoluble copolymer;(C) about 0.5-40 weight percent of a monoethylenically saturated, hydrophobic nonionic monomer which is the reaction product of a monohydric or monoamine-terminated polypropoxylated or polybutoxylated hydrophobe with a monoethylenically unsaturated monomer having a single group which is reactive under the conditions employed; and(D) from 0 up to about 2 weight percent of a polyethylenically unsaturated monomer.

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.

Abstract: Nonionic associative thickeners suitable for use in aqueous coating compositions comprise an aqueous solution polymer of (a) from about 40 percent to about 98 percent, preferably from 60 to 95 percent, by weight of a monoethylenically unsaturated monomer such as acrylamide, N,N-dimethyl acrylamide, vinyl pyrrolidone, hydroxyethyl acrylate and mixtures thereof; and (b) from about 2 percent to about 60 percent, preferably from 5 to 40 percent, by weight of a nonionic urethane monomer which is the urethane reaction product of a monohydric nonionic surfactant with a monoethylenically unsaturated monoisocyanate.