C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/4706, 134/56
C08F 222/02 (2006.01) A61K 8/81 (2006.01) A61K 8/86 (2006.01) A61K 47/00 (2006.01) A61Q 19/00 (2006.01) C08F 220/04 (2006.01) C08F 222/20 (2006.01) C09D 7/00 (2006.01) C09K 8/035 (2006.01) D06P 1/52 (2006.01)
Patent
CA 1242826
-1- PATENT APPLICATION OF CHING-JEN CHANG AND TRAVIS E. STEVENS for PROCESS FOR THICKENING WITH COPOLYMERS OF ALKYL POLY(OXYALKYLENE) ITACONATES ABSTRACT There is disclosed a process of thickening an aqueous system comprisins adding to the system aqueous dispersions of water- insoluble emulsion copolymers of (1) about 10-70% by weight of (meth)acrylic acid or itaconic acid, (2) about 0.5-25% by weight of an alkyl poly(oxyethylene) itaconate, and (3) at least 25% by weight, of a C1-C4 alkyl (meth)acrylate, and, optionally, included in the total monomer mixture a small amount of (4) about 0.05-1% by weight of a polyethylenically unsaturated monomer. The copolymers, when neutralized and solubilized by addition of an alkali, are high efficiency thickeners for aqueous systems and have improved tolerance to ionic or electrolyte content. Typical systems that can be thickened are paint latices, cosmetic preparations, food preparations, ionic detergents, dye pastes for textiles, pharmaceuticals, and oil well drilling muds. Surfactants enhance the thickening properties afforded by the copolymers.
440367
Chang Ching-Jen
Stevens Travis E.
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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