C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/296, 402/406
C08F 222/02 (2006.01) A61K 47/32 (2006.01) C08F 220/04 (2006.01) C09D 7/00 (2006.01) C09D 7/12 (2006.01) C09K 8/62 (2006.01) C09K 8/64 (2006.01) C11D 3/37 (2006.01) D06P 1/52 (2006.01) G02B 6/44 (2006.01)
Patent
CA 1230700
- i - PATENT APPLICATION OF CHING-JEN CHANG AND TRAVIS E. STEVENS for ALXYL ACRYLAMIDE-CONTAINING EMULSION COPOLYMERS FOR THICKENING PURPOSES ABSTRACT There are disclosed stable, aqueous dispersions of water-insoluble emulsion copolymers of (1) about 10-70% by weight of methacrylic or acrylic acid, (2) about 0.5-25% by weight of an N-alkyl acrylamide, and (3) at least 25% by weight, to a total of 100%, 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 emulsion 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.
436920
Chang Ching-Jen
Stevens Travis E.
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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