water soluble, copolymerisate containing carboxylic groups, process for their manufacture and their use as scaleinhibitor

摘要

PCT No. PCT/EP94/02721 Sec. 371 Date Feb. 20, 1996 Sec. 102(e) Date Feb. 20, 1996 PCT Filed Aug. 16, 1994 PCT Pub. No. WO95/06074 PCT Pub. Date Mar. 2, 1995Water-soluble copolymerizates are disclosed containing carboxyl groups, and also containing the following components incorporated by polymerization: (a) 30 to 80 mol % monoethylenically unsaturated C3-C8 carboxylic acids, anhydrides thereof and/or water-soluble salts thereof; (b) 10 to 50 mol % C2-C8 olefines, styrene, alkyl styrene, C1-C10 alkyl vinyl ethers and/or vinyl esters of saturated C1-C10 monocarboxylic acids; and (c) 0.01 to 20 mol % vinyl ethers and/or allyl ethers of alkoxylated C1-C30 alcohols. The copolymerizates in question have a K-value of at least 8 (determined after H. Fikentscher). Also disclosed are methods of producing the water-soluble copolymerizates by copolymerization of the monomers in the presence of radical-forming polymerization initiators, and the use of the polymerizates as scale inhibitors.