公开(公告)号：DE3882166D1

公开(公告)日：1993-08-12

申请号：DE3882166

申请日：1988-04-02

Applicant: BASF AG

Inventor： SEELMANN EGGEBERT ,  BOECKH DIETER DR ,  HARTMANN HEINRICH DR ,  TRIESELT WOLFGANG DR

IPC: A01C1/06 ,  A01N25/26 ,  C08F20/02 ,  C08F220/04 ,  C08F220/26 ,  C08F220/28 ,  C08F222/02 ,  C08L101/16

Abstract: Water-soluble copolymer (A) has K value 8-100 (determined by the method of Fikentscher on a 1 wt.% soln. of the Na salt at 25 deg. C and pH 7) and comprises (molar) (a) 15-99% at least one monoethylenically unsatd. 5-6C monocarboxylic acid (I); (b) 0.5-84.5% at least one monoethylenically unsatd. 4-6C dicarboxylic acid (II); (c) 0-20% at least one 2-6C hydroxyalkyl ester (III) of monoethylenically unsatd. 3-6C carboxylic acids; (d) 0-30% other copolymerisable, water-soluble, monoethylenically unsatd. monomers; and (e) 0.5-15% at least one comonomer (IV) with at least 2 ethylenically unsatd., non-conjugated double bonds and at least one COOX gp. (X = H, alkali or alkaline earth metal equiv. or NH4). Specifically, (A) may also include 0.05-10% at least one comonomer, other than (IV), having at least 2 non-conjugated ethylenic double bonds.