Patent ID: 6117963
Filing Date: 2000-09-12
Classification: C08G

Abstract:
A block copolymer of the general average formula ##STR3## where A=radical R.sup.1, radical D or radical E,R.sup.1 =alkyl radical having from 1 to 30 carbon atoms, substituted alkyl radical, unsubstituted or substituted aryl radical or unsubstituted or substituted alkaryl radical, but with at least 80% of the radicals R.sup.1 being methyl groups,D=radical of the formula--R.sup.2.sub.f --O--(C.sub.2 H.sub.4-g R.sup.5.sub.g O--).sub.n (CH.sub.2 --CH.sub.2 --CH.sub.2 --CH.sub.2-i R.sup.6.sub.i --O--).sub.m R.sup.3whereR.sup.2 is a divalent alkylene radical which may also be branched,f is 0 or 1,g is from 0 to 3,i is 0 or 1,m is from 1 to 30,n is from 0 to 100 andR.sup.3 is hydrogen, an unsubstituted or substituted alkyl radical having from 1 to 6 carbon atoms, an acyl radical or a --O--CO--NH--R.sup.4 radical in which R.sup.4 is an unsubstituted or substituted alkyl or aryl radical,R.sup.5 is a monovalent organic radical which may also be branched or contain ether groups,R.sup.6 is an alkyl radical having 1 to 6 carbon atoms,where at least one radical D has to be present in the average molecule,a is from 3 to 200,b is from 0 to 50, andc is from 0 to 50,E isa) a radical of the general formula--R.sup.2.sub.f --O--(C.sub.2 H.sub.4-g R.sup.5.sub.g O--).sub.n R.sup.3and/orb) an epoxy-functionalized alkyl substituent which may contain heteroatoms and/orc) a monohydroxyalkyl, dihydroxyalkyl or trihydroxyalkyl substituent which may also be aromatic or branched and partially or fully etherified or esterified, and/ord) a halogen- or pseudohalogen-substituted alkyl, aryl or aralkyl radical which may also be branched,provided that there are two or more different polyether copolymer units in the block copolymer.