Patent ID: 7375163
Filing Date: 2008-05-20
Classification: C04B,C08F,C08L

Abstract:
1. A polymer comprising side chains of which at least 10 weight-% can be cleaved in alkaline medium at a pH of from 8-14 at 20° C., said side chains being connected to the backbone of said polymer by ester and optionally amide and/or imide groups, whereby said polymer comprises: a mol % of structural unit A of formula (I) b mol % of structural unit B of formula (II) c mol % of structural unit C of formula (III) d mol % of structural unit D of formula (IV) and e mol % of structural unit E of formula (V) wherein each R1 independently from each other represents a hydrogen atom or a methyl group or mixtures thereof; M represents a hydrogen atom, a metallic cation, an ammonium or organic ammonium cation or mixture thereof; R2, R20 and R3 independently from each other represent a C at least one of R4 and R5 represent independently from each other a hydrogen atom or a substituent as defined for R2, and R4 and R5 may form together a ring structure of which N is part of, this ring structure may further contain other hetero atoms like another nitrogen, sulfur or oxygen atom, or mixtures thereof, and wherein at least one of R4 and R5 represents (R7O) R6 is a single bond or a methylene group, a, b, c, d and e represent numbers where the sum of a+b+c+d+e=100 and b is a number from 10-90, c is a number from 0-85, d is a number from 0-50 and e is a number from 0-10 and a is 100−(b+c+d+e), whereby a is at least 5, and wherein the sum of e and d is a value of more than 0.