Basf Se Corporation

James Goodwin

Stefano Scialla

Dieter Hannu Boeckh

Aaron Flores-Figueroa

Rainer Dobrawa

Frank Huelskoetter

Martin Ruebenacker

Markus Brym

Melissa Cuthbertson

Glenn Ward

Markus Willi Konrad Brym

A copolymer which comprises, in copolymerized form, (A) 60 to 99% by weight of at least one monoethylenically unsaturated polyalkylene oxide monomer of the formula I (I) in which the variables have the following meanings: X is &#x2014;CH&#x2014; or &#x2014;CO&#x2014;, if Y is &#x2014;O&#x2014;; is &#x2014;CO&#x2014;, if Y is &#x2014;NH&#x2014;; Y is &#x2014;O&#x2014; or &#x2014;NH&#x2014;; Ris hydrogen or methyl; Rare identical or different C-C-alkylene radicals, which may be arranged blockwise or randomly; Ris hydrogen or C-C-alkyl; n is an integer from 25 to 75, (B) 1 to 40% by weight of at least one quaternized nitrogen-containing monoethylenically unsaturated monomer selected from the group consisting of monomers of formula Ha to IId (Ha-IId) in which the variables have the following meanings: R is C-C-alkyl or benzyl; R' is hydrogen or methyl; Y is &#x2014;O&#x2014; or &#x2014;NH&#x2014;; A is C-C-alkylene; X&#x2014; is halide, C-C-alkyl sulfate, C-C-alkylsulfonate and Ci-C4-alkyl carbonate, (C) 0 to 10% by weight of anionic monoethylenically unsaturated monomers, and (D) 0 to 30% by weight of other nonionic monoethylenically unsaturated monomers and has an average molecular weight Mw of &#x3e;100,000.

Copolymers comprising polyalkylene oxide groups and quaternary nitrogen atoms

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Cincinnati, OH, United States of America

James Goodwin