Publication number: 20200270506
Abstract: This invention relates to water-soluble or water-swellable polymers, containing a) 25-35 mol. % of one or more recurrent structural units of formula (1), where R1 and R2 represent hydrogen, methyl or ethyl, A represents a linear or branched C1-C12-alkylene, and Q+stands for NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, b) 3 to 8 mol. % of one or more recurrent structural units of formula (2), where R1 represents hydrogen, methyl, or ethyl, X+stands for H+, NH4+, Li+, Na+, K+, ½ Ca++, ½ Mg++, ½ Zn++, ? Al+++, or organic ammonium ions of the formula [HNR5R6R7]+, B is a linear or branched alkylene group with 1 to 6 carbon atoms, and n is a whole number between 0 and 5, and c) 57 to 72 mol. % of a (meth)acrylamide.
Type:
Application
Filed:
May 13, 2020
Publication date:
August 27, 2020
Applicant:
Clariant International Ltd.
Inventors:
Dirk FISCHER, Christoph KAYSER, Claudia DIEMEL, Jürgen TONHAUSER, Michael SCHÄFER