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Powdery water-soluble cationic polymer composition

  • US 10,443,192 B2
  • Filed: 08/26/2015
  • Issued: 10/15/2019
  • Est. Priority Date: 08/29/2014
  • Status: Active Grant
First Claim
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1. A powdery water-soluble cationic polymer composition comprising a first cationic polymer and a second cationic polymer;

  • wherein the second cationic polymer is formed by non-radical polymerization;

    wherein the second cationic polymer has a weight-average molecular weight lower than 1 million g/mol;

    wherein the second cationic polymer is polyamine selected from the group consisting of poly(dimethyl-amine(co)epichlorohydrin) and poly(dimethylamine-co-epichlorohydrin-co-ethylene-diamine),wherein the first cationic polymer is formed in the presence of the second cationic polymer by radical adiabatic gel polymerization of an aqueous composition comprising a radically polymerizable cationic monomer, a radically polymerizable nonionic monomer, and the second cationic polymer, wherein the cationic monomer comprises 20 wt-%+/−

    15 wt-% of the monomer units of first cationic polymer and the nonionic monomer comprises 80 wt-%+/−

    15 wt-% of the monomer units of the first cationic polymer,wherein the weight ratio of the first cationic polymer to the second cationic polymer in the composition is within the range of from about 93;

    7 to about 87;

    13, andwherein 999 grams of water having 1 gram of the composition dispersed therein contains not more than 5 ml/l insoluble after stirring at 300 r.p.m. for 60 minutes.

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