Crosslinked water-soluble polymer dispersions

US5840804A · kind A · utility

Assignee

• Roehm GmbH Chemische Fabrik · DE

Inventors

• Joachim Carl · Stein, DE
• Peter Quis · Darmstadt, DE
• Manfred Braum · Mainz, DE
• Wolfram Desch · Weiterstadt, DE

Key dates

• Filing date: Mar 13, 1997
• Grant date: Nov 24, 1998
• Expiry date: Mar 13, 2017

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/455
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method of producing low-viscosity water-based water-soluble polymer dispersions having a high concentration of the principal substance is achieved by polymerizing the following monomer components, (a1) 50-99.999 wt. % of at least one water-soluble monomer; (a2) 0.001-1 wt. % of at least one crosslinking monomer with at least two ethylenically unsaturated radically polymerizable groups; (a3) 0-30 wt. %, particularly 1-25 wt. %, of at least one hydrophobic monomer; and (a4) 0-25 wt. %, particularly 0.1-15 wt. %, of at least one amphiphilic monomer, in aqueous solution, in the presence of at least one polymer dispersant, to form a polymer (A), where the sum of the amounts of the components represented by the monomers (a1), (a2), (a3), and (a4) is 100 wt. % of the monomers, the weight average molecular weight of the resulting polymer (A) is at least 500,000 Dalton, and polymer (A) is incompatible with the dispersant.