The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1998
Filed:
Mar. 13, 1997
Joachim Carl, Darmstadt, DE;
Peter Quis, Darmstadt, DE;
Manfred Braum, Mainz, DE;
Wolfram Desch, Weiterstadt, DE;
Roehm GmbH Chemische Fabrik, Darmstadt, DE;
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.