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:
Sep. 25, 2018
Filed:
Nov. 17, 2015
Applicant:
Kemira Oyj, Helsinki, FI;
Inventors:
Assignee:
Kemira Oyj, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 120/56 (2006.01); C02F 11/14 (2006.01); C08F 2/10 (2006.01); C08F 2/32 (2006.01); C08F 220/56 (2006.01); C08F 6/00 (2006.01); D21H 17/37 (2006.01); D21H 21/10 (2006.01); C02F 1/56 (2006.01); C08F 4/40 (2006.01);
U.S. Cl.
CPC ...
C08F 120/56 (2013.01); C02F 1/56 (2013.01); C02F 11/14 (2013.01); C08F 2/10 (2013.01); C08F 2/32 (2013.01); C08F 6/008 (2013.01); C08F 220/56 (2013.01); D21H 17/375 (2013.01); D21H 21/10 (2013.01);
Abstract
The invention relates to a method for preparing a dry cationic hydrogel polymer product. The method comprises polymerization of a reaction mixture comprising ethylenically unsaturated monomers in presence of water and initiator(s) by radical polymerization and obtaining a hydrogel polymer. The hydrogel polymer is comminuted by chopping or shredding, and dried, whereby a dry hydrogel polymer product in powder form is obtained. At least one cationic reverse phase emulsion polymer is added to the hydro polymer at the comminuting step. The invention relates also to a dry cationic hydrogel polymer composition prepared by the method and its use.