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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.:

US 10907307 B1

PDFFull Text
Date of Patent:
Feb. 02, 2021

Filed:

Dec. 28, 2016

Cationic surface sizing agent

Applicant:

Kemira Oyj, Helsinki, FI;

Inventors:

Anneli Lepo, Tampere, FI;

Elsi Turunen, Espoo, FI;

Tarja Turkki, Helsinki, FI;

Assignee:

KEMIRA OYJ, Helsinki, FI;

Attorney:

Buchanan Ingersoll & Rooney PC

Primary Examiner:

Dennis R Cordray

Int. Cl.
CPC ...
D21H 21/16 (2006.01); D21H 17/45 (2006.01); D21H 13/08 (2006.01); C08F 220/34 (2006.01); C08F 220/64 (2006.01); C08F 220/66 (2006.01); C08F 267/02 (2006.01); C08F 2/22 (2006.01); C08F 212/08 (2006.01); C08F 257/02 (2006.01); D21H 17/37 (2006.01); D21H 23/56 (2006.01); C08K 3/20 (2006.01); C08F 220/18 (2006.01);
U.S. Cl.
CPC ...
D21H 21/16 (2013.01); C08F 2/22 (2013.01); C08F 212/08 (2013.01); C08F 220/34 (2013.01); C08F 220/64 (2013.01); C08F 220/66 (2013.01); C08F 257/02 (2013.01); D21H 13/08 (2013.01); D21H 17/37 (2013.01); D21H 17/375 (2013.01); D21H 17/45 (2013.01); D21H 17/455 (2013.01); D21H 23/56 (2013.01); C08F 220/1804 (2020.02); C08K 3/20 (2013.01);
Abstract

Provided herein is an aqueous polymer dispersion (A) obtainable by free radical emulsion copolymerizing a first ethylenically unsaturated monomer blend having 15 to 100% by weight of at least one C1-C4-alkyl (meth)acrylate, in the presence of a water-soluble redox system having a first free radical initiator for free radical emulsion copolymerization and an aqueous prepolymer composition (B) obtainable by free radical emulsion copolymerizing in a polymerization solvent having C1-6-carboxylic acid and C1-6-carboxylic acid anhydride a second ethylenically unsaturated monomer blend with 5 to 50% by weight of at least one ethylenically unsaturated quaternary amine, and 10 to 95% by weight of at least one optionally substituted styrene, in the presence of a second free radical initiator.

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