US2018163346A1PendingUtilityA1

Acrylamide-based polymer, paper strength agent, and paper

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Assignee: HARIMA CHEMICALS INCPriority: Dec 8, 2014Filed: Feb 9, 2018Published: Jun 14, 2018
Est. expiryDec 8, 2034(~8.4 yrs left)· nominal 20-yr term from priority
Inventors:Hirotaka SatoTadaaki HoriiTakanori KuriharaTakahiro FujiwaraKazushige Inaoka
D21H 17/375D21H 21/18D21H 27/10C08F 220/56D21H 17/37C08F 220/34C08F 228/02C08F 220/06
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Claims

Abstract

A papermaking chemical consisting of an aqueous solution of an acrylamide-based polymer, the acrylamide-based polymer being a polymer of a polymer component, wherein the polymer component comprises (meth)acrylamide, a quaternary ammonium-based monomer, and (meth)allylsulfonic acid salt, but does not include either a crosslinkable monomer containing nitrogen, or a tertiary amino-based monomer.

Claims

exact text as granted — not AI-modified
1 . A papermaking chemical consisting of an aqueous solution of an acrylamide-based polymer, the acrylamide-based polymer being a polymer of a polymer component, wherein
 the polymer component comprises
 (meth)acrylamide, 
 a quaternary ammonium-based monomer, and 
 (meth)allylsulfonic acid salt, 
   but does not include either
 a crosslinkable monomer containing nitrogen, or 
 a tertiary amino-based monomer. 
   
     
     
         2 . The papermaking chemical according to  claim 1 , wherein
 the polymer component consists essentially of (meth)acrylamide,   a quaternary ammonium-based monomer, and   (meth)allylsulfonic acid salt.   
     
     
         3 . The papermaking chemical according to  claim 1 , wherein
 the polymer component further contains an anionic polymerizable monomer.   
     
     
         4 . The papermaking chemical according to  claim 3 , wherein
 the polymer component consists essentially of (meth)acrylamide,   a quaternary ammonium-based monomer, (meth)allylsulfonic acid salt, and   an anionic polymerizable monomer.   
     
     
         5 . The papermaking chemical according to  claim 1 , wherein
 the polymer component further contains another polymerizable monomer.   
     
     
         6 . The papermaking chemical according to  claim 1 , wherein
 the quaternary ammonium-based monomer comprises a quaternary compound of dialkylaminoalkyl (meth)acrylamide.   
     
     
         7 . The papermaking chemical according to  claim 1 , wherein
 the quaternary ammonium-based monomer comprises a quaternary compound of a diallyl amine derivative monomer.   
     
     
         8 . The papermaking chemical according to  claim 7 , wherein
 the quaternary compound of a diallyl amine derivative monomer is diallyldimethylammoniumchloride.

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