| 摘要 |
PURPOSE:To obtain the title sizing agent having good sizing effect and re- defibration property by copolymerizing styrenes with a N,N'-dialkylaminoalkyl ester of (meth)acrylic acid, non-crosslinked quaternary material thereof and alkyl ester thereof and then adding water thereto. CONSTITUTION:A copolymer is prepared by subjecting a monomer mixture consisting of (A) 50-98.5mol% styrenes, (B) 0.1-9.9% (meth)acrylic acid, N,N'- dialkylaminoalkyl ester or salt thereof, (C) 0.1-10% non-crosslinked type quaternary compound of N,N'-dialkylaminoalkyl ester or salt thereof and (D) 0-48.5% (meth)acrylic acid alkyl ester to solution polymerization or bulk polymerization in total amount of the components B and C of 1.5-10% and then water is added to the copolymer to provide the aimed sizing agent containing the resultant cationic high polymer emulsion as an active ingredient. |
