SIZING OF PAPER BY USING LIQUID DISPERSING LOW MOLECULAR WEIGHT LATEX OBTAINED BY COPOLYMERIZING HYDROPHOBIC MONOMER AND STYRENE/MALEIC ANHYDRIDE COPOLYMER

摘要

PROBLEM TO BE SOLVED: To provide the subjective method for sizing paper by which the paper having sufficient wet strength is obtained even from mechanical pulp (ground pulp), 100% reclaimed pulp and partially reclaimed pulp by using a specific latex as a base. ;SOLUTION: A surface of paper is sized by a latex-dispersing liquid obtained by an emulsion polymerization of a mixture of styrene and a (meth)acrylic ester in an aqueous solution of an amphipathic copolymer of a hydrophobic monomer (e.g. styrene) and a hydrophilic monomer having carboxyl group (e.g. maleic anhydride) (having 500-5,000 molecular weight and being water-soluble or water-dispersable) in the presence of an initiator for the radical polymerization in the method for sizing the paper.;COPYRIGHT: (C)1998,JPO