Cationic surface sizing agent and paper coated with the same

Details Cationic surface sizing agent and paper coated with the same Cationic surface sizing agent and paper coated with the same

2011-08-02

2011-08-02

Hug, Eric (Department: 1741)

Paper making and fiber liberation

Processes and products

With coating after drying

C162S168100, C162S168200, C162S169000, C427S391000, C526S307000, C526S310000, C526S312000, C526S319000

Reexamination Certificate

active

07988826

ABSTRACT:
The invention improves a sizing effect even on paper containing no internal sizing agent and improves productivity by making solution polymerization in a small amount of an organic solvent. The invention provides a cationic surface sizing agent composed of a copolymer obtained by solution polymerization of (a) 15 to 35% by weight of a tertiary amino group-containing monomer, (b) 30 to 85% by weight of C1to C4alkyl(meth)acrylate, and (c) 1 to 50% by weight of styrenes in an organic solvent in the presence of a chain transfer agent. The copolymer may be subjected to cationization treatment with a quaternization agent. As a constituent monomer of the copolymer, 0 to 20% by weight of another copolymerizable vinyl monomer (d) may be contained. The cationic surface sizing agent is applied to paper.

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