Styrene/acrylic-type polymers for use as surface sizing agents

Details Styrene/acrylic-type polymers for use as surface sizing agents Styrene/acrylic-type polymers for use as surface sizing agents

C - Chemistry, Metallurgy

08

F

C08F 212/08 (2006.01) C08F 212/04 (2006.01) C08F 220/02 (2006.01) C08F 220/06 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2060631

A process is disclosed for the preparation of styrene/acrylic type polymers which are useful in the sizing of paper. The process comprises polymerizing the monomers in an alcohol/water mixture at reflux temperature in the presence of a free-radical generating catalyst. The catalyst is added portion-wise over the course of the reaction and the resultant polymer is neutralized while substantially simulaneously separating the alcohol/water mixture and adding water to recover a product of less than 25% polymer solids.

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