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

1991-06-03

1992-08-11

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263186, 52631845, C08F22018, C08F22006

Patent

active

051380048

ABSTRACT:
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.

REFERENCES:
patent: 2772252 (1956-11-01), Briskin
patent: 2851448 (1958-09-01), Slocombe et al.
patent: 3839308 (1974-10-01), Carrock

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