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

1991-02-06

1992-06-16

Schofer, Joseph L.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524833, 524819, 526 81, 52631845, 5263186, 5253302, C08L 3506

Patent

active

051225689

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 simultaneously separating the alcohol/water mixture and adding water to recover a product of less than 25% polymer solids.

REFERENCES:
patent: 3232899 (1966-02-01), Guziak
patent: 3242121 (1966-03-01), Hill
patent: 4628071 (1986-12-01), Morgan

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