Method of controlling the molecular weight of vinyl carboxylic a

Details Method of controlling the molecular weight of vinyl carboxylic a Method of controlling the molecular weight of vinyl carboxylic a

1978-03-27

1979-03-06

Wong, Jr., Harry

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

Synthetic resins

Polymerizing in tubular or loop reactor

526240, 526303, C08F22006, C08F22238

Patent

active

041432223

ABSTRACT:
The molecular weight of acrylic acid-acrylamide copolymers can be controlled between the range of 3,000-300,000 by polymerizing an aqueous solution of these comonomers in a tube reactor at a pressure between 50-350 psig in the presence of a free radical catalyst and with the following reaction parameters being specified; monomer solids, initiation temperature, monomer pH, initiator concentration, acrylic acid-acrylamide monomer ratio, and residence time in the reactor.

REFERENCES:
patent: 3035033 (1962-05-01), Schweitzer et al.
patent: 3658772 (1972-04-01), Volk et al.
patent: 3872063 (1975-03-01), Kim
patent: 3929739 (1975-12-01), Barabas et al.

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