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Title: Method of controlling the molecular weight of vinyl carboxylic acid-acrylamide copolymers

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.


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Inventors: Goretta, Louis A. (Naperville, IL, US)
Otremba, Robert R. (Chicago, IL, US)

Application Number: 890107
Filing Date: 1978-03-27
Publication_date: 1979-03-06
Assignee: Nalco Chemical Company (Oak Brook, IL)
Primary Class(es): 526/64 210/701, 526/240
Other Classes:
US Patent Ref:
3035033May, 1962Schweitzer et al.526/64.
3658772Apr, 1972Volk et al.526/303.
3872063Mar, 1975Kim526/303.
3929739Dec, 1975Barabas et al.526/303.

Other Refs:
Primary Examiner: Wong, Jr., Harry
Assistant Examiner:
Attorney: Premo; John G., Miller; Robert A.