High temperature aqueous polymerization process

Details High temperature aqueous polymerization process High temperature aqueous polymerization process

1993-09-16

1995-05-02

Nagumo, Mark

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 59, 525404, 525411, 526200, 526209, 526210, 5263171, 526271, 527313, 527314, 528392, C08F28306

Patent

active

054120268

ABSTRACT:
This invention relates to high temperature aqueous processes for the polymerization of monoethylenically unsaturated carboxylic monomers to produce low molecular weight, water-soluble polymer products useful as detergent additives, scale inhibitors, dispersants and crystal growth modifiers. Suitable monomers include acrylic acid, methacrylic acid, maleic acid, maleic anhydride, crotonic acid, and itaconic acid. The reactions are run at temperatures ranging from about 130.degree. C. to 240.degree. C., preferably from about 140.degree. C. to about 230.degree. C. The process can be continuous, semi-continuous, or batch.

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Spychaj, et al., High Temperature Continuous Bulk Copolymerization of Styrene and Acylic Acid: Thermal Behavior of the Reactants, pp. 2111-2119 (see especially p. 2113), 1991, J. Applied Polymer Science, vol. 42.

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