High green strength emulsion rubbers by the use of half-esters o

Details High green strength emulsion rubbers by the use of half-esters o High green strength emulsion rubbers by the use of half-esters o

1982-05-27

1984-05-01

Schofer, Joseph L.

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

Synthetic resins

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

5253296, 5253292, 525366, 525368, C08F 844

Patent

active

044462824

ABSTRACT:
The green strength of polymers produced by emulsion polymerization processes is improved through the use of carboxyl containing compounds. Specifically, the compounds are half esters of unsaturated dicarboxylic acids wherein the half ester moiety renders the carboxyl containing compound hydrophobic. As a result, carboxylic copolymers can be produced in emulsion polymerizations having a basic (pH.gtoreq.7.0) aqueous medium. Heretofore, use of carboxylic acids in emulsion polymerizations have been limited to acidic mediums.

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patent: 3219596 (1965-11-01), Hull et al.
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patent: 3883472 (1975-05-01), Greene et al.
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patent: 4192930 (1980-03-01), Beck et al.

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