Co-reagent stabilization of poly(aryl ether sulfones) using sodi

Details Co-reagent stabilization of poly(aryl ether sulfones) using sodi Co-reagent stabilization of poly(aryl ether sulfones) using sodi

1987-12-29

1989-08-08

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528219, C08G 802, C08G 1400

Patent

active

048553883

ABSTRACT:
Described herein is a method for preventing molecular weight degradation in the preparation of poly(aryl ether sulfones) by nucleophilic displacement polycondensation reactions. This method comprises the addition of an effective amount of a sodium, lithium, alkaline earth or lanthanide metal salt to the polycondensation reaction to control the molecular weight of the poly(aryl ether sulfone).

REFERENCES:
patent: 4320224 (1982-03-01), Rose et al.

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