Aromatic sulfide/sulfone polymer production

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From sulfur-containing reactant

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Details

528391, C08G 7516, C08G 7520

Patent

active

043012744

ABSTRACT:
Aromatic sulfide/sulfone polymers are prepared by initially contacting a dihaloaromatic sulfone, an alkali metal sulfide, an organic amide, and, optionally, an alkali metal carboxylate under polymerization conditions and subsequently at or near completion of the polymerization reaction, adding an end-capping agent comprising additional dihaloaromatic sulfone to the reaction mixture producing a polymer exhibiting improved physical properties including melt flow stability. The resulting polymers have utility as coatings, films, molded objects, filaments, fibers, and the like.

REFERENCES:
patent: 3790536 (1974-02-01), Vidaurri
patent: 4016145 (1977-04-01), Campbell
patent: 4125525 (1978-11-01), Campbell
patent: 4127713 (1978-11-01), Campbell

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