Melt stabilization of poly arylene sulfide ketone

Details Melt stabilization of poly arylene sulfide ketone Melt stabilization of poly arylene sulfide ketone

1988-11-16

1990-01-09

Anderson, Harold D.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528226, 528388, 528481, 528488, 528503, C08G 600, C08G 7516

Patent

active

048929298

ABSTRACT:
Melt stable polymeric resins are provided by process which comprises heating a first particulate resin selected from the group consisting of poly(arylene sulfide ketone) and poly(arylene sulfide diketone), while in the presence of a gaseous oxidizing atmosphere, to a temperature at least about 150.degree. C. (302.degree. F.) but below the melting point of the first particulate resins, for time sufficient to produce a second particulate resin. The thermal stability of the second particulate resin is superior to that of its respective first particulate resin is superior to that of its respective first particulate resin. Moreover, the molecular weight of the second particulate resin is greater than that of its respective first particulate resin.

REFERENCES:
patent: 3317487 (1967-05-01), Smith
patent: 3354129 (1967-11-01), Edmonds et al.
patent: 3524835 (1970-08-01), Edmounds et al.
patent: 3717620 (1973-02-01), Rohlfing
patent: 3793256 (1974-02-01), Scoggin et al.
patent: 4274993 (1981-06-01), Narisawa et al.
patent: 4590104 (1986-05-01), Zeiner et al.

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