Melt stable phenylene sulfide/sulfone polymers and method

Details Melt stable phenylene sulfide/sulfone polymers and method Melt stable phenylene sulfide/sulfone polymers and method

1990-04-02

1991-08-13

Foelak, Morton

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

Synthetic resins

Treating polymer containing material or treating a solid...

528388, 528492, 528495, 528496, 528499, C08F 600

Patent

active

050397885

ABSTRACT:
A phenylene sulfide/sulfone polymer with relatively good melt stability and a method of producing such a polymer are provided. A previously produced phenylene sulfide/sulfone polymer is redissolved in N-methyl-2-pyrrolidone to form a solution. This solution is combined with an alcohol to precipitate highly melt stable phenylene sulfide/sulfone polymer in a particulate form. The alcohol has one to four carbon atoms, such as methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, and the like and mixtures thereof.

REFERENCES:
patent: 3354129 (1967-11-01), Edmonds et al.
patent: 3919177 (1975-11-01), Campbell
patent: 3953401 (1976-04-01), Gabler et al.
patent: 4089847 (1978-05-01), Edmonds, Jr. et al.
patent: 4125525 (1978-11-01), Campbell
patent: 4127713 (1978-11-01), Campbell
patent: 4299951 (1981-11-01), Campbell

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