Blends of polyether sulfones and polyimides

Details Blends of polyether sulfones and polyimides Blends of polyether sulfones and polyimides

1991-09-30

1993-03-02

Bleutge, John C.

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

Synthetic resins

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

525436, C08L 7700, C08L 7706

Patent

active

051910357

ABSTRACT:
Blends of a polyether sulfone and the polyimide of the dianhydride sulfonyl bis(phthalic anhydride) ("SPAN") and the diamine 1,4-bis(p-aminocumyl)benzene ("BAP"). The blends will comprise from about 10 to about 90 wt % polyether sulfone, preferably greater than about 50 wt % polyether sulfone, based on the total weights of polyether sulfone and polyimide. The blends exhibit good toughness and improved thermal performance over polyether sulfone alone while remaining readily processable, and have good mechanical properties including unexpectedly high stiffness as determined by high tensile modulus values. Blends of this invention also are surprisingly miscible, defined as exhibiting a single Tg value.

REFERENCES:
patent: 3658938 (1972-04-01), Kwiatkowski et al.
patent: 4503168 (1985-03-01), Hartsing, Jr.
patent: 4713438 (1987-12-01), Harris et al.
patent: 5013799 (1991-05-01), Giles, Jr. et al.
patent: 5036146 (1991-07-01), Hedtmann-Rein et al.
patent: 5037902 (1991-08-01), Harris et al.
patent: 5071925 (1991-12-01), Rostami
patent: 5079308 (1992-01-01), Harris et al.

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