Miscible blends of polyimide polymers

Details Miscible blends of polyimide polymers Miscible blends of polyimide polymers

1990-04-25

1992-10-13

Carrillo, Ana L.

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 7908

Patent

active

051551799

ABSTRACT:
Novel polyimide blends are formed of polyimide polymers each having moieties derived from dianhydride and diamine comonomers. The miscible blends of the present invention may be formed by selecting polyimide polymers having structurally different dianhydride-derived moieties, as well as structurally different diamine-derived moieties. More specifically, the blends of this invention include at least one polyimide polymer which is a reaction product of 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride, and 2,2-bis(3-aminophenyl) hexafluoropropane; and at least another polyimide polymer which is a reaction product of 2,2-bis(4-aminophenyl) hexafluoropropane and a dianhydride which is at least one selected from the group consisting of pyromellitic dianhydride, bis(3,4-dicarboxyphenyl) ether dianhydride, and 3,3',4,4'-benzophenone tetracarboxylic dianhydride.

REFERENCES:
patent: 3505168 (1970-04-01), Dunphy et al.
patent: 4107125 (1978-08-01), Lovejoy et al.
patent: 4913759 (1990-08-01), Wright et al.
patent: 4954578 (1990-09-01), Ree et al.
patent: 5055116 (1991-10-01), Kohn et al.

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