Production of particulate polyimide polymers

Details Production of particulate polyimide polymers Production of particulate polyimide polymers

1990-05-14

1991-08-13

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528229, 528342, 528353, C08G 802

Patent

active

050397761

ABSTRACT:
Fusible polyimide powders are prepared by the process of this invention. An amic acid amine is first prepared by treating equimolar amounts of a 2,2-bis[4-(aminophenoxy)phenyl]-hexafluoropropane with an unsaturated carbocyclic monoanhydride. The amic acid amine is then mixed with an aromatic tetracarboxylic dianhydride and the mixture heated to form a polyimide precursor. A chemical dehydrating agent is added in an amount sufficient to substantially, fully imidize the precursor. The resulting fusible polyimide powder is finally separated.

REFERENCES:
patent: 3708459 (1973-01-01), Lubowitz
patent: 4173700 (1979-11-01), Green et al.
patent: 4883718 (1989-11-01), Ohta et al.
patent: 4913759 (1990-04-01), Wright
patent: 4923954 (1990-05-01), Klobucar et al.
patent: 4931531 (1990-06-01), Tamai et al.

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