Polyimide

Details Polyimide Polyimide

1992-07-10

1994-01-18

Kight, III, John

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

Synthetic resins

From ketone or ketene reactant

528125, 528128, 528172, 528173, 528179, 528185, 528188, 528220, 528350, 528353, C08C 7310, C08C 6926, C08C 802

Patent

active

052801012

ABSTRACT:
The invention relates to a polyimide substantially built up from monomeric units of 3,3',4,4'-benzophenonetetracarboxylic dianhydride and monomeric units of a primary aliphatic diamine. The polyimide according to the invention is characterized in that the primary aliphatic diamine is substantially 1,4-diaminobutane. The thermal stability of the polyimide according to the invention has surprisingly been found to be very good. Owing to this very good thermal stability, the polyimides according to the invention can very well be processed at--relatively--high processing temperatures without any appreciable thermal degradation of the polyimide. As a result, the polyimides processing potential has increased considerably. Also, articles made of the polyimides according to the invention can be used at significantly higher temperatures. Said articles have very good mechanical properties. Articles containing a polyimide are suited for being used in the most diverse applications. Application within a large number of industries may be thought of, such as the electrical, electronic and automotive industries. In space travel, too, the interest in such polyimides is great.

REFERENCES:
patent: 3644168 (1972-02-01), Bonk et al.
patent: 3759913 (1973-09-01), Blackley
patent: 4818603 (1989-04-01), Mueller
CA 92(20): 164392e; "Crystallization of Alkyl-aromatic Polyimides (Polyalkylamimids)", Kurshak, et al.
Macromolecular Reviews vol. 11, J. Poly. Sci., pp. 161-208, "Polyimides", Sroog., (1976).
Hackh's Chemical Dictionary, 4th ed., p. 555.

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