Polyetherketonimides

Details Polyetherketonimides Polyetherketonimides

1992-07-24

1993-11-09

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528128, 528170, 528171, 528172, 528173, 528183, 528185, 528188, 528220, 528229, 528351, 528352, 528353, C08G 802, C08G 1400, C08G 7310, C08G 6926

Patent

active

052604047

ABSTRACT:
Polyetherketoneimides and copolymers thereof having an imide repeat unit of formula ##STR1## wherein Ri is ##STR2## in which A is a direct bond or --O--or another substantially non-electron-withdrawing group, and/or Ra is an at least partly arylene moiety other than m- or P-phonylene.
These polymers tend to have improved melt stability and other properties, especially when made from a pre-existing imide monomer, instead of by the known amic acid route which results in uncyclised amic acid residues in the polymer.

REFERENCES:
patent: 4820791 (1989-04-01), Hergenrother et al.
patent: 4868271 (1989-09-01), Dahl et al.
Hergenrother & Havens, "New Semi-Crystalline Polymides", paper presented at The Interdisciplinary Symposium on Recent Advances in Polyimides and Other High Performance Polymers, Reno, Nevada, 1987.

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