Soluble pseudo rod-like polyimides having low coefficient of the

Details Soluble pseudo rod-like polyimides having low coefficient of the Soluble pseudo rod-like polyimides having low coefficient of the

1991-10-29

1993-01-05

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528128, 528172, 528173, 528174, 528176, 528183, 528185, 528190, 528191, 528220, 528229, 528350, 528353, C08G 6300, C08G 7310, C08G 6926

Patent

active

051771764

ABSTRACT:
Polyimide compositions, films, and electronic devices using polyimides, based on 9-aryl-9(perfluoroalkyl)-xanthene-2,3,6,7-dianhydride and one or more diamines from a selected group, which offers to the polyimides a combination of desirable properties including solubility, pseudo rod-like structure, low linear coefficient of thermal expansion, high glass transition temperature, low dielectric constant, and high modulus.

REFERENCES:
patent: 5051520 (1991-09-01), Trofimenko
patent: 5097000 (1992-03-01), Trofimenko
patent: 5101004 (1992-03-01), Trofimenko
Frank W. Harris & Steve L.-C. Hsu, Synthesis and Characterization of Polyimides Based on 3,6-Diphenylpyromellitic Dianhydride, 1989, pp. 3-16.
Frank W. Harris & Yoshimitsu Sakaguchi, Soluble Aromatic Polyimides Derived from New Phenylated Diamines, 1989, pp. 187-191.

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