Novel copolyimides and polyamic acid precursors therefor

Details Novel copolyimides and polyamic acid precursors therefor Novel copolyimides and polyamic acid precursors therefor

1985-11-14

1987-01-06

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

528 26, 528 31, 528172, 528173, 528183, 528184, C08G 6926

Patent

active

046347607

ABSTRACT:
Copolyimides having good solvent resistance, thermal stability and processability contain about 2-50 mole percent of structural units derived from a tetracarboxybiphenyl, in combination with other structural units typically derived from bisphenol A dianhydride.

REFERENCES:
patent: 3983093 (1976-09-01), Williams, III et al.
patent: 4247443 (1981-01-01), Sasaki et al.
patent: 4290436 (1981-09-01), Sasaki et al.
patent: 4438256 (1984-03-01), Ohta et al.
patent: 4489185 (1984-12-01), Schoenberg

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