Polyimides prepared from disubstituted aromatic tetracarboxylic

Details Polyimides prepared from disubstituted aromatic tetracarboxylic Polyimides prepared from disubstituted aromatic tetracarboxylic

1990-01-19

1992-10-06

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

20414236, 4284835, 430 9, 528 26, 528 27, 528 28, 528125, 528128, 528188, 528352, C08G 6926, C08G 6942, C08G 7500

Patent

active

051533030

ABSTRACT:
Fully cyclized polyimides based on aromatic tetracarboxylic acid dianhydrides with substitution in the positions ortho to the bridging moiety and aromatic diamines, exhibiting solubility in organic solvents, increased glass transition temperatures, low coefficients of thermal expansion and photoimagability; said polyimides being suitable for the production of films, protective coatings and photolithographic relief images.

REFERENCES:
patent: 3856752 (1974-12-01), Bateman et al.
patent: 3890272 (1975-06-01), D'Alelio
patent: 4578166 (1986-03-01), Uno et al.
patent: 4816115 (1989-03-01), Horner et al.
patent: 4851506 (1989-07-01), Rohde et al.
patent: 4914181 (1990-04-01), Pfeifer et al.

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