Polyimides, a process for their preparation and their use

Details Polyimides, a process for their preparation and their use Polyimides, a process for their preparation and their use

1984-05-10

1986-12-16

Phynes, Lucille M.

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

Synthetic resins

From carboxylic acid or derivative thereof

430283, 430325, 522164, 528125, 528126, 528128, 528172, 528185, 528188, 528229, 528352, C08G 6926

Patent

active

046297774

ABSTRACT:
Homopolyimides and copolyimides of aromatic tetracarboxylic acids and aromatic diamines which are substituted in the two ortho-positions relative to at least one N atom by alkyl, alkoxy, alkoxyalkyl, cycloalkyl or aralkyl, are soluble in organic solvents and have increased glass transition temperatures and hence very good heat stabilities. Such polyimides, which contain radicals of a benzophenonetetracarboxylic acid, are radiation-sensitive and autophotocrosslinkable. The polyimides are suitable for the production of films, protective coatings and photographic relief images.

REFERENCES:
patent: 4390665 (1983-06-01), Giles, Jr.
patent: 4438256 (1984-03-01), Ohta et al.
patent: 4512893 (1985-04-01), Makino et al.
patent: 4520075 (1985-05-01), Igarashi et al.
patent: 4535099 (1985-08-01), Lee et al.

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