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

C - Chemistry, Metallurgy

08

G

402/1, 400/2002,

C08G 73/10 (2006.01) C08G 73/14 (2006.01) C08G 73/16 (2006.01) G03F 7/038 (2006.01)

Patent

CA 1244995

Polyimides, a process for their preparation and their use Abstract: Homopolyimides and copolyimides of aromatic tetra- carboxylic 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 benzophenone- tetracarboxylic acid, are radiation-sensitive and auto- photocrosslinkable. The polyimides are suitable for the production of films, protective coatings and photographic relief images.

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