Polyimides and a process for their preparation

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant

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4284735, 430283, 522162, 522164, 528220, 528229, 5283291, 528331, C08G 200

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active

046771867

ABSTRACT:
Homopolyimides and copolyimides which contain structural elements of the formula I ##STR1## in which R.sup.1 and R.sup.2 are halogen, nitro, aryl, aryloxy, alkyl or alkoxy, m is 0 or a number from 1 to 4, n is 0 or a number from 1 to 3 and p is 0, 1 or 2, the free carbonyl groups are bonded in the ortho-position relative to one another and R is a divalent aromatic radical which is substituted by at least one alkyl group or aralkyl group, are autophotocrosslinkable. They are suitable for the production of protective films and photographic relief images.

REFERENCES:
patent: 3275690 (1966-09-01), Stroh et al.
patent: 3702318 (1972-11-01), Browning
patent: 3787367 (1974-01-01), Farrissey et al.
patent: 4030948 (1977-06-01), Berger
patent: 4310641 (1982-01-01), Ohmura et al.
patent: 4439619 (1984-03-01), Bey et al.

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