Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From ketone or ketene reactant
Patent
1986-08-07
1987-06-30
Brammer, Jack P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From ketone or ketene reactant
4284735, 430283, 522162, 522164, 528220, 528229, 5283291, 528331, C08G 200
Patent
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.
Brammer Jack P.
Ciba-Geigy Corporation
Hall Luther A. R.
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