PRODUCTION OF PARTIALLY IMIDIZED PHOTOSENSITIVE POLY(AMIC ACID) ESTER

摘要

PURPOSE: To obtain the desired ester useful as a photosensitive resin having high sensitivity and reduced shrinkage by subjecting a partially imidized poly(amic acid) obtained by a given method and specific alcohols to an ester-forming addition reaction. ;CONSTITUTION: A tetracarboxylic dianhydride and/or a tetracarboxylic acid derivative (e.g. 3,3',4,4'-benzophenonetetracarboxylic dianhydride) is reacted with a diamine (derivative) (e.g. 4,4'-diaminodiphenyl ether) at 50-120°C to conduct amide-forming polyaddition and ring-closure imidization with dehydration. The partially imidized poly(amic acid) thus obtained is reacted with alcohols in the presence of a carbodiimide derivative (e.g. N,N-dicyclohexylcarbodiimide) by an ester-forming addition reaction, the alcohols comprising an alcohol (a) represented by the formula wherein R₁ is a di- to hexavalent organic group; R₂ is H or CH₃; and p is 1-5 and one or more alcohols (b) selected from CH₃OH, C₂H₅OH, and C₃H₇OH, the molar amount (x) of the alcohol (a) and that (y) of the alcohol (b) satisfying the relation 0.2[x/(x+y)]1.0.;COPYRIGHT: (C)1994,JPO