POLYVINYL ALCOHOL, POLYVINYL ESTER AND PHOTOSENSITIVE COMPOSITION

摘要

PURPOSE:To obtain a photosensitive composition which can give a flexible, impact-resistant photosensitive resin plate coated with a cured film having good water resistance by using a specified polyvinyl alcohol polymer having a (poly)alkylene oxide as a side chain. CONSTITUTION:A polyvinyl alcohol polymer containing 0.1-30mol% structural units of formula I and having a degree of saponification of 50mol% or above and a degree of polymerization of 10 or above; or a polyvinyl alcohol polymer containing 0.1-30mol% structural units of formula II and having a degree of saponification of 50mol% or above and a degree of polymerization of 10 or above. In formula I and II, R<1> is hydrogen or methyl; R<2> is hydrogen or 1-4C alkyl; R<3> is 1-20C alkylene which may be branched; R<4> is hydrogen or 1-20C alkyl; R<5> is 1-3C alkylene; and (x) is a group of formula III or IV (wherein n is 1-500) which is bonded to R<3> on the side of the oxygen atom.