Photosensitive resin composition.

摘要

A conjugated diene copolymer comprising (A) 40 to 90 mole % of a conjugated diene component, (B) 0.5 to 10 mole % of an alpha,beta-ethylenically unsaturated carboxylic acid component, (C) 0.1 to 5 mole % of a polyfunctional alkenyl compound component and (D) 5 to 58 mole % of a monoolefinically unsaturated compound component wherein the intrinsic viscosity [ eta ] of the copolymer as measured at 30 DEG C in dimethylformamide is 0.01 to 3.0 dl/g, the width ( DELTA Tg) of the endothermic transition temperature section determined by a differential scanning calorimetry is 45 DEG to 120 DEG C and the limit temperature (T1) on the lower temperature side of the endothermic transition temperature section is -40 DEG C or less. This copolymer, when combined with a photopolymerizable unsaturated monomer and a photosensitizer, provides a photosensitive resin composition which is soluble in aqueous alkali solutions, has an excellent processability and a photocurability, has an excellent rubber elasticity and a transparency even after curing, and has excellent water resistance.