| 摘要 |
PURPOSE:To enhance easiness in manufacture, physical properties, resistance to solvents, and the like by incorporating a composite rubber obtained by reaction of a specified urethane-modified acrylate with an elastomer, a specified polymerizable compound, and a photoinitiator. CONSTITUTION:Hundred pts.wt. of this photosensitive composition comprises 5-98 pts.wt. of the composite rubber obtained by reaction of the diene type urethane-modified acrylate represented by formula I, with the elastomer and having a gel fraction of <=0.5%, 1-80 pts.wt. of the other elastomer, 1-50 pts.wt. of the polymerizable compound having a photopolymerizable group, and 0.1-20 pts.wt. of the photopolymerization initiator. In formula I, R is 2-8 C alkylene or the like; R1 is H or methyl; each of R2 and R3 is the residue of a diisocyanate compound freed of isocyanate groups: R4 is a group of formula II; R5 is 2-8C alkylene or the like; each of R6 and R7 is H or methyl or the residue freed of OH of a divalent alcohol combined with an acryloyloxy group or the like; and X is the residue freed of OH of a diene type liquid rubber having OH. A support is coated with this composition in a thickness of 0.2-20mm. |
