| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a resin compsn. excellent in water developability, less liable to swell at the time of water development, causing a slight reduction of strength and a slight dimensional change at the time of water development and giving a resin plate excellent in strength, breaking extension and impact resilience after photosetting. SOLUTION: This resin compsn. contains a particle-shaped copolymer obtd. by emulsion- or suspension-polymerizing a monomer mixture contg. an aliphatic conjugated diene monomer, a mono-unsatd. monomer having a carboxyl, amino, hydroxyl or epoxy group and a poly-unsatd. monomer as essential components, a block copolymer consisting of two or more polymer segments and having an O-contg. repeating units in the principal chain of at least one of the segments, a photopolymerizable unsatd. monomer and a photopolymn. initiator.</p> |
