| 摘要 |
<P>PROBLEM TO BE SOLVED: To simultaneously provide ultrahigh sensitivity, excellent developability and a broad heat control width. <P>SOLUTION: An acid group-containing vinyl ester resin and a photopolymerization initiator are used as indispensable components. The acid group-containing vinyl ester resin has a multiple branching molecular structure and is produced by reacting an epoxy vinyl ester resin, obtained by reacting a novolak epoxy resin with acrylic acid, with a polybasic acid anhydride, then reacting the acid group, formed by the reaction, with glycidyl methacrylate, and further reacting the secondary hydroxyl group, formed by this reaction, with a polybasic acid anhydride. The acid group-containing vinyl ester resin contains 1.75-3.5 radically polymerizable unsaturated double bonds per aromatic ring and contains the acid group in such an amount range that the acid value is 30-150 mgKOH/g. <P>COPYRIGHT: (C)2007,JPO&INPIT |
