| 摘要 |
PURPOSE:To reduce the cost required for treatment of waste water by using a linear polymer, photopolymerizable ethylenic unsatd. compd. contg. the compd. expressed by the prescribed formula, and photopolymn. initiator consisting of respectively specified compsns. to constitute a photopolymerizable laminate which permits alkaline development suitable for formation of a printed circuit board. CONSTITUTION:The photopolymerizable layer is constituted of the following layer at the time of forming the laminate by laminating the photopolymerizable layer on a base layer: Said layer is constituted of 5-93wt% linear polymer having 100-180 acid equiv. of carboxy group content and 50,000-600,000 weight average mol.wt., 93-5wt% photopolymerizable ethylenic unsatd. compd. contg. the compd. expressed by the general formula, and 0.01-10wt% photopolymn. initiator. In the general formula, R1 and R2 denote hydrogen or methyl group and m+n=0-20 is specified. The linear polymer is obtd. by the hydrolysis of the polymer of an acrylate, etc. and the photopolymn. initiator is a 2-ethyl anthraquinone to be activated by UV rays, etc. |
