| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of shaping in a short time, having small curing shrinkage and capable of developing high toughness and dimensional accuracy by curing, by including a compound having oxetane ring, an epoxy-containing compound and a cationic photopolymerization initiator. SOLUTION: This photocurable resin composition comprises (A) a compound having an oxetane ring, e.g. a compound of formula I [Z is O or S; R<1> is H, F, a 1-6C (perfluoro)alkyl, a 6-8C aryl, etc.; R<2> is H, a 1-6C alkyl, a 2-6C alkenyl, a 6-8C aryl, etc.; R<2> is H, a 1-6C alkyl, a 2-6C alkenyl, a 6-8C aryl, etc.] or a compound of formula II [R<3> is a 1-20C (branched)alkylene, a 1-20C (branched) poly(alkyleneoxy), etc.], (B) an epoxy-containing compound (e.g. having 1,000 to 20,000 number-average molecular weight in gel permeation chromatography) and (C) a cationic photopolymerization initiator, e.g. in a weight ratio of 30-97wt.%, 3-50wt.% and 0.1-10wt.%, respectively. |
