RADIATION-CURING RESIN COMPOSITION AND OPTICAL MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a radiation-curing resin composition capable of having a suitable viscosity before curing and a high refractive index and a high Abbe's number after curing. SOLUTION: The composition comprises (A) a compound obtained by reacting (a) a polythiol with (b) a compound having an alicyclic structure and≥2 (meth)acryloyl groups and having≥2 (meth)acryloyl groups, (B) a compound having the alicyclic structure and an ethylenically unsaturated group other than the component (A) and (D) a photopolymerization initiator. The composition may contain (C) a compound having≥40 Abbe's number of a cured product prepared by carrying out homopolymerization thereof and having the ethylenically unsaturated group other than the component (A) and the component (B) and/or (E) a compound having a brominated aryl group and an acryloyl or a methacryloyl group. The cured product of the composition has≥1.555 refractive index (nD25) and≥48 Abbe's number. COPYRIGHT: (C)2008,JPO&INPIT