Patent ID: 8538230
Filing Date: 2013-09-17
Classification: C08F,G02B

Abstract:
1. A resin composition for forming a cladding layer of an optical waveguide, which composition comprises (A) a (meth)acrylic polymer having a weight average molecular weight more than 100,000, (B) a urethane (meth)acrylate, (D) a radical polymerization initiator, and optionally contains (C) a (meth)acrylate having no urethane bond in the molecule thereof, wherein the total amount of components (B) and (C) incorporated into the composition is 10 to 200 parts by mass with respect to 100 parts by mass of the (meth)acrylic polymer having a weight average molecular weight of more than 100,000 (A); the amount of component (C) is 0 to 500 parts by mass with respect to 100 parts by mass of component (B); and the amount of the radical polymerization initiator (D) is 0.1 to 10 parts by mass with respect to 100 parts by mass in total of components (A), (B), and (C).