Optical waveguide forming epoxy resin composition, curable film formed from the epoxy resin composition for formation of optical waveguide, and light transmission flexible printed board

摘要

An excellent optical waveguide forming epoxy resin composition is provided, comprising:
(A) a liquid epoxy resin;(B) a solid resin; and(C) a photoacid generator;
wherein the liquid epoxy resin (A) comprises a liquid epoxy resin represented by the following general formula (1) as a major component thereof in a proportion of 50 to 80 wt % based on an overall amount of a resin component of the resin composition:;
wherein R1 and R2 are each a hydrogen atom or a methyl group; R3 to R6 are each a hydrogen atom, a methyl group, a chlorine atom or a bromine atom; X is a C2 to C15 alkylene group, an ethyleneoxy group, a di(ethyleneoxy) group, a tri(ethyleneoxy) group, a propyleneoxy group, a propyleneoxypropyl group, a di(propyleneoxy) propyl group or a tri(propyleneoxy)propyl group; and n is a natural number and has an average value of 1.2 to 5.

主权项

1. An optical waveguide forming epoxy resin composition, comprising:
(A) a liquid epoxy resin; (B) a solid resin; and (C) a photoacid generator;
wherein the liquid epoxy resin (A) comprises a liquid epoxy resin represented by the following general formula (1) as a major component thereof, said liquid epoxy resin represented by general formula (1) being present in a proportion of 50 to 80 wt % based on an overall amount of a resin component of the optical waveguide forming epoxy resin composition: wherein R1 and R2 are each a hydrogen atom or a methyl group; wherein R3 to R6 are each a hydrogen atom, a methyl group, a chlorine atom or a bromine atom; wherein X is a C2 to C15 alkylene group, an ethyleneoxy group, a di(ethyleneoxy) group, a tri(ethyleneoxy) group, a propyleneoxy group, a propyleneoxypropyl group, a di(propyleneoxy)propyl group or a tri(propyleneoxy)propyl group; and wherein n is a natural number and has an average value of 1.2 to 5.