Patent ID: 9243139
Filing Date: 2016-01-26
CPC Classification: B32B,C08G,C08J,C08L,Y10T

Claim Text:
1. An epoxy resin composition comprising an epoxy resin [A], an amine-based curing agent [B] and a block copolymer [C] as components, wherein the epoxy resin [A] contains [Aa] and [Ab] as defined below, the amine-based curing agent [B] is diaminodiphenylsulfone, and the block copolymer [C] is defined below: [Aa] is an epoxy resin having at least one structure selected from a condensed polycyclic structure and oxazolidone ring structure, wherein the condensed polycyclic structure is at least one structure selected from a naphthalene structure, and fluorene structure; [Ab] is a polyfunctional amine epoxy resin [Ab1] and a liquid bisphenol epoxy resin [Ab2]; [C] is at least one block copolymer selected from the group consisting of S-B-M, B-M and M-B-M; wherein wherein epoxy resin [A] contains 30 to 70 mass % of component [Aa], 25 to 50 mass % of component [Ab1] and 10 to 40 mass % of component [Ab2], based on 100 mass % of epoxy resin [A], and the block copolymer [C] is present in an amount of 1 to 10 parts by mass per 100 parts by mass of epoxy resin [A].