Patent ID: 9617420
Date: 2017-04-11
CPC Classifications: C08G,C08L,C09J

Claim:
1. An epoxy resin composition comprising: an epoxy resin (A), a urethane resin (B) comprising a urethane prepolymer formed by reacting one or more polyol compounds, one or more isocyanate compounds, and bisphenol A to form a urethane prepolymer having a terminal isocyanate, reacting the urethane prepolymer having the terminal isocyanate with at least one of an ε-polycaprolactam, an oxime, or a pyrazole to block the terminal isocyanate, and a curing agent (C) selected from the group consisting of dicyandiamide, 4,4-diaminodiphenylsulfone, an imidazole derivative, isophthalic acid dihydrazide, an N,N-dialkylurea derivative, an N,N-dialkylthiourea derivative, an acid anhydride, isophorone diamine, m-phenylene diamine, N-aminoethylpiperazine, melamine, guanamine, a boron trifluoride complex, tris(dimethylaminomethyl)phenol, a polythiol, and combinations thereof, wherein a ratio of a number of moles of hydroxy groups on the one or more polyol compounds that are reacted to a number of moles of hydroxy groups on the bisphenol A that are reacted ((polyol-OH)/(BisA-OH)) is from about 1:0.1 to about 1:3.0.