Patent ID: 8722798
Filing Date: 2014-05-13
Classification: C08G,C08K,C08L,C09D,C25D

Abstract:
1. A thermosettable composition comprising (a) at least one amphiphilic block copolymer, wherein the amphiphilic block copolymer is an amphiphilic polyether block copolymer containing at least one epoxy resin miscible block segment and at least one epoxy resin immiscible block segment, wherein the immiscible block segment comprises at least one polyether structure provided that the polyether structure of said immiscible block segment containing at least one or more alkylene oxide monomer units having at least four carbon atoms, (b) at least one polyol, wherein the polyol is an aliphatic polyol having from 2 to about 20 carbon atoms or wherein the polyol is a cycloaliphatic polyol having from 6 to 20 carbon atoms, (c) at least one epoxy resin containing an average at least 2 oxirane rings per molecule, (d) at least one anhydride hardener containing an average at least 1 anhydride ring per molecule, and (e) at least one catalyst; wherein the weight ratio of the amphiphilic block copolymer (a) to the polyol (b) is from about 20:1 to about 1:40; wherein the molar ratio of the epoxy resin (c) to the anhydride hardener (d) is from about 2:1 to bout 1:2; and wherein said thermosettable composition has the characteristic that upon being cured forms thermoset product having a glass transition temperature higher than about 70° C., and a fracture toughness in terms of critical-stress-intensity factor, K