Patent ID: 9074041
Filing Date: 2015-07-07
Classification: C08G,C08J

Abstract:
1. A curable epoxy resin composite composition comprising: (I) a reinforcing material; and (II) a curable epoxy resin composition; wherein the reinforcing material (I) is present in an amount of from about 5 weight percent to about 80 wt % of the total weight of (I) and (II); wherein the curable epoxy resin composition (II) wets the reinforcing material (I); wherein curable epoxy resin composition (II) comprises (a), (b), (c), and (d): (a) from about 15 weight percent to about 90 weight percent of at least one epoxy resin having an average of more than one glycidyl ether group per molecule, based on the overall weight of the curable epoxy resin composition (II); (b) from about 5 weight percent to about 25 weight percent of at least one alkanolamine curing agent, based on the overall weight of the curable epoxy resin composition (II); wherein the at least one alkanolamine is selected from the group consisting of propanol amine, ethanolamine, diethanolamine, triethanolamine, N-methylethanolamine, aminoethylethanolamine, and mixtures thereof; (c) from about 1 weight percent to about 40 weight percent of at least one liquid styrenated phenol, based on the overall weight of the curable epoxy resin composition (II); wherein the at least one liquid styrenated phenol has a viscosity of less than about 500 centipoise at about 25° C.; and (d) from about 1 part to about 50 parts of a co-curing agent per hundred parts of epoxy resin present in the curable epoxy resin composition (II); wherein the co-curing agent is different from the alkanolamine curing agent; provided that the amounts of (a), (b), (c), and (d) result in a curable epoxy resin composition (II) having a viscosity of less than about 1,000 centipoise at about 25° C.; wherein the combination of the at least one liquid styrenated phenol (c) and the at least one alkanolamine curing agent (b) accelerates the reactivity of the curable epoxy resin composition (II), as indicated by gel time or time required to achieve a target viscosity; and wherein upon curing of the curable epoxy resin composite composition, the cured epoxy resin composite composition forms a cured composite having a glass transition temperature greater than or equal to about 70° C. and a balance of thermal and mechanical properties to meet Germanischer Lloyd minimum standards for tensile properties, bending strength and water absorption.