Patent ID: 6013730
Filing Date: 2000-01-11
Classification: C08G,C08J,C08L,Y10T

Abstract:
A curable composition comprising an epoxy resin system, wherein said epoxy resin system comprises:an epoxy resin comprising at least one first epoxy resin component and at least one second epoxy resin component, at least one curing agent for said epoxy resin, and a reaction product formed in situ by prereaction between a solid rubber and at least a proportion of said at least one first epoxy resin component in a rubber to first epoxy resin component weight ratio of between 1:1 and 1:20,wherein each of said at least one first epoxy resin component comprises monomers having an epoxy functionality of greater than 3 and at least 0.05 wt % of oligomers of said monomers, and wherein each of said at least one first epoxy resin component is independently a polyglycidyl derivative or an oligomer of a polyglycidyl derivative of at least one compound selected from the group consisting of aromatic diamines, aromatic monoprimary amines and aminophenols,wherein each of said at least one second epoxy resin component has an epoxy functionality of greater than 1 but no more than 3, andwherein said solid rubber has at least 1 wt % of reactive groups, and wherein said solid rubber is swellable or soluble in a reaction mixture in which said reaction product is formed.