Patent ID: 7208228
Filing Date: 2007-04-24
Classification: C08J,C08L,Y10T

Abstract:
1. An epoxy resin composition, comprising: an epoxy resin comprising an epoxy compound X and an epoxy compound Z, the epoxy compound X being a bisphenal A resin and having an epoxy equivalent weight of at least about 400, and the epoxy resin compound Z having a functionality of at least about 2.2 and being selected from the group consisting of phenol-novolak epoxy resins, glycidyl amine epoxy resins and cresol-novolak epoxy resins, a curing agent, and a liquid rubber that is liquid at room temperature and comprises a reactive group; wherein the liquid rubber forms no visible domains by optical microscopy or has a maximum domain size of 3 microns or less when the epoxy resin composition is cured, further wherein the liquid rubber is about 0.1 to about 5 parts by weight per 100 parts by weight of the epoxy resin of the epoxy resin composition.