Importance

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Abstract

The present invention is to provide a phosphorus containing epoxy resin compositions, comprising an epoxy resin composition (a) in which a phosphorus containing epoxy resin (A) and a hardener are contained, wherein said phosphorus containing epoxy resin (A) is a phosphorus containing resin composition prepared by reacting phosphorus containing organic compounds (B) obtained by the reaction in the range of molar ratio of 1.01 to 2 moles of organic phosphorus compounds (b) having one active hydrogen atom bonded to phosphorus atom and 1 mole of quinone compound with at least one kind of epoxy resins (C) selected from the groups composed of general formula 1, general formula 2 or general formula 3 so as the content of said epoxy resins (C) to be from 20 to 45 wt. %, ##STR1## wherein R.sub.1 is a hydrogen atom and/or a phenyl group, m is an integer including 0, ##STR2## wherein R.sub.2 is a hydrogen atom and/or a phenyl group, n is an integer including 0, ##STR3## wherein R.sub.3 is a hydrogen atom and/or a phenyl group, I is an integer including 0, in addition X is --CH.sub.2 --, --O--, --CO--, --SO.sub.2 --, --S--, --CH(C.sub.6 H.sub.5)--, --C(C.sub.6 H.sub.5).sub.2 --, not existing functional group or chemical formula 4. ##STR4##

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First Claim