Nitrogen-containing flame retarding epoxy resin and an epoxy resin composition containing the same

Abstract

The present invention relates to a nitrogen-containing epoxy resin of the following formula: wherein R's are the same or different and each represents a hydrogen atom or —R13—C6-10 aryl-(OR14)p, and the aryl group is optionally substituted with C1-6 alkyl group, in which R13 represents a C1-6 alkylene group or a phenylene —CH2— group optionally substituted with a hydroxy group, R14 represents a glycidyl group, and p is an integer of 1 or 2, provided that at least one R group is not a hydrogen atom; R1 represents a phenyl group or —N(R)2 group in which R is defined as above. The resin is produced from sequentially reacting melamine derivatives with aldehydes, phenolic compounds, and epihalohydrin. The nitrogen-containing epoxy resin, alone or as part of an epoxy resin composition, provides excellent flame-retardant and heat-resistant properties without using halogen or diantimony trioxide; hence, the resin and its composition are favorable as encapsulating materials for semiconductor applications.

Dependencies are inferred from the claim text.