EPOXY RESIN, EPOXY RESIN COMPOSITION AND CURED PRODUCT OF SAME

摘要

Provided is a phosphorus-containing epoxy resin represented by general formula (1), which has an epoxy equivalent of 200-600 g/eq, a phosphorus content of 1-5 wt%, a total chlorine content of 0.2 wt% or less and a melt viscosity at 100oC of 1,000 mPa.s or less, having excellent low viscosity characteristics and good flame retardancy. In general formula (1), X represents a C6-31 hydrocarbon group having at least one cyclohexane ring or aromatic ring, which may be either monocyclic or heterocyclic, and optionally having an oxygen atom, a nitrogen atom or a sulfur atom; Y represents a group represented by formula (2); z represents hydrogen or a group represented by formula (3) or (4); and n represents an integer of 0 to 10. In formula (2), R1 and R2 may be either the same or different and each represents hydrogen or a linear, branched or cyclic hydrocarbon group, or R1 and R2 may be bonded together to form a cyclic structure; k represents an integer of 0 or 1; and Ar represents benzene, biphenyl, naphthalene, anthracene, fenanthrene or a hydrocarbon-substituted derivative thereof. In formula (3), R3 and R4 may be either the same or different and each represents hydrogen or a linear, branched or cyclic hydrocarbon group, or R3 and R4 may be bonded together to form a cyclic structure; and m represents an integer of 0 or 1.