Phosphorus-containing epoxy resin with a phosphorus-containing phenolic compound obtained by a specific production process, phosphorus-containing epoxy resin composition and a cured product using the resin

摘要

PROBLEM TO BE SOLVED: To provide a phosphorus-containing epoxy resin which is suitable to a sealing material used for a copper clad laminate or an electronic part used for an electronic circuit substrate, and highly combines appearance, yield and economy, and to provide a phosphorus-containing epoxy resin composition and cured product of the same.;SOLUTION: A compound expressed by formula (1) in which in a peak area (A), a peak area (B) closer to a polymer side than the peak area (A), and a total area (C) of the peak area (A) and the peak area (B) on a chromatogram measured by a specific condition using gel-permeation chromatography, a value dividing the peak area (B) by the peak area (C) is at most 8%, and a compound expressed by formula (2) are reacted to obtain a phosphorus-containing phenol compound expressed by formula (3). The phosphorus-containing epoxy resin is obtained by reacting the phosphorus-containing phenol compound and an epoxy resin. The phosphorus-containing epoxy resin compound and the cured product are disclosed.;COPYRIGHT: (C)2010,JPO&INPIT