ORGANIC PHOSPHORUS COMPOUND, CURABLE RESIN COMPOSITION CONTAINING ORGANIC PHOSPHORUS COMPOUND, AND CURED PRODUCT THEREOF, AND METHOD FOR PRODUCING ORGANIC PHOSPHORUS COMPOUND

摘要

To provide an organic phosphorus compound useful as e.g. a flame retardant of an epoxy resin cured product, and a flame-retardant resin composition prepared therewith.SOLUTION: An organic phosphorus compound is obtained by the reaction of 1 mol of a quinone compound having a benzene ring, a naphthalene ring, an anthracene ring, or a phenanthrene ring with 2 mol of a phosphorus compound represented by formula (2). (Rand Rare each a hydrocarbon group optionally having a hetero element, where Rand Rmay be bound to each other to form a cyclic structure; n1 and n2 are each 0 or 1).SELECTED DRAWING: None