Flame-retardant resin composition, prepreg, resin sheet, and molding

Abstract

Provided is a flame-retardant resin composition that keeps flame-retardancy certainly without containing any halogen compound, which may cause the generation of a harmful material, and can simultaneously maintain the original property of the resin at a high level. The invention relates to a flame-retardant resin composition. The composition contains a resin containing any one or both of a thermosetting resin and a thermoplastic resin, and a cyclophosphazene represented by the following formula (1) wherein the cyclophosphazene compound is incorporated into the resin in an amount of 0.1 to 200 parts by mass based on 100 parts by mass of the resin: wherein n=3 to 25, one of R1 and R2 is CN, and the other is H, or both thereof are CN, and the percentage of the cyanophenoxy groups in the compound is from 2 to 98% of the total number of the phenoxy groups and the cyanophenoxy groups in the compound.

Dependencies are inferred from the claim text.