Phosphites, process for producing them and their use

摘要

Phosphites which are a deterioration inhibitors for organic material represented by the formula: <IMAGE> (I) wherein R1 and R2 independently represent a hydrogen atom, or certain hydrocarbyl radicals; X represents a direct bond, a sulfur atom or a methylene group which may optionally be substituted; Z is -A1-CO-O-Y1 or -A2-O-CO-Y2 wherein A1 is a direct bond or an alkylene group; Y1 is aralkyl or aryl; A2 is a residue of a dihydric alcohol; and Y2 is alkyl, aralkyl or a phenyl group, and a process for producing the same are provided.