Patent ID: 7064157

Claim:
A phosphorus-containing epoxy resin having the formula (A): wherein R 5 is selected from —O—, —NH—, —S—, —COO—, —SO 3 —, —CO—, and —CH 3 CON< group; Ar 1 and Ar 2 are independently selected from the moieties as follows: R 6 is H, C 1-10 alkyl or aryl; R 7 is —CH 2 —, —(CH 3 ) 2 C—, —SO 2 —, —CO—, —O—; R 8 is —OH, —NH 2 , —SH, —COOH, —SO 3 H, —COH, or —NHCOCH 3 ; m and n are integers from 0 to 4; z is an integer from 1 to 20; Epoxy- is a group containing at least one epoxy group.