Patent ID: 6291627
Filing Date: 2001-09-18
Classification: C07F,C08G,H01L,H05K

Abstract:
A phosphorus-containing flame-retardant epoxy resin having a structure selected from the group consisting of formulas (a) to (d): ##STR19##wherein:m is an integer from 1 to 12; R.sub.1 =H or C.sub.1 -C.sub.4 hydrocarbon radical R.sub.4 and R.sub.5 are, independently, hydrogen, methyl or ##STR20##wherein R.sub.1 is defined as above; andX=A or B, and at least one of X is B, wherein ##STR21##wherein E is ##STR22##wherein X is defined as above; and Q is ##STR23##wherein X and Q are defined as above; and ##STR24##wherein X is defined as above; and Y is --(CH.sub.2).sub.n -- or phenylene, wherein n is an integer of 0 to 6.