Patent ID: 6291626
Filing Date: 2001-09-18
Classification: C07F,C08G,H01L,H05K

Abstract:
A flame-retardant advanced epoxy resin and a cured epoxy resin represented by the following formula (I): ##STR16##wherein:m is greater than 0 to 10;X=A or B, wherein ##STR17##when X=A, the formula (I) represents the advanced epoxy resin, X=B, the formula (I) represent the cured epoxy resin; ##STR18##wherein R.sub.1 is hydrogen or C.sub.1-4 hydrocarbon group;E.sub.p is ##STR19##wherein ##STR20##or a phenol-aldehyde novolac epoxy resin backbone, and when Ep is the phenol-aldehyde novolac epoxy resin backbone, the flame-retardant advanced epoxy resin and the cured epoxy resin represented by the formula (I) is prepared by reacting a dihydric phenol or naphthol having the following (III) ##STR21##wherein R is the same as defined above, with a phenol-aldehyde novolac epoxy resin having the following formula (II') ##STR22##wherein R.sub.1 is the same as defined above, g is an integer of 1-6, R.sub.4 and R.sub.5 independently is hydrogen, or --CH.sub.3.