Epoxy resin rendered flame retardant by reaction with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide

摘要

A flame-retardant epoxy resin was prepared by reacting an active-hydrogen-containing phosphorus compound with a di- or poly-functional epoxy resin via an addition reaction between the active hydrogen and the epoxide group, is suitable for printed circuit board and semiconductor encapsulation applications. The active-hydrogen-containing phosphorus compound is 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide having a chemical structure as follows: