Studies on New Type of Phenolic Resin by Ring Opening Reaction of Benzoxazine (VI)-Curing Reaction of Bisphenol-A Type Novolac Based Benzoxazine with Bisoxazoline and the Properties of the Cured Resin

摘要

The purpose of study is to reduce the cure time and to lower the cure temperature of benzoxazine compounds. We investigated the curing behavior of bisphenol-A type novolac based benzocaxine with bisoxazoline (BisAN-a/1,3-PBO) and the properties of the cured resin. As a result, the molten resin mixtrue from BisAN-a/1,3-PBO showed good thermal stability and flowability below 120 deg C, as well as that from conventional bisphenol-A based benzoxazine and bisoxazoline (B-a/1,3-PBO). However, above 160 deg C the curing reaction of BisAN-a/1,3-PBO proceeded more rapidly than that of B-a/1,3-PBO. It was found that the cure time of the molten resin mixture from BisAN-a/1,3-PBO could be reduced and also the cure temperature could be lowered. Compared with those from B-a/1,3-PBO. The cured resin from BisAN-a/1,3-PBO has superior heat resistance and water resistance to that from B-a/1,3-PBO because of higher crosslink density.