Promotion effect of bifunctional five-membered cyclic dithiocarbonate on curing of one-component epoxy resin by imines as latent initiator

摘要

This article deals with curing of a one-component epoxy resin containing a bifunctional five-membered cyclic dithiocarbonate 1 with an imine 2 as a latent initiator. When 1 was added to a mixture of epoxy resin and 2, the curing rate and initial adhesive strength increased higher than that without 1. It was supposed that the reaction of 1 and an amine released from 2 was much faster than the amine-epoxide reaction, and a thiol group formed by the reaction of 1 with the amine accelerated the amine-epoxide reaction. The adhesive strength of the one-component epoxy resin containing 10 mol % of 1 exhibited the highest value. (C) 2004 Wiley Periodicals, Inc.