The Study on Mechanism of Water Resistance of Rigid Polyurethane Foam Material with KH-560

In order to reduce the effect of water on the properties of polyurethane foam material,the γ-(2,3-epoxy propoxy) propyl trimethoxysilane(KH-560) was added into the polyurethane foam material.And the water absorption of polyurethane foam material before and after adding silane coupling agents was studied with using TG,SEM and IR.The mechanism of water resistance of foam material was researched.The TG results showed that by adding KH-560,the water absorption of polyurethane foam reduced greatly.When the coupling agent amount was 3%,the foam pore structure was best,and the water absorption of foam material was lowest.The SEM results showed that by adding KH-560,a structure was formed in polyurethane foam material which had higher closed pore rate and smaller space between pores,and this made the water disperse and be absorbed more slowly in the materials.