Development of air-drying novolac epoxy vinyl resin

The air-drying novolac epoxy vinyl resin was synthesized by crosslinking copolymerization.The effects of raw material ratio,inhibitor amount,reaction temperature on the reaction were investigated.The corrosion resistance,air dry and mechanical properties of the resin were tested.The results showed that the optimum conditions for the esterification process were as followed:reaction temperature 110-115 ℃,reaction time 2.5 h,molar ratio of alcohol to acid 1.1∶2,inhibitor amount 0.05%,catalyst amount 0.3%.The optimal cross-linking polymerization conditions were as followed:reaction temperature 75-85 ℃ reaction time 2.0 h,modifier(toluene diisocyanate) amount 5%.The bending strength,bending modulus and impact strength of product resin were 101 MPa,3.66 GPa and 11.4 kJ/m2.The air dry,toughness and curing properties of the procucts were better than that of other similar resins.The product could be used for high temperature and strong corrosion occasions and used as surface coatings,heat resistant putty matrix resins and self-leveling resins.