气干性酚醛环氧乙烯基树脂的研制

Development of air-drying novolac epoxy vinyl resin

采用交联共聚法合成了气干性酚醛环氧乙烯基树脂。研究了物料配比、阻聚剂用量、反应温度对反应的影响,测试了树脂的耐腐蚀性、气干性和力学性能。结果表明,酯化过程最佳工艺条件为:反应温度110～115℃,反应时间2.5 h,醇、酸物质的量比1.1∶2,阻聚剂质量分数0.05%,催化剂质量分数0.3%。交联聚合过程最佳工艺条件为:反应温度75～85℃反应时间2.0 h,改性剂(甲苯二异氰酸酯)加入质量5%。合成的树脂的弯曲强度为101 MPa,弯曲模量3.66 GPa,冲击强度11.4 kJ/m2,气干性、韧性、固化性能均超过同类树脂,可用于耐温强腐蚀场合以及用作表面涂层、耐温腻子基体树脂、自流平树脂等。

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 diisocya- nate） amount 5%. The bending strength, bending modulus and impact strength of product resin were 101 MPa, 3.66 GPa and 11.4 kJ/m^2. 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 sur- face coatings, heat resistant putty matrix resins and self- leveling resins.