高触变高抗流挂双组分水性环氧涂料的制备  

Preparation of Two-component Waterborne Epoxy Coatings with High Thixotropy and High Anti-sagging Resistance

作　　者：李永康 王佳胜 刘胜普 付长清 Li Yongkang;Wang Jiasheng;Liu Shengpu;Fu Changqing(The Department of Coatings and Polymeric Materials,College of Chemistry and Chemical Engineering,Jiangxi Science&Technology Normal University,Nanchang 330013,China;Jiangxi Engineering Laboratory of Waterborne Coating,Nanchang 330013,China;Jiangsu Fuqisen new material Co.,Ltd.,Nantong,Jiangsu 226407,China)

机构地区：[1]江西科技师范大学化学化工学院涂料与高分子系,南昌330013 [2]江西省水性涂料工程研究中心,南昌330013 [3]江苏富琪森新材料有限公司,江苏南通226407

出　　处：《涂料工业》2024年第5期49-54,共6页Paint & Coatings Industry

摘　　要：双组分水性环氧涂料具有触变性和抗流挂性不易调节的问题。采用聚氨酯缔合型增稠剂和膨润土复配,并选用乳液型胺固化剂取代常用的水溶性胺固化剂的方式,制备了一款具有高触变、高抗流挂和优异综合性能的双组分水性环氧涂料。研究了增稠剂和流变助剂的种类及用量、胺固化剂的类型对双组分水性环氧涂料的触变性、抗流挂性及其他应用性能的影响规律,结果表明:6870乳液型胺固化剂与299增稠剂和LT膨润土之间存在相互促进作用,当299增稠剂用量为0.5%、LT膨润土用量为0.3%时,搭配6870乳液型胺固化剂可制得触变指数为4.5、抗流挂极限膜厚为475μm、综合性能优异的双组分水性环氧涂料。Two-component waterborne epoxy coatings have the problems of difficult adjustment of thixotropy and anti-sagging resistance.In this paper,a two-component waterborne epoxy coatings with high thixotropy,high anti-sagging and excellent comprehensive properties was prepared by the compounding of polyurethane association thickener and bentonite,and the selecting emulsion-type amine curing agent to replace the commonly used water-soluble amine curing agent.The effects of the type and amount of thickeners and rheological additives,and the type of amine curing agent on the thixotropy,anti-sagging and other application properties of two-component waterborne epoxy coatings were investigated.The results show thatthere was a mutual promotion effect between the 6870 emulsion-type amine curing agent,299 thickener and LT bentonite.When the dosage of 299 thickener was 0.5%and the dosage of LT bentonite was 0.3%,with 6870 emulsion-type amine curing agent,it could produce a thixotropic index of 4.5,anti-sagging limiting film thickness of 475μm,and excellent comprehensive performance of two-component waterborne epoxy coatings.

关 键 词：双组分水性环氧涂料 施工性 增稠剂 流变助剂 乳液型胺固化剂 

分 类 号：TQ637.81[化学工程—精细化工]