摘要
分别用双酚A型环氧树脂、氢化双酚A型环氧树脂、柔性环氧树脂合成阴极电泳涂料用成膜树脂,考查了催化剂的用量和反应温度对环氧树脂扩链反应的影响和不同羧酸作为中和剂对乳液储存稳定性的影响。通过检测数据对比,柔性环氧树脂作为阴极电泳涂料的成膜树脂可以提高槽液的泳透力,提高漆膜的柔韧性和耐老化性能,但是会适度降低耐盐雾性能。
A film -forming resin for cathodic electrodepostion coating was synthesized from bisphenol-A type epoxy resin, hydrogenated bisphenol-A type epoxy resin and flexible epoxy resin. In this paper, the effects of the amount of catalyst and reaction temperature on the chain-extending reaction of epoxy resin were discussed. Meanwhile, the effects of different carboxylic acid as neutralizers on the storage stability of emulsion were investigated. By comparing the test data, the film -forming resin based on flexible epoxy resin in the cathodic electrodeposition coating can improve the throwing power of bath solution, the flexibility and aging resistance of the film. However, it reduces the salt spray performance to some extent.
作者
吴让君
唐万军
李晴红
Wu Rangjun;Tang Wanjun;Li Qinghong(Tianmen Waterborne Coating Studio, Tianmen, Hubei 431708, China)
出处
《涂层与防护》
2019年第8期55-59,共5页
Coating and Protection
关键词
柔性环氧树脂
泳透力
羧酸
环氧当量
flexible epoxy resin
throwing power
carboxylic acid
epoxide equivalent
