二乙醇胺对环氧阴极电泳涂料固化温度的影响  

Effect of Diethanolamine on Curing Temperature of Epoxy Cathodic Electrodeposition Coatings

作　　者：李涛 朱维迪 胡东波 孙家娣 陈兴兰 陈卫东 Li Tao;Zhu Weidi;Hu Dongbo;Sun Jiadi;Chen Xinglan;Chen Weidong(CNOOC Changzhou Paint and Coatings Industry Research Insititute Co., Ltd., Changzhou, Jiangsu 213016, China)

机构地区：[1]中海油常州涂料化工研究院有限公司,江苏常州213016

出　　处：《涂层与防护》2019年第4期6-6,7-9,14,共3页Coating and Protection

摘　　要：在环氧阴极电泳涂料的生产过程中,采用胺对环氧基团开环是重要的一步反应。由开环反应得到的羟基,在一定温度下与封闭异氰酸酯发生交联反应,得到坚韧耐用、满足各项需求的电泳漆漆膜。本研究针对二乙醇胺用量对环氧阴极电泳涂料固化温度的影响进行研究,发现在其他条件完全相同的情况下,随着二乙醇胺用量的增加,漆膜的固化温度会逐渐降低。当环氧基:二乙醇胺=2∶1(物质的量的比)时,固化温度为145℃;当环氧基:二乙醇胺=1.8∶1时,固化温度140℃;环氧基:二乙醇胺=1.5∶1时,固化温度可低至130℃。进一步提高二乙醇胺用量,则会影响最终的乳化效果,对乳液稳定性产生负面影响。A ste of using amine to conduct an ring -opening reaction of the epoxy group is improtant during the production of epoxy cathodic electrodepostiton coatings. The hydroxyl group obtained from the ring -opening reaction is reacted with the block isocyanate at the processed temperature to form a electrodeposition film with toughness and good comprehensive properties. In this article, the effect of diethanolamine dosage on the curing temperature of the epxoy cathodic electrodepostion coatings has been investigated. The results show that the increase of diethanolamine dosage might lead to the decrease of the curing temperature. Specifically, the curing temperatue is 145 ℃, 140℃ and 130 ℃respectively when the mol ratio of epoxy group and diethanolamine is 2:1, 1.8:1 and 1.5:1 respectively. Meanwhile, higher dosage of diethanolamine gives an negative effect on emulsifying efficiency and emulsion stability.

关 键 词：二乙醇胺 环氧阴极电泳涂料 封闭异氰酸酯 固化温度 

分 类 号：TQ630.72[化学工程—精细化工]