摘要
选用异佛尔酮二异氰酸酯(IPDI)、封闭剂3,5-二甲基吡唑(DMP)、可阳离子化扩链剂三乙醇胺(TEOA)、含氟丙烯酸酯单体ZonylTM及其它丙烯酸酯单体合成了用于含氟阴极电泳(CED)涂料的阳离子型丙烯酸酯树脂和阳离子型封闭异氰酸酯固化剂(TId).通过傅立叶变换红外光谱对合成的树脂和固化剂进行了表征;采用差示扫描量热、热重分析法分析了CED涂料的固化行为,发现CED膜可在较低温度(90℃附近)开始交联.对含氟CED膜接触角的测定证实,含氟阴极电泳涂料是得到低表面能涂层的有效方法.利用电化学阻抗谱对漆膜的耐腐蚀性进行了分析,发现含氟丙烯酸酯的引入可以提高漆膜的防腐性能.
Cationic fluorinated acrylic ester resin for cathodic electrodepositing （CED） coating and cationic blocked-diisocyanate TId were synthesized by the polymerization of isophorone diisocyanate （IPDI）, cationic triethanolamine （ TEOA）, ZonylTM and some other acrylic ester monomers, with 3,5-dimethylpyrazole （DMP） as the blocking agent. The compositions of the two products were then characterized using FT-IR spectra, and the curing behaviors of CED coating were analyzed by means of DSC and TGA. The results indicate that CED coating tends to crosslink at about 90 ℃. Moreover, the contact angle test of CED film shows that the fluorinated CED coating is an effective way to low-energy surface. Moreover, with the newly-designed cationic cross-linker TId, the thermal degradation of the fluorinated side chains in the CED resin was successfully avoided. The electrochemical impedance spectroscopy （EIS） of the fluorinated CED film reveals that the introduction of fluorinated acrylic ester helps to improve the corrosion resistance of the film.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第7期111-116,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金资助项目(015036
2005B10301010)
关键词
含氟丙烯酸树脂
阴极电泳涂料
表面能
低温固化
腐蚀性能
fluorinated acrylic resin
cathodic electrodeposition coating
surface energy
low-temperature curing
corrosion resistance
