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《Journal of South China University of Technology(Natural Science Edition)》 2008-07
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Preparation and Corrosion Resistance of Cathodic Electrodeposition Coating Containing Fluorinated Acrylic Ester

Wang Tao Qi Sheng-guang Ren Bi-ye Zhu Yan Tong Zhen(School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China)  
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 trie-thanolamine(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 de-gradation 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.
【Fund】: 广东省自然科学基金资助项目(015036 2005B10301010)
【CateGory Index】: TQ630.7
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