| QIU Wei,DING Yue,ZHANG Jing-yuan.Preparation of Oil Shrinkage Cavity-resisting Cathodic Electrodeposition Coating[J],42(6):106-108,112 |
| Preparation of Oil Shrinkage Cavity-resisting Cathodic Electrodeposition Coating |
| Received:July 08, 2013 Revised:August 16, 2013 |
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| DOI： |
| KeyWord:cathodic electrodeposition coatings crosslinking agent oil shrinkage cavity Sharp edge corrosion |
| Author | Institution |
| QIU Wei |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| DING Yue |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| ZHANG Jing-yuan |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Objective The preparation of oil shrinkage cavity-resisting cathodic electrodeposition coating was introduced. Methods A blocked polyisocyanate with low deblocking temperature was prepared. It was quantitatively added as crosslinking agent for cathodic electrodeposition coatings. Then the oil shrinkage cavity-resisting performance, corrosion performance, and the appearance of coating film were investigated. Results The results showed that the suitable addition amount was 1 . 0 % ~ 1 . 5 % of the total cationic resin weight . The coating film had good appearance. The oil shrinkage cavity-resisting performance was excellent, and even no oil shrinkage cavity appeared when the addition amount was 1 . 5 % . The salt spray resistance reached up to 1032 h and the sharp edge corrosion resistance achieved up to level 1 . Conclusion Adding the appropriate low-temperature crosslinking agent can significantly improve the oil shrinkage cavity-resisting performance of electrophoretic paint film. |
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