|
| Preparation and Construction of Graded Epoxy Coating |
| Received:December 17, 2019 Revised:December 26, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.05.017 |
| KeyWord:epoxy resin polysiloxane graded material coating weatherability anticorrosive |
| Author | Institution |
| ZHANG Xin-yue |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Xiamen, , China |
| CHEN Kai-feng |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Xiamen, , China |
| QI Hai-xia |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Xiamen, , China |
| LIANG Yu |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Xiamen, , China |
| ZHANG Li-li |
State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute LSMRI, Xiamen, , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The paper aims toimprove the weatherability of epoxy coatings and simplify the construction process of multilayer coating systems. Amino-functional silicone resin and polyamide were used as curing agents to jointly cure epoxy resin. Based on the surface migration characteristics of polysiloxane segments in silicone resin, a polysiloxane / epoxy graded materials coating was prepared. The effects of the amount of silicone resin and the solvent on the coating composition and structure were discussed. Scanning electron microscope-X-ray energy spectroscopy (SEM-EDS), infrared spectroscopy (FTIR), and water contact angle were used to characterize the coating structure. When the mass ratio of amino-functional silicone resin to polyamide was 2:8 and the ratio of solvent was txylene:butanol=1:1, the surface of the obtained coating was rich in polysiloxane and the bottom was rich in polyamide chain of graded structure. The graded coating had no blistering, no cracking, no rust after 960h salt spray aging, showing excellent corrosion resistance. And after 960h accelerated UV aging, the light loss rate and the color difference of coating was only 1% and 8.9%, showing that its weatherability was better than that of conventional epoxy coatings. By using amino-functional silicone resin and polyamide to jointly cure epoxy resin, the surface of epoxy coating is rich in polysiloxane segments. The coating forms a graded structure with functions of weatherability and anticorrosion integration. |
| Close |
|
|
|