Silicone Modified Polyesters Vulcanizable at Room Temperature for Anti-corrosion Coatings on Tinplate  

作　　者：GAN Qimao WANG Li HUANG Long HUANG Ronghua 甘启茂;WANG Li;HUANG Long;黄荣华(School of Power&Mechanical Engineering,Wuhan University,Wuhan 430072,China;Engineering Center of New Tobacco Product,China Tobacco Hubei Industrial,Wuhan 430040,China;College of Civil Engineeringand Architecture,Zhejiang University,Hanzhou 310058,China)

机构地区：[1]School of Power&Mechanical Engineering,Wuhan University,Wuhan 430072,China [2]Engineering Center of New Tobacco Product,China Tobacco Hubei Industrial,Wuhan 430040,China [3]College of Civil Engineeringand Architecture,Zhejiang University,Hanzhou 310058,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2022年第3期525-532,共8页武汉理工大学学报（材料科学英文版）

摘　　要：Trimethoxysilyl Polyester(TMOS-PET)was prepared via hydrosilylation of trimethylsilane with acryl-terminated polyester.Copolymerization of TMOS-PET with trimethylmethoxysilane,tetramethoxysilane,and/or dimethyldimethoxysilane give silicone modified polyesters(Si-PET)containing=(SiO_(2))=,-(CH_(3)SiO_(3/2))=,and/or-((CH_(3))_(2)SiO)-units.Coatings from Si-PET were formed on tinplate surface via room temperature vulcanization with applicable curing time(the quickest tact free time and completely drying time are 2 h and 15 h,respectively).Mechanical properties,thermal stability,chemical resistance,and anti-corrosion of coatings were detected.Although the flexibility of the coatings were lowered by=(SiO_(2))=and-(CH_(3)SiO_(3/2))=units,adhesion and thermal stability of coatings were both improved.On the contrary,(CH_(3))_(2)SiOunits seem to improve the flexibility,while decrease the adhesive force for less crosslink points.Generally,the silicone modified polyesters act as an effective shielding for tinplate.According to electrochemical impedance spectroscopy(EIS),the electric resistance of coatings(Rc)were improved about 25 times and open circuit potential(OCP)increased about 0.10 V compared to the control.The chemical resistance and anti-corrosion of the coatings were decreased slightly after=(SiO_(2))=and-(CH_(3)SiO_(3/2))=units were added,but they could be greatly improved by-(CH_(3)SiO_(3/2))=units.Specially,after adding-(CH_(3)SiO_(3/2))=units,coatings give doubled Rc,and its OCP is about 0.20 V higher than the control.

关 键 词：silicone modified polyester COATINGS electrochemical impedance spectroscopy mechanical property thermal stability 

分 类 号：TQ630.43[化学工程—精细化工]