硅橡胶表面抗磨聚氨酯涂料

硅橡胶表面抗磨聚氨酯涂料 Abrasion-Resistant Polyurethane Coating for Silicone Rubber Surface 龚淑玲 GONG Shu-ling 1 2 first-author 王巍 WANG Wei 1 2 王鹏 WANG Peng 1 2 陈金龙 CHEN Jin-long 1 2 武汉大学化学与分子科学学院 武汉大学化学与分子科学学院 College of Chemistry and Molecular Sciences, Wuhan University College of Chemistry and Molecular Sciences, Wuhan University 武汉大学化学与分子科学学院,湖北,武汉,430072 武汉大学化学与分子科学学院,湖北,武汉,430072 用聚酯二元醇与甲苯二异氰酸酯反应合成端羟基预聚体 .讨论了溶剂体系及其加入方式、温度对反应的影响 .实验表明 ,在选定的最佳实验条件下反应 ,可得到近无色的成膜性良好的预聚体产品 .将预聚体与苯酚封闭的三羟甲基丙烷 甲苯二异氰酸酯加成物混合配制成单组分聚氨酯涂料 .探讨了硅橡胶表面的处理方式、聚氨酯预聚体的分子量、涂料中软段硬段比例等对漆膜性能的影响 .结果表明 ,预聚体分子量为 1× 10 4～ 1× 10 5,硬段含量为 38.1%的聚氨酯涂料 ,涂覆在经底涂处理的硅橡胶表面 ,RCA耐磨测试 ,漆膜的耐磨次数达到 135次 The polyester polyurethane prepolymer was prepared from polyester diol with toluene diisocyanate （TDI）, and the influence of temperature and solvent on the quality of prepolymer was discussed. It is shown that the approximately colorless, good performance prepolymer can be obtained under the optimum reaction conditions. Mixing the prepolymer and TDI-TMP adduct produced one-component polyurethane finishing coating. Effecting factors on the properties of coating such as different methods of silicone rubber surface treatment, the molecular weight of prepolymer, content of hard segment were also discussed. The results indicate that coating a polyurethane layer （molecular weight of the prepolymer is 1×10 4-1×10 5, content of hard segment is 38.1%） on the surface of silicone rubber surface with primer treatment can improve abrasion resistance of the coating membrane. 聚氨酯 聚氨酯涂料 抗磨涂料 硅橡胶 polyurethane polyurethane coating abrasion-resistant coating silicone rubber TQ633 2003-04-01 2021-04-01 4