有机锡螯合物对聚氨酯体系的催化效率研究
Catalytic efficiency of organotin chelates on polyurethane system
马晓阳 1黎家强 2吴贞贤2
作者信息
- 1. 华南理工大学,广东 广州 510641;清远高新华园科技协同创新研究院有限公司,广东 清远 511517
- 2. 清远高新华园科技协同创新研究院有限公司,广东 清远 511517
- 折叠
摘要
研究了乙酸、乙酰丙酮和乙酰乙酸乙酯和有机锡形成的螯合物对丙烯酸聚氨酯体系凝胶时间的影响.通过测试不同温度下的凝胶时间,得到体系的反应活化能与指前因子,从而剖析了各类有机锡螯合物对聚氨酯体系的催化反应效率和反应机理.结果表明,乙酸、乙酰丙酮作为螯合剂对聚氨酯体系的反应速率影响较大,乙酰乙酸乙酯的影响不明显.此外,螯合剂的加入延长了漆膜的表干时间和实干时间,而对涂层的硬度、附着力和耐冲击等性能影响不大.
Abstract
The influence of the chelates formed by acetic acid,acetylacetone,ethyl acetoacetate and organotin on the gel time of the acrylic polyurethane system was studied.The reaction activation energy and pre-exponential factor were obtained by measuring the gel time at different temperatures,and the catalytic reaction efficiency and reaction mechanism of various organotin chelates on the polyurethane system were analyzed.The results showed that acetic acid and acetylacetone as chelating agents had a significant impact on the reaction rate of the polyurethane system,while the effect of ethyl acetoacetate was not significant.In addition,the addition of chelating agents prolonged the surface and solid drying time of the paint film,while having little effect on the hardness,adhesion,and impact resistance of the coating.
关键词
有机锡螯合物/聚氨酯/催化效率/反应机理Key words
organotin chelate/polyurethane/catalytic efficiency/reaction mechanisms引用本文复制引用
出版年
2024
NETL
NSTL
万方数据