聚酯改性丙烯酸聚氨酯2K汽车修补漆的研制

Preparation of Automotive Refinishing Paint of Two Package Acrylic Polyurethane Modified by Polyester

以聚酯树脂对丙烯酸聚氨酯体系进行改性,制备了一种性能优异的2K汽车修补漆。讨论了丙烯酸树脂、聚酯及其加入量、固化剂、n(—NCO)/n(—OH)值、流平剂、防沉剂对漆膜性能的影响,结果表明,当丙烯酸树脂与CARDURA E10(叔碳酸缩水甘油酯)改性聚酯树脂的质量比在(5～3)∶1,以N3390为固化剂,且n(—NCO)/n(—OH)=1.08～1.15,丙烯酸流平剂与有机硅流平剂质量比为10∶3,防沉剂的质量分数为0.54%时,漆膜的性能最佳。

A kind of two-package automotive refinishing paint of superior performance was prepared from acrylic-polyurethanes modified by polyester resin. The effect of acrylic resin, polyester resin and its amount,curing agent, the molar ratio of -NCO/-OH, leveling agent, and anti-settling agent on the film properties was studied. The results show that the film had the best performance when the mass ratio of acrylic resin to polyester resin modified by CARDURA E10（versatate glycidyl） was （5 -3）：1, N3390 was used as curing agent,the molar ratio of -NCO/-OH was 1.08 - 1.15 ,the ratio of acrylic leveling agent and silicone leveling agent was 10：3, and the quantity percentage of anti-settling agent was 0. 54% ,the paint film exhibited the best performance.