为解决西北地区环境条件下,湿固化丙烯酸改性聚硅氧烷涂料漆膜脆、与环氧中间漆的配套层间附着力差、漆膜易脱落开裂等问题,探讨了氢化双酚A环氧树脂对丙烯酸改性聚硅氧烷树脂的共混改性、温湿度及涂装间隔时间等对配套性的影响,确定了最佳的氢化双酚A环氧树脂用量、涂装时间间隔、温度和湿度。结果表明:氢化双酚A环氧树脂用量为1%~3%,可有效提高湿固化丙烯酸改性聚硅氧烷面漆的漆膜柔韧性;涂装间隔时间控制在8 h以内,环境温度在5~40℃、相对湿度在30%~80%,涂层体系配套性能优异,层间附着力最好。

In order to solve the problems of brittle film of moisture-curing acrylic modified polysiloxane coating,poor adhesion between the matching layer and epoxy intermediate paint,and easy peeling and cracking of the paint film,the effects of hydrogenated bisphenol A epoxy resin on the blending modification of acrylic modified polysiloxane resin,temperature and humidity and coating interval time on the compatibility were discussed.The optimum dosage of hydrobisphenol A epoxy resin,coating time interval,temperature and humidity were determined.The results show that the film flexibility of wet cured acrylic modified polysiloxane finish can be improved effectively when the dosage of hydrobisphenol A epoxy resin is 1%~3%.The coating interval time is controlled within 8 hours,the ambient temperature is controlled between 5~40℃,and therelativehumidity iscontrolled between 30%~80%.Thecoatingsystemhas excellent matching performance and the best interlayer adhesion.