水性有机硅耐高温涂料的制备与性能研究

Preparation and Properties of Waterborne High Temperature Resistant Silicone Coatings

通过对成膜树脂、颜填料及低熔点玻璃粉等的筛选,研制出一种耐高温水性有机硅涂料。研究了不同成膜树脂、防锈颜料的种类及用量、不同熔点玻璃粉的种类及用量等对耐高温水性有机硅涂料的力学、耐水、耐盐雾等性能的影响。结果表明:以DOW-8016树脂为成膜树脂,添加9%三聚磷酸铝、10%~15%型号为GT-45的低熔点玻璃粉时,涂层的综合性能最好:附着力为1级、铅笔硬度为HB、柔韧性为0.5 mm、抗冲击强度为50 kg·cm、耐水24 h及耐盐雾48 h,由于低熔点玻璃粉的熔融粘结作用,涂层在600℃保温3 h后可耐盐雾240 h。

Through the screening of film-forming resin,pigments and glass powder,a high temperature resistant waterborne silicone coating was developed.The effects of different film-forming resins,types and amounts of antirust pigments,types and amounts of glass powder with different melting points on the mechanical properties,water resistance,salt fog resistance were studied.The experimental results show that when Dow-8016 resin is used as film-forming resin,9%aluminum tripolyphosphate,10%~15%GT-45 low melting point glass powder are added,the comprehensive properties of the coating are the best:adhesion is grade 1,pencil hardness is HB,flexibility is 0.5mm,impact strength is 50 kg·cm,water resistance for 24 h and salt spray resistance for 48 h.Due to the melting and bonding effect of low melting point glass powder,The coating can withstand salt spray for 240 h after holding at 600℃for 3 h.