氢氧化铝对有机硅电子灌封胶性能的影响

以端乙烯基硅油为基胶、含氢硅油为交联剂、γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH-570)为表面处理剂、Al(OH)3或Al(OH)3/铂络合物为阻燃剂,制备阻燃型有机硅电子灌封胶。研究结果表明:对Al(OH)3表面进行处理、降低其粒径、增加其含量、Al(OH)3/铂络合物并用等均有利于提升灌封胶的阻燃性能;当w(KH-570)=0.5%相对于Al(OH)3质量而言]、Al(OH)3的平均粒径为2.6μm、m(5.0μmAl2O3):m2.6μm Al(OH)3]=160:40和w(铂络合物)=0.002%(相对于基胶质量而言)时,可制得阻燃性优异的有机硅电子灌封胶。

Influences of Al(OH)_3 on properties of organosilicon electronic-pouring sealant

With a vinyl-terminal silicon oil as matrix,a silicon oil containing hydrogen as cross linker,a γ-methacryloxypropyltrimethoxysilane(KH-570) as surface treatment agent,Al(OH)3 or Al(OH)3/platinum complex compound as flame retardants,an organosilicon electronic-pouring sealant with flame-retardant was prepared.The research results showed that the flame-retardant of pouring sealant could all be enhanced by following methods such as surface treatment of Al(OH)3,reducing its particle sizes and increasing its contents,using Al(OH)3/platinum complex compound,and other methods.The organosilicon electronic-pouring sealant had excellent flame-retardant when mass fraction of KH-570 was 0.5% in Al(OH)3,the average particle size of Al(OH)3 was 2.6 μm,mass ratio of m(5.0 μm Al2O3)∶m2.6 μm Al(OH)3] was 160∶40,and mass fraction of platinum complex compound was 0.002% in matrix.