The invention belongs to the technical field of three-proof glue preparation, in particular to an organosilicon three-proof glue and its preparation method and application. The organosilicon tri-rubber contains the following raw materials: end-group hydrogen-containing silicone oil crosslinking agent, gas phase silica, vinyl MQ resin, tackifier, inhibitor, platinum catalyst and end-vinyl silicone oil. The required raw materials are few, the cost is low, and the preparation method is simple; the three-proof adhesives are non-toxic and harmless without adding organic solvents in the preparation process, which meets the national environmental protection requirements; the three-proof adhesives have fast curing speed and can be cured within 80 minutes at room temperature; the three-proof adhesives can be cured within 20 minutes in an oven at 80 C. During the curing process, the surface drying time of the film was 1-4 min, the hardness of the film was 29-47 shore A, and the peeling strength was 1.2-2.8 N/mm. The obtained film can protect the device from the erosion of the environment, realize the function of waterproof, dust-proof and anti-corrosion, effectively improve the stability and reliability of electronic components, and has good application prospects.
【技术实现步骤摘要】
一种有机硅三防胶及其制备方法与应用
本专利技术属于三防胶制备
,具体涉及一种有机硅三防胶及其制备方法与应用。
技术介绍
在电子、电工及电器领域,为了保护器件免受坏境的侵蚀,人们通常在线路板、电子元器件和电器模块等的表面涂附三防胶,又称披覆胶的产品;固化后成一层透明保护薄膜,具有优越的绝缘、防潮、防漏电、防震、防尘、防硫化、防盐雾、防腐蚀、防老化、耐电晕等性能。目前,工业上应用的三防胶产品,主要有有机硅类、聚氨酯类和丙烯酸类等三种。其中,有机硅类三防胶产品,具有耐高低温、电气绝缘、耐臭氧、耐辐射、阻燃、憎水等优异特性,在工业上应用最为广泛。目前,硅胶体系的三防胶主要有缩合型室温固化型和加成型室温固化型两种。中国专利CN106566463A公开了一种单组分、缩合型、有溶剂的有机硅苯基披覆胶及其制备方法:聚甲基苯基硅氧烷、直链脂肪烃溶剂油稀释剂、烷氧基硅烷交联剂、催化剂、增粘剂等混配制备出披覆胶。端羟基硅油与烷氧基硅烷发生缩合脱醇反应,室温下2~10min内表干;固化7天后,胶膜深度固化,具有较高的硬度,且有一定韧性、抗摩擦及抗弯折能力。该种披覆胶,由于使用了大量的正庚烷、环保溶剂油等稀释剂,可用于喷涂、浸涂、刷涂、流涂等工艺。中国专利CN103666250A公开的单组分、缩合型、有溶剂的有机硅披覆胶工艺类似,只是在增强剂上选用MQ树脂,在催化剂上有所不同。中国专利CN106281208A公开了一种双组分、缩合型、有溶剂的有机硅三防胶的制备方法:混合稀释剂、端羟基硅油、催化剂和偶联剂等制备AB组分;在室温下,1小时表干,24小时固化。涂覆在LED灯条及显示 ...
【技术保护点】
1.一种有机硅三防胶,其特征在于,包含如下按照质量百分比计的原料:端基含氢硅油交联剂9%~20%、气相白炭黑0~4%、乙烯基MQ树脂60%~73%、增粘剂1%~5%、抑制剂1%~3%和端乙烯基硅油余量,上述原料质量总计为100%;另外添加上述原料总质量5~50ppm的铂催化剂。
【技术特征摘要】
1.一种有机硅三防胶,其特征在于,包含如下按照质量百分比计的原料:端基含氢硅油交联剂9%~20%、气相白炭黑0~4%、乙烯基MQ树脂60%~73%、增粘剂1%~5%、抑制剂1%~3%和端乙烯基硅油余量,上述原料质量总计为100%;另外添加上述原料总质量5~50ppm的铂催化剂。2.根据权利要求1所述的有机硅三防胶,其特征在于:所述的端基含氢硅油交联剂的含氢质量为0.25~0.48%。3.根据权利要求1所述的有机硅三防胶,其特征在于:所述的乙烯基MQ树脂的乙烯基质量含量为1.0~2.4%。4.根据权利要求1所述的有机硅三防胶,其特征在于:所述的增粘剂为乙烯基甲基二甲氧基硅烷、乙烯基三甲氧基硅烷、乙烯基三乙氧基硅烷和乙烯基甲基二乙氧基硅烷中的一种或者两种以上;所述的抑制剂为1-乙炔基-1-环己醇。5.权利要求1~4任一项所述的有机硅三防胶的制备方法,其特征在于,包括以下步骤:(1)乙烯基组分的制备:将端乙烯基硅油和液体的乙烯基MQ树脂混合,分批次加入气相白炭黑,搅拌均匀,反应后冷却到室温,再加入增粘剂,得到澄清透明的乙烯基组分;(2)三防胶的制备:将步骤(1)中得到的乙烯基组分、抑...
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