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在硅酮胶应用制备过程中如何 选择 使用硅烷偶联剂? Q : How to choose silane coupling agent in the preparation process of silicone adhesive application ?

:在硅酮胶中硅烷偶联剂的选择对胶的性能影响还是比较大的。 A : The choice of silane coupling agent in silicone adhesive has a relatively large influence on the performance of the adhesive.

型硅酮胶 :酸性胶使用的偶联剂比较少,现在常用主要是 D - 11 二叔丁氧基二乙酰氧基硅烷,能提高酸性胶对金属的粘结性。 Deacidifying silicone adhesive : acidic adhesives use fewer coupling agents, and now commonly used is mainly D - 11 di-tert-butoxydiacetoxysilane, which can improve the adhesion of acidic adhesives to metals.

肟型 硅酮胶 :酮肟型常用的硅烷偶联剂主要有 LT- 550 LT- 560 LT- 792 De- oxime type silicone glue : The ketone oxime type commonly used silane coupling agents are mainly LT- 550 , LT- 560 and LT- 792 . LT- 550 LT- 792 能提高胶的粘结性和储存稳定性, LT- 792 的粘结性优于 LT- 550 , 储存稳定性和 黄变 方面 LT- 550 优于 LT- 792, LT- 560 能提高胶的固化强度和固化速度,但是过量添加 偶联剂 会影响 硅酮 胶的储存稳定性和 黄变 Among them, LT- 550 and LT- 792 can improve the adhesion and storage stability of the adhesive . LT- 792 has better adhesion than LT- 550 , and LT- 550 is better than LT- 792 in terms of storage stability and yellowing resistance. , LT- 560 can improve the curing strength and curing speed of the adhesive, but excessive addition of coupling agent will affect the storage stability and yellowing resistance of the silicone adhesive .

型硅酮胶 :醇型常用的硅烷偶联剂有 LT- 171 LT- 550 LT- 560 LT- 792 De- alcohol type silicone glue : silane coupling agents commonly used in alcohol type are LT- 171 , LT- 550 , LT- 560 and LT- 792 . LT- 550 LT- 792 能提高胶的粘结性和降低胶 储存稳定性,同时 造成 黄变; 171 560 能提高胶的固化速度和储存稳定性,但是对粘结性的提 升幅度有限 Among them, LT- 550 and LT- 792 can improve the adhesiveness of the adhesive and reduce the storage stability of the adhesive, and at the same time easily cause yellowing of the adhesive ; 171 and 560 can improve the curing speed and storage stability of the adhesive, but the The improvement is limited .