发泡型灌封硅胶组合物

Foaming type encapsulating silica gel composition

Abstract

双组分型的发泡灌封硅胶组合物,它包括A组分和B组分,其中A组分包括:a1)100重量份的基础硅胶,a2)15~50重量份的高含氢量的含氢硅油,a3)2~10重量份的低含氢量的含氢硅油,a4)0或0.001~3.0重量份的色料或色母料;B组分包括:b1)100重量份的基础硅胶,b2)0.1~1.2重量份的过渡金属化合物催化剂,b3)0.05~1.0重量份的阻聚剂;b4)0或0.001~3.0重量份的色料或色母料;前提条件是:a4)与b4)不同时存在,或者,a4)的颜色与b4)的颜色不同;其中在配制组合物时,A:B的重量比是0.5-2:1、优选0.6-1.8:1。发泡灌封硅胶,它是A和B两种组分混合在一起进行发泡和固化反应而形成的。
The invention relates to a foaming type encapsulating silica gel composition. The foaming type encapsulating silica gel composition comprises a component A and a component B, wherein the component A comprises the following ingredients in parts by weight: (a1) 100 parts of base silica gel, (a2) 15-50 parts of high-hydrogen-content hydrogen-containing silicone oil, (a3) 2-10 parts of low-hydrogen-content hydrogen-containing silicone oil and (a4) 0 or 0.01-3.0 parts of pigments or color concentrates; the component B comprises the following ingredients in parts by weight: (b1) 100 parts of base silica gel, (b2) 0.1-1.2 parts of transition metal compound catalysts, (b3) 0.05-1.0 part of polymerization inhibitor and (b4) 0 or 0.001-3.0 parts of the pigments or the color concentrates; a precondition is that (a4) and (b4) cannot exist at the same time, or (a4) and (b4) are different in color; and when the composition is prepared, the weight ratio of A to B is 0.5-2:1, preferably 0.6-1.8:1. Foaming type encapsulating silica gel is formed by mixing the component A and the component B and carrying out foaming and curing reaction.

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