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    • 5. 发明申请
    • SILICONE RUBBER POWDER AND METHOD OF MANUFACTURING THEREOF
    • 硅橡胶粉及其制造方法
    • WO2009028433A1
    • 2009-03-05
    • PCT/JP2008/065067
    • 2008-08-19
    • DOW CORNING TORAY CO., LTD.MORITA, YoshitsuguKOBAYASHI, KazuoTANAKA, Ken
    • MORITA, YoshitsuguKOBAYASHI, KazuoTANAKA, Ken
    • C08J3/12C08J3/24C08J3/26
    • C08K5/5435C08G77/12C08G77/16C08J3/24C08J3/26C08J2383/04C08K5/57C08L83/04C08L83/00
    • A silicone rubber powder obtained by curing a condensation-curable silicone rubber composition in a dispersed state in water, having an epoxy equivalent measured by a titration method equal to or lower than 3,000 and an average particle size in the range of 0.1 to 100 ?m; and a method of manufacturing a silicone rubber powder comprising the steps of dispersing in water a silicone rubber composition comprising at least components (A) through (C) listed below; adding component (D); and curing the mixture: (A) a diorganopolysiloxane capped at both molecular terminals with silanol groups and having in one molecule 30 or less silicon atoms; (B) an organopolysiloxane having in one molecule at least two silicon-bonded hydrogen atoms; (C) an epoxy-containing alkoxysilane; and (D) a condensation-reaction catalyst. The silicone rubber powder has low epoxy equivalent and possesses excellent dispersibility in organic resins, and the method is efficient in manufacturing of the aforementioned powder.
    • 将分散状态的可缩合固化性硅酮橡胶组合物在水中固化而得到的硅橡胶粉末,其通过滴定法测定的环氧当量为3000以下,平均粒径为0.1〜100μm ; 和一种制造硅橡胶粉末的方法,包括以下步骤:在水中分散包含至少包含下列组分(A)至(C)的组分的硅橡胶组合物; 添加组分(D); 并固化该混合物:(A)在两个分子末端用硅烷醇基封端并且在一个分子中具有30个或更少硅原子的二有机聚硅氧烷; (B)在一个分子中具有至少两个与硅键合的氢原子的有机聚硅氧烷; (C)含环氧基的烷氧基硅烷; 和(D)缩合反应催化剂。 硅橡胶粉末具有低环氧当量,并且在有机树脂中具有优异的分散性,并且该方法在制备上述粉末中是有效的。