Hydrophobic filler mixtures, process for its production and use
    12.
    发明授权
    Hydrophobic filler mixtures, process for its production and use 失效
    疏水性填料混合物,其生产和使用过程

    公开(公告)号:US4307023A

    公开(公告)日:1981-12-22

    申请号:US165645

    申请日:1980-07-03

    CPC classification number: C08K3/36 C08K9/06

    Abstract: There is produced a hydrophobic mixture for RTV and LTV silicone rubber by applying a hydrophobizing agent to a precipitated silica, homogeneously mixing this powdery concentrate into a pyrogenically produced silica, tempering the mixture and mechanically compacting. The hydrophobic filler mixture obtained in the untempered condition consists of:Pyrogenically produced silica: 50 to 85 weight %Precipitated silica: 5 to 40 weight % (e.g. 5 to 30 weight %)Hydrophobization agent: 8 to 30 weight %Aluminum oxide: 0.5 to 5 weight %.

    Abstract translation: 通过将疏水化剂施用到沉淀二氧化硅上,将该粉末状浓缩物均匀地混合到热解法生产的二氧化硅中,回火混合物并机械压实,产生RTV和LTV硅橡胶的疏水性混合物。 在未回火条件下获得的疏水性填料混合物包括:热解产生的二氧化硅:50至85重量%沉淀二氧化硅:5至40重量%(例如5至30重量%)疏水化剂:8至30重量%氧化铝:0.5至 5重量%。

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