Process for the preparation of branched polyorganosiloxanes
    2.
    发明授权
    Process for the preparation of branched polyorganosiloxanes 有权
    制备支链聚有机硅氧烷的方法

    公开(公告)号:US07829647B2

    公开(公告)日:2010-11-09

    申请号:US12187649

    申请日:2008-08-07

    IPC分类号: C08G77/06 C08G77/04 C08G77/12

    CPC分类号: C08G77/08 C08G77/10 C08K5/098

    摘要: The invention relates to a process for the preparation of branched siloxanes containing R—SiO3/2 units, where R=organic radical, wherein straight-chain polysiloxanes containing silane hydrogen in the polymer chain are reacted in the presence of ammonium or metal carboxylates as a catalyst in the absence of hydroxy-functional organic compounds, and to siloxanes thus prepared and the use thereof in the preparation of polyurethane foams and antifoam formulations.

    摘要翻译: 本发明涉及一种制备含有R-SiO 3/2单元的支链硅氧烷的方法,其中R =有机基,其中在聚合物链中含有硅烷氢的直链聚硅氧烷在铵或金属羧酸盐存在下反应,作为 在不存在羟基官能的有机化合物的情况下的催化剂,以及由此制备的硅氧烷及其在制备聚氨酯泡沫和消泡剂配方中的用途。