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    Preparation of organopolysiloxane gum
    8.
    发明公开
    Preparation of organopolysiloxane gum 有权
    Verfahren zur Herstellung vom Polyorganosiloxangummi

    公开(公告)号：EP1006139A1

    公开(公告)日：2000-06-07

    申请号：EP99309688.2

    申请日：1999-12-02

    申请人： SHIN-ETSU CHEMICAL CO., LTD.

    发明人： Takahashi, Masaharu, Gunma Complex ,  Hagiwara, Yutaka, Gunma Complex

    IPC分类号： C08G77/06 ,  C08G77/08 ,  C08G77/10

    CPC分类号： C08G77/32 ,  C08G77/06 ,  C08G77/20

    摘要： An organopolysiloxane gum is continuously prepared by (I) mixing at least one cyclopolysiloxane with an end capping agent, (II) feeding the mixture to a self-cleaning reactor along with an alkaline polymerization catalyst, and effecting polymerization at a temperature of 100 to 250°C and under subatmospheric pressure, (III) continuously adding a neutralizing agent to the reaction mixture of step (II), thereby terminating the polymerization reaction, and (IV) continuously removing the cyclopolysiloxane and volatile components from the reaction mixture.

    摘要翻译： 通过（I）将至少一种环状聚硅氧烷与封端剂混合来连续制备有机聚硅氧烷胶，（II）将该混合物与碱性聚合催化​​剂一起进料至自清洁反应器，并在100-250℃的温度下进行聚合 并在低于大气压的压力下，（III）向步骤（II）的反应混合物中连续加入中和剂，由此终止聚合反应，和（IV）从反应混合物中连续除去环状聚硅氧烷和挥发性组分。

    Process for producing a silicone polymer
    10.
    发明公开
    Process for producing a silicone polymer 有权
    Verfahren zur Herstellung eines Siliconpolymeren

    公开(公告)号：EP0982346A1

    公开(公告)日：2000-03-01

    申请号：EP99306738.8

    申请日：1999-08-25

    申请人： Dow Corning Corporation

    发明人： Currie, John ,  Griffith, Phillip ,  Herron, William ,  Taylor, Richard

    IPC分类号： C08G77/08

    CPC分类号： C08G77/08 ,  C08G77/32

    摘要： A process for producing a silicone polymer having a volatile material content of less than 1% by weight, preferably less than 0.1% by weight, comprises the sequential steps of (i) producing an unstripped silicone polymer by polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring-opening polymerisation, or of a mixture of said linear and cyclosiloxanes, with a phosphazene base in the presence of water and the presence or absence of a filler, (ii) neutralising the catalyst, and (iii) stripping the unstripped silicone polymer, preferably at temperatures of 200°C and above.

    摘要翻译： 挥发性物质含量小于1重量％，优选小于0.1重量％的硅氧烷聚合物的制备方法包括以下顺序步骤：（i）通过使含有硅氧烷的直链硅烷醇基团聚合制备未脱落的硅氧烷聚合物 或通过开环聚合的环硅氧烷，或所述线性和环硅氧烷的混合物与磷腈碱在水的存在下以及存在或不存在填料，（ii）中和催化剂，和 （iii）优选在200℃以上的温度下汽提未着色的有机硅聚合物。