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    Extrudable silicone elastomer with improved mold release
    3.
    发明授权
    Extrudable silicone elastomer with improved mold release 失效
    具有改善脱模性能的可挤出硅酮弹性体

    公开(公告)号：US5563211A

    公开(公告)日：1996-10-08

    申请号：US543430

    申请日：1995-10-16

    申请人： Diane M. Kosal ,  Melanie J. Van der Veen

    发明人： Diane M. Kosal ,  Melanie J. Van der Veen

    IPC分类号： C08L83/06 ,  C08K9/06 ,  C08L83/07 ,  C08K5/24 ,  C08L83/04

    CPC分类号： C08K9/06

    摘要： A composition curable to a silicone elastomer is prepared by mixing a triorganosiloxy endblocked polydimethylsiloxane fluid where the triorganosiloxy is dimethylvinylsiloxy or methylphenylvinylsiloxy, a reinforcing silica having a surface treated with organosiloxane groups which contain 0.05 to 0.32 percent by weight vinyl, a hydroxy end-terminated polydiethylsiloxane fluid, an organohydrogensiloxane fluid, a platinum catalyst, and optionally a platinum catalyst inhibitor. The triorganosiloxy endblocked polydimethylsiloxane fluid has a major peak molecular weight of 68,000 to 135,000, a dispersity index greater than 3.8, the lowest molecular weight species between 854 and 3146 and the highest molecular weight species between 174,000 and 370,000. These compositions are readily extrudable under low pressure, have improved pot-life, cure to high strength elastomers with a high durometer, and have improved mold release.

    摘要翻译： 通过混合三有机甲硅烷氧基封端的聚二甲基硅氧烷流体，其中三有机甲硅烷氧基是二甲基乙烯基甲硅烷氧基或甲基苯基乙烯基甲硅烷氧基，具有用有机硅氧烷基处理的表面的增强二氧化硅，其含有0.05至0.32重量％的乙烯基，羟基封端的聚二乙基硅氧烷 流体，有机氢硅氧烷流体，铂催化剂和任选的铂催化剂抑制剂。 三有机甲硅烷氧基封端的聚二甲基硅氧烷流体的主峰分子量为68,000至135,000，分散指数大于3.8，最低分子量物种在854和3146之间，最高分子量物种在174,000和370,000之间。 这些组合物在低压下易于挤出，具有改善的适用期，固化成具有高硬度的高强度弹性体，并具有改进的脱模性能。

    Neutralization of alkali metal catalysts in organopolysiloxanes
    6.
    发明授权
    Neutralization of alkali metal catalysts in organopolysiloxanes 失效
    碱金属催化剂在有机聚硅氧烷中的中和

    公开(公告)号：US4625011A

    公开(公告)日：1986-11-25

    申请号：US530296

    申请日：1983-09-08

    申请人： Diane M. Kosal ,  Myron T. Maxson

    发明人： Diane M. Kosal ,  Myron T. Maxson

    IPC分类号： C08G77/32 ,  C08G77/34 ,  C08G77/06

    CPC分类号： C08G77/34 ,  C08G77/32

    摘要： A process for the neutralization of the alkali metal catalyst in a polymerized organopolysiloxane where the alkali metal content of the resulting organopolysiloxane is significantly reduced, is described. The process consists of neutralizing the alkali metal salt with a straight-chain carboxylic acid of general formula ZCOOH, where Z is a hydrocarbon group containing at least two carbon atoms, and thereafter filtering the organopolysiloxane. The same ZCOOH carboxylic acids may be added to organopolysiloxanes which have previously been neutralized with either carbon dioxide or acetic acid in order to significantly reduce the alkali metal content of the organopolysiloxane after filtration. Organopolysiloxanes containing less than 0.5 ppm K.sup.+ can be easily obtained.

    摘要翻译： 描述了在所得有机聚硅氧烷的碱金属含量显着降低的聚合有机聚硅氧烷中中和碱金属催化剂的方法。 该方法包括用通式ZCOOH的直链羧酸中和碱金属盐，其中Z是含有至少两个碳原子的烃基，然后过滤有机聚硅氧烷。 可以将相同的ZCOOH羧酸加入预先用二氧化碳或乙酸中和的有机聚硅氧烷中，以显着降低过滤后的有机聚硅氧烷的碱金属含量。 含有小于0.5ppm K +的有机聚硅氧烷可以容易地得到。