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7 条记录 (耗时 0.011 秒)

    Process of (co)polymerization of .alpha.-olefins in the presence of stabilizers
    2.
    发明授权
    Process of (co)polymerization of .alpha.-olefins in the presence of stabilizers 失效
    在稳定剂存在下，α-烯烃（共）聚合的方法

    公开(公告)号：US5350786A

    公开(公告)日：1994-09-27

    申请号：US26097

    申请日：1993-03-04

    申请人： Silvestro Costanzi ,  Damiano Gussoni ,  Luciano Pallini

    发明人： Silvestro Costanzi ,  Damiano Gussoni ,  Luciano Pallini

    IPC分类号： C08F2/44 ,  C08F10/00 ,  C08K5/3435

    CPC分类号： C08F10/00 ,  C08F110/06

    摘要： Stabilizers for organic polymers, consisting of one or more compounds of the classis of the sterically hindered amines (HALS) are directly added to the reaction mixture during the (co)polymerization of the .alpha.-olefins or of their mixtures with other unsaturated monomers.The so-obtained polymeric compositions result perfectly stabilized and show a thermo- and photo-oxidative resistance higher than that of the same polymeric compositions to which the same stabilizers are added by a traditional route.

    摘要翻译： 在α-烯烃或其混合物与其它不饱和单体的（共）聚合过程中，直接将有机聚合物的稳定剂（由空间位阻胺类的一种或多种化合物（HALS）组成）直接加入到反应混合物中。 如此获得的聚合物组合物完全稳定，并且显示比通过传统路线添加相同稳定剂的相同聚合物组合物的热和光氧化抗性更高。

    Process for the synthesis of allylated derivatives of 2,2,6,6-tetraalkylpiperidinols
    4.
    发明授权
    Process for the synthesis of allylated derivatives of 2,2,6,6-tetraalkylpiperidinols 失效
    合成2,2,6,6-四烷基哌啶醇的烯丙基化衍生物的方法

    公开(公告)号：US5270470A

    公开(公告)日：1993-12-14

    申请号：US481725

    申请日：1990-02-16

    申请人： Silvestro Costanzi ,  Luciano Pallini ,  Damiano Gussoni

    发明人： Silvestro Costanzi ,  Luciano Pallini ,  Damiano Gussoni

    IPC分类号： C07D211/46 ,  C07D211/36

    CPC分类号： C07D211/46

    摘要： A process is disclosed for the synthesis of 4-allyloxy-2,2,6,6-tetraalkylpiperidinic derivatives by starting from the corresponding 2,2,6,6-tetraaLkyLpiperidinols and from an allyl halide, characterized in that the reaction is made to take place in the absence of water, and in the presence of a finely subdivided allyl-metal hydroxide and of small amounts of a phase-transfer catalyst. The products, which are thus obtained with yields higher than 90%, are useful a stabilizers for polymers or as intermediates for such products.

    摘要翻译： 公开了用于合成4-烯丙氧基-2,2,6,6-四烷基哌啶衍生物的方法，由相应的2,2,6,6-四氢基哌啶醇和烯丙基卤开始，其特征在于使反应生成 在不存在水的情况下进行，并且在细分的烯丙基 - 金属氢氧化物和少量的相转移催化剂的存在下进行。 因此获得的产率高于90％的产品可用作聚合物的稳定剂或作为这种产品的中间体。