Process for cationic polymerizations
    27.
    发明授权
    Process for cationic polymerizations 失效
    阳离子聚合方法

    公开(公告)号:US5219948A

    公开(公告)日:1993-06-15

    申请号:US839861

    申请日:1992-02-21

    IPC分类号: C08F297/00

    CPC分类号: C08F297/00

    摘要: Elastomeric polymers comprising polymerized alpha-olefins or conjugated alkadienes are produced by cationic polymerization in the presence of titanium tetrachloride and an electron pair donor selected from pyridine or a non-hindered alkylpyridine. The polymers have very narrow, mono-modal molecular weight distributions such a achived by anionic polymerization. Polymerization of each monomer is terminated prior to broadening of the molecular weight distribution which significantly detracts from polymer properties.

    摘要翻译: 包含聚合的α-烯烃或共轭链二烯的弹性体聚合物在四氯化钛和选自吡啶或非受阻烷基吡啶的电子对供体的存在下通过阳离子聚合制备。 聚合物具有非常窄的单模分子量分布,如阴离子聚合所得。 在扩展分子量分布之前终止每种单体的聚合,这显着降低聚合物性质。

    Preparation of exo-olefin terminated polyolefins via quenching with alkoxysilanes or ethers
    28.
    发明申请
    Preparation of exo-olefin terminated polyolefins via quenching with alkoxysilanes or ethers 有权
    通过用烷氧基硅烷或醚猝灭制备外烯烃封端的聚烯烃

    公开(公告)号:US20090318624A1

    公开(公告)日:2009-12-24

    申请号:US12145460

    申请日:2008-06-24

    IPC分类号: C08F8/00

    摘要: Provided herein are methods for preparing a polyolefin containing one or more exo-olefinic end groups on the polyolefin chain, comprising quenching an ionized polyolefin with an alkoxysilane or an ether. In some embodiments, the methods are represented by the following scheme: In some embodiments, the alkoxysilane or ether compound has the formula: wherein Y is carbon or silicon; R1 is hydrocarbyl; and R2-R4 are each, independently, hydrogen or hydrocarbyl.

    摘要翻译: 本文提供了制备在聚烯烃链上含有一个或多个外烯烃端基的聚烯烃的方法,包括用烷氧基硅烷或醚淬灭电离聚烯烃。 在一些实施方案中,所述方法由以下方案表示:在一些实施方案中,烷氧基硅烷或醚化合物具有下式:其中Y是碳或硅; R1是烃基; 和R 2 -R 4各自独立地为氢或烃基。