Method of halogenating butyl rubber without acid neutralization agents
    2.
    发明公开
    Method of halogenating butyl rubber without acid neutralization agents 审中-公开
    Verfahren zum Halogenieren von Butylkautschuk ohneSäureneutralisierungsmittel

    公开(公告)号:EP1820808A1

    公开(公告)日:2007-08-22

    申请号:EP07003086.1

    申请日:2007-02-14

    申请人: Lanxess Inc.

    IPC分类号: C08F8/20

    CPC分类号: C08F8/20 C08F210/12

    摘要: A method to halogenate butyl rubber in the absence of water and, more particularly, without the need for addition of neutralization agents. The butyl rubber contains at least 4.1 mol% of a multi-olefin and the multi-olefin serves as a sink for the hydrohalic Brönsted acids generated when a halogenation agent is added. This obviates the need for aqueous phase acid neutralization. The novel halogenated butyl rubber produced using the method advantageously possesses a high degree of desirable exo-allylic bromides with relatively low levels of the less desirable endo-allylic bromides.

    摘要翻译: 在不存在水的情况下卤化丁基橡胶的方法,更具体地说,不需要加入中和剂。 丁基橡胶含有至少4.1摩尔%的多烯烃,并且多烯烃用作当加入卤化剂时产生的氢卤素布朗斯台德酸的水槽。 这消除了对水相酸中和的需要。 使用该方法制备的新型卤代丁基橡胶有利地具有高度期望的具有相对低水平的不期望的内部 - 外部溴化物的所需的外部含量的溴化物。