New polymerization process and polymers produced thereby
    1.
    发明公开
    New polymerization process and polymers produced thereby 失效
    新的聚合方法和生产的聚合物

    公开(公告)号:EP0135280A3

    公开(公告)日:1986-08-13

    申请号:EP84304756

    申请日:1984-07-11

    CPC classification number: C08C19/22 C08F4/00 C08F291/00

    Abstract: The present invention relates generally to improved processes for free radical polymerization, particularly to improved processes in which it is possible to control the growth steps of the polymerization to produce relatively short chain length homopolymers and copolymers, including block and graft copolymers, and further relates to new initiators which find particular application in the improved processes. Such initiators have the general structure of Formula I
    wherein
    X represents a group having at least one carbon atom and is such that the free radical X is capable of polymerizing the unsaturated monomer by free radical polymerization, and the radical functionality resides on the or one of the carbon atoms. R', R 2 , R 5 and R 6 represent the same or different straight chain or branched substituted or unsubstituted alkyl groups of a chain length sufficient to provide steric hindrance and weakening of the 0-X bond, and R 3 and R 4 represent the same or different straight chain or branched substituted alkyl groups or R 3 CNCR 4 may be part of a cyclic structure which may have fused with it another saturated or aromatic ring, the cyclic structure or aromatic ring being optionally substituted.

    Abstract translation: 本发明一般涉及自由基聚合的改进方法,特别涉及改进方法,其中可以控制聚合的生长步骤以产生相对较短的链长均聚物和共聚物,包括嵌段和接枝共聚物,还涉及 在改进过程中发现特定应用的新引发者。 这种引发剂具有式1的通式结构,其中X表示具有至少一个碳原子的基团,并且使得自由基X能够通过自由基聚合使不饱和单体聚合。 并且基团官能团位于碳原子上或其中一个碳原子上。 R 1,R 2,R 5和R 6表示相同或不同的直链或支链取代或未取代的烷基,其链长足以提供OX键的空间位阻和弱化,以及 R 3和R 4表示相同或不同的直链或支链取代的烷基或R 3 CNCR 4可以是可以与其另一个饱和或芳环稠合的环状结构的一部分, 环状结构或芳环任选被取代。

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