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    Rate enhancement of nitroxyl radical-mediated polymerization
    3.
    发明授权
    Rate enhancement of nitroxyl radical-mediated polymerization 有权
    硝酰自由基介导聚合的速率增强

    公开(公告)号：US06288186B1

    公开(公告)日：2001-09-11

    申请号：US09200470

    申请日：1998-11-27

    申请人： Krzysztof Matyjaszewski ,  Dorota Greszta

    发明人： Krzysztof Matyjaszewski ,  Dorota Greszta

    IPC分类号： C08F200

    CPC分类号： C07D295/24 ,  C08F4/00

    摘要： An improved process for free radical polymerization is produced making it possible to control the growth steps of a polymerization to produce homopolymers and copolymers, including block and graft copolymers. The process uses a long half-life radical initiators and compounds which have the structure of formula I wherein X is 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, R1, R2, R5 and R6 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 O—X bond, and R3 and R4 represent the same or different, straight chain or branched, substituted alkyl groups or R3CNCR4 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.

    摘要翻译： 产生自由基聚合的改进方法，使得可以控制聚合的生长步骤以产生均聚物和共聚物，包括嵌段和接枝共聚物。 该方法使用长半衰期的自由基引发剂和具有式I结构的化合物，其中X是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之一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 并且R 3和R 4表示相同或不同的直链或支链取代的烷基，或者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。

    Method for preparation of alkoxyamines from nitroxyl radicals
    6.
    发明授权
    Method for preparation of alkoxyamines from nitroxyl radicals 失效
    从硝酰自由基制备烷氧基胺的方法

    公开(公告)号：US5910549A

    公开(公告)日：1999-06-08

    申请号：US701437

    申请日：1996-08-22

    申请人： Krzysztof Matyjaszewski ,  Dorota Greszta

    发明人： Krzysztof Matyjaszewski ,  Dorota Greszta

    IPC分类号： C07D295/24 ,  C08F2/00 ,  C08F2/38 ,  C08F4/00

    CPC分类号： C07D295/24 ,  C08F4/00

    摘要： An improved process for free radical polymerization is produced making it possible to control the growth steps of a polymerization to produce homopolymers and copolymers, including block and graft copolymers. The process uses a long half-life radical initiators and compounds which have the structure of formula I ##STR1## wherein X is 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.sup.1, R.sup.2, R.sup.5 and R.sup.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 O--X bond, and R.sup.3 and R.sup.4 represent the same or different, straight chain or branched, substituted alkyl groups or R.sup.3 CNCR.sup.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.

    摘要翻译： 产生自由基聚合的改进方法，使得可以控制聚合的生长步骤以产生均聚物和共聚物，包括嵌段和接枝共聚物。 该方法使用长半衰期的自由基引发剂和具有式I结构的化合物，其中X是具有至少一个碳原子的基团，并且使自由基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之一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 并且R 3和R 4表示相同或不同的直链或支链取代的烷基，或者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，所述环状结构或芳环任选被取代。