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    Nonrandom copolymers of ethylene and an alpha, beta-unsaturated carboxylic acid, a process for their preparation and ionomers prepared from those nonrandom copolymers
    1.
    发明公开
    Nonrandom copolymers of ethylene and an alpha, beta-unsaturated carboxylic acid, a process for their preparation and ionomers prepared from those nonrandom copolymers 无效
    离聚物有序乙烯和α，β-不饱和羧酸，它们的制备方法的共聚物及其与这些有序共聚物制备。

    公开(公告)号：EP0017229A1

    公开(公告)日：1980-10-15

    申请号：EP80101778.1

    申请日：1980-04-03

    申请人： E.I. DU PONT DE NEMOURS AND COMPANY

    发明人： Pieski, Edwin Thomas ,  Sashihara, Thomas Fujio

    IPC分类号： C08F210/02

    CPC分类号： C08F210/02 ,  Y10S526/937 ,  Y10S526/94 ,  C08F220/04

    摘要： Compositionally uniform but nonrandom copolymers of ethylene and a,p-ethylenically unsaturated carboxylic acids having from 3 to 8 carbon atoms are provided having an acid content of from about 6 to about 35 weight percent, a melt index of from about 0.1 to about 800, and a ratio of weight percent adjacent acid to weight percent total acid in the copolymer of from about 0.44 to about 1.0. These copolymers have improved physical properties such as hardness, stiffness, heat resistance and creep resistance. Further provided, is a process for preparing these copolymers in a constant environment stirred autoclave in a continuous manner wherein the reaction zone is maintained in a steady state at a pressure of from 0 to about 500 psi above, and at a temperature of from 0 to about 15°C above that needed to maintain a single phase reaction mixture at a given concentration of copolymer and at the given acid comonomer content of the copolymer.