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    SEGMENTED MULTICOMPONENT INTERPOLYMERS OF MONOVINYLIDENE AROMATIC MONOMERS
    2.
    发明申请
    SEGMENTED MULTICOMPONENT INTERPOLYMERS OF MONOVINYLIDENE AROMATIC MONOMERS 审中-公开
    单分子芳族单体的分离多元介体

    公开(公告)号：WO1996039451A1

    公开(公告)日：1996-12-12

    申请号：PCT/US1996006280

    申请日：1996-05-03

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： THE DOW CHEMICAL COMPANY ,  SOTO, Jorge ,  MARCHAND, Gary, R. ,  STEVENS, James, C. ,  CRAWFORD, Lenore, H.

    IPC: C08F290/04

    CPC classification number: C08F290/04

    Abstract: This invention relates to segmented, multicomponent interpolymers comprising: A) at least one olefin polymer segment comprising a substantially linear ethylene homopolymer or a substantially linear or branched copolymer of ethylene and at least one comonomer selected from the group consisting of C3-20 alpha -olefins, and B) at least one monovinylidene aromatic polymer segment, said olefin polymer segment and monovinylidene aromatic polymer segment being joined by means of the copolymerization of the terminal vinyl functionality of a macromonomer comprising the monovinylidene aromatic polymer segment with ethylene or a mixture of ethylene and said at least one comonomer under Ziegler-Natta polymerization conditions.

    Abstract translation: 本发明涉及分段的多组分互聚物，其包含：A）至少一种烯烃聚合物链段，其包含基本上线性的乙烯均聚物或乙烯和至少一种共聚单体的基本上线性或支化的共聚物，所述共聚单体选自C3-20α-烯烃 和B）至少一个单亚乙烯基芳族聚合物链段，所述烯烃聚合物链段和单亚乙烯基芳族聚合物链段通过包含单亚乙烯基芳族聚合物链段的大分子单体的末端乙烯基官能团与乙烯或乙烯和 在齐格勒 - 纳塔聚合条件下表示至少一种共聚单体。

    INCORPORATION OF FREE RADICAL INHIBITORS IN POLYOLEFINS
    9.
    发明公开
    INCORPORATION OF FREE RADICAL INHIBITORS IN POLYOLEFINS 失效
    混合聚烯烃自由基抑制剂

    公开(公告)号：EP0923609A1

    公开(公告)日：1999-06-23

    申请号：EP97938649.0

    申请日：1997-08-27

    Applicant: THE DOW CHEMICAL COMPANY

    Inventor： MULLINS, Michael, J. ,  NICKIAS, Peter, N. ,  SOTO, Jorge

    IPC: C08K5 ,  C08F2 ,  C08F4 ,  C08F10 ,  C08L23

    CPC classification number: C08F10/00 ,  C08F4/61908 ,  C08F4/61927 ,  C08F110/06 ,  C08F2/44 ,  C08F4/61912

    Abstract: It has now been found that certain phenolic compounds can be used as free radical inhibitors during polymerization without deactivation of transition metal catalysts. Use of such compounds during polymerization is particularly advantageous when they are substantially free of catalyst inactivating compounds such as less substituted phenols and quinones. The invention includes a process for inhibiting deterioration in a polymer by adding a free radical inhibitor during or before polymerization with a transition metal catalyst. It is not necessary to inactivate the free radical inhibitor since it advantageously does not inhibit the transition metal catalyst activity. The process is preferably preceded by a step of purifying the free radical inhibitor to remove compounds which inhibit catalyst activity such as quinones and phenols which are not sufficiently sterically hindered to avoid inhibiting the catalyst. Additionally, the invention includes a composition comprising at least one olefin monomer, a polymer of the monomer, a transition metal catalyst and at least one free radical inhibitor having sufficient substituents to hinder the active inhibiting group such that it does not undesirably inhibit the transition metal catalyst. The invention is particularly useful when the monomer comprises propylene, styrene or a derivative thereof.

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