Process for the preparation of polyphenylene ethers with activated
copper-amine catalysts
    21.
    发明授权
    Process for the preparation of polyphenylene ethers with activated copper-amine catalysts 失效
    用活性铜胺催化剂制备聚苯醚的方法

    公开(公告)号:US3988297A

    公开(公告)日:1976-10-26

    申请号:US485741

    申请日:1974-07-03

    CPC classification number: C08G65/44

    Abstract: There is disclosed herein an improved process for the preparation of high molecular weight polyphenylene ethers by oxidatively coupling a di-ortho substituted phenolic precursor in a reaction vessel containing oxygen and a complex catalyst formed from a copper salt and either a primary, secondary or tertiary amine wherein in the presence of an aqueous phase a quaternary ammonium salt is employed to promote the rate of reaction.

    Abstract translation: 本文公开了通过在含有氧的反应容器和由铜盐和伯,仲或叔胺形成的络合催化剂中氧化偶合二邻位取代的酚前体而制备高分子量聚苯醚的改进方法 其中在水相存在下,使用季铵盐来提高反应速率。

    Polyphenylene ether compositions
    25.
    发明授权
    Polyphenylene ether compositions 失效
    聚苯醚组合物

    公开(公告)号:US4513120A

    公开(公告)日:1985-04-23

    申请号:US448262

    申请日:1982-12-09

    CPC classification number: C08L51/04 C08L71/123

    Abstract: There are provided thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin having a discontinuous phase of polystyrene particles englobed in diene rubber membranes, the particles being between about 0.1 and 0.7 microns in diameter. Such compositions provide molded articles with substantial and unexpected improvements in impact resistance and ability to transmit light in comparison with known compositions of such rubber modified polystyrenes alone or those of other polystyrenes combined with polyphenylene ethers.

    Abstract translation: 提供了包含聚苯醚和橡胶改性聚苯乙烯树脂的热塑性组合物,其具有嵌在二烯橡胶膜中的聚苯乙烯颗粒的不连续相,该颗粒直径在约0.1至0.7微米之间。 与单独的这种橡胶改性聚苯乙烯的已知组合物或与聚苯醚结合的其它聚苯乙烯的已知组合物相比,这样的组合物提供了具有显着和意想不到的耐冲击性和透光能力的模塑制品。

    Method for the controlled polymerization of polyphenylene oxide polymers
    26.
    发明授权
    Method for the controlled polymerization of polyphenylene oxide polymers 失效
    聚苯醚聚合物受控聚合的方法

    公开(公告)号:US4196278A

    公开(公告)日:1980-04-01

    申请号:US865392

    申请日:1977-12-29

    CPC classification number: C08G65/44

    Abstract: A novel process is described for the control of molecular weight in the preparation of polyphenylene oxide polymers. The process is based on the slow addition of additional amounts of a monomeric phenol to a polyphenylene oxide polymerization reaction mixture which comprises a main charge of a monomeric phenol, a polyphenylene oxide polymerization catalyst and a solvent, while continuing polymerization.

    Abstract translation: 描述了一种用于控制聚苯醚聚合物制备中分子量的新方法。 该方法是基于在连续聚合的同时将包含单体苯酚,聚苯醚聚合催化剂和溶剂的主要电荷的附加量的单体苯的缓慢加入到聚苯醚聚合反应混合物中。

    Method for preparing polyphenylene ethers
    28.
    发明授权
    Method for preparing polyphenylene ethers 失效
    聚苯醚的制备方法

    公开(公告)号:US4097458A

    公开(公告)日:1978-06-27

    申请号:US427996

    申请日:1973-12-26

    CPC classification number: C08G65/46

    Abstract: An improved process is disclosed for preparing polyphenylene ethers in which a complexing agent selected from the group consisting of biguanide, di-o-tolylbiguanide, dicyanodiamide, and L-Arginine is employed to terminate the oxidative coupling reaction and facilitate the recovery of the polymer.

    Abstract translation: 公开了一种制备聚苯醚的改进方法,其中使用选自双胍,二邻甲苯基双胍,二氰基二酰胺和L-精氨酸的络合剂来终止氧化偶联反应并促进聚合物的回收。

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