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59 条记录 (耗时 0.019 秒)

    Indene-chlorobutyl rubber copolymers
    12.
    发明授权
    Indene-chlorobutyl rubber copolymers 失效
    茚 - 氯丁基橡胶共聚物

    公开(公告)号：US4100226A

    公开(公告)日：1978-07-11

    申请号：US753919

    申请日：1976-12-23

    申请人： George S. Li

    发明人： George S. Li

    IPC分类号： C08F289/00 ,  C08F255/10 ,  C08F279/02

    CPC分类号： C08F255/10 ,  Y10S525/905

    摘要： Graft polymers of indene onto chlorobutyl rubber which have good impact resistance and high heat-distortion temperatures and blends of these graft polymers with commercially available thermoplastic resins are described.

    摘要翻译： 描述了具有良好抗冲击性和高热变形温度的茚对氯丁基橡胶的接枝聚合物，以及这些接枝聚合物与市售热塑性树脂的共混物。

    Process for the modification of aromatic polymers via phase transfer catalysis to produce polyarylene polymers and the use thereof
    18.
    发明授权
    Process for the modification of aromatic polymers via phase transfer catalysis to produce polyarylene polymers and the use thereof 失效
    通过相转移催化改性芳族聚合物以制备聚亚芳基聚合物的方法及其用途

    公开(公告)号：US4699634A

    公开(公告)日：1987-10-13

    申请号：US753020

    申请日：1985-07-08

    申请人： Elena S. Percec ,  George S. Li

    发明人： Elena S. Percec ,  George S. Li

    IPC分类号： C08G64/06 ,  C08G75/02 ,  C08G63/76 ,  B01D53/22 ,  C08G65/48

    CPC分类号： C08G75/029 ,  C08G64/06 ,  Y10S525/933

    摘要： A process for the modification of alkyl halogenated polyarylenes with a derivative compound comprising the steps of forming a mixture of the derivative compound with a phase transfer catalyst, wherein the derivative compound has the formulaH--Z or M--Tand Z is derived from a compound selected from the group consisting of water or alcohols, thiols, amines, iminos and imides containing at least one O, N or S atom bonded to the H, M is Na or K and T is derived from a compound selected from the group consisting of cyanides, iminos, imides, carboxyls and hydroxyl; combining the mixture with the alkyl halogenated polyarylene in an organic solvent to form a second mixture; agitating the second mixture until the desired degree of substitution has taken place and thereafter separating the modified polyarylene which contains a Z or a T group.

    摘要翻译： 一种用衍生化合物改性烷基卤化聚亚芳基的方法，包括以下步骤：形成衍生化合物与相转移催化剂的混合物，其中衍生化合物具有式HZ或MT，Z衍生自选自 含有至少一个与H键合的O，N或S原子的水或醇，硫醇，胺，亚胺和酰亚胺的组分是Na或K，T衍生自选自氰化物，亚胺的化合物 ，酰亚胺，羧基和羟基; 将混合物与烷基卤代聚亚芳基在有机溶剂中混合以形成第二混合物; 搅拌第二混合物直到发生所需的取代度，然后分离出含有Z或T基团的改性聚亚芳基。

    Semipermeable membranes prepared from polymers containing adjacent, pendent carboxy groups
    19.
    发明授权
    Semipermeable membranes prepared from polymers containing adjacent, pendent carboxy groups 失效
    半透膜由含有相邻的侧链羧基的聚合物制备

    公开(公告)号：US4663050A

    公开(公告)日：1987-05-05

    申请号：US500116

    申请日：1983-06-01

    申请人： George S. Li ,  William M. Giffen, Jr.

    发明人： George S. Li ,  William M. Giffen, Jr.

    IPC分类号： B01D71/40 ,  B01D13/00

    CPC分类号： B01D71/40

    摘要： Semipermeable membranes useful for separating mixtures of ethanol and water into enriched fractions of each are prepared by cross-linking 50-90 weight percent of at least one polymer containing pendent, adjacent carboxy groups with 10-50 weight percent of at least one diamine. Membranes prepared from copolymers of maleic anhydride and styrene cross-linked with a polyoxyalkylene diamine are exemplary. These membranes are also useful in gas separation processes, such as separating oxygen from nitrogen.

    摘要翻译： 通过将50-90重量％的至少一种含有侧链的相邻羧基的聚合物与10-50重量％的至少一种二胺交联而制备用于将乙醇和水的混合物分离成富集部分的半透膜。 由马来酸酐和与聚氧化烯二胺交联的苯乙烯的共聚物制备的膜是示例性的。 这些膜也可用于气体分离过程，例如从氮气中分离氧气。