Black and white electrophoretic particles and method of manufacture
    2.
    发明授权
    Black and white electrophoretic particles and method of manufacture 失效
    黑白电泳颗粒及其制造方法

    公开(公告)号:US6117368A

    公开(公告)日:2000-09-12

    申请号:US361891

    申请日:1994-12-21

    申请人: Wei-Hsin Hou

    发明人: Wei-Hsin Hou

    摘要: A process for forming dielectric particles includes admixing a first monomer and a crosslinker in a liquid dispersion medium to form a first mixture. A second mixture of an initiator and a stabilizer is prepared and added to the first mixture to form a third mixture in which the first monomer polymerizes to form polymer particles. A second monomer is introduced to the third mixture, the second monomer at least partially polymerizing and grafting upon the previously formed polymer particles. A functional monomer effecting the outer surface charge characteristics of the final particles may be introduced to the third mixture when the second monomer is introduced. The particles may be employed in an electrophoretic fluid for use in an electrophoretic display by dispersing the dielectric particles prepared by the two stage polymerization process in a dielectric fluid.

    摘要翻译: 用于形成介电颗粒的方法包括在液体分散介质中混合第一单体和交联剂以形成第一混合物。 制备引发剂和稳定剂的第二混合物并加入到第一混合物中以形成其中第一单体聚合以形成聚合物颗粒的第三混合物。 将第二单体引入第三混合物中,第二单体至少部分地聚合和接枝在先前形成的聚合物颗粒上。 当引入第二单体时,可以将影响最终颗粒的外表面电荷特性的官能单体引入第三混合物。 通过将通过两步聚合方法制备的介电颗粒分散在电介质流体中,可以将该颗粒用于电泳液中用于电泳显示。

    Process for the solid phase polymerization of acrylonitrile from the
gaseous phase
    4.
    发明授权
    Process for the solid phase polymerization of acrylonitrile from the gaseous phase 失效
    来自气相的丙烯腈的固相聚合方法

    公开(公告)号:US5135997A

    公开(公告)日:1992-08-04

    申请号:US582247

    申请日:1990-09-14

    CPC分类号: C08F265/08

    摘要: This invention relates to a process for the radical homo-or copolymerization of acrylonitrile with one or more copolymerizable monomers under reaction conditions such that the monomers are present predominantly in a gaseous form of an adsorbed form and polymerization of the monomers, which are presumably adsorbed, takes place in the solid phase (solvent-free polymerization) and results in pulverulent PAN-(co)polymers. The process is preferably carried out in the presence of small quantities of a mediator substance such as dimethylformamide which does not alter the pulverulent consistency of the PAN-polymers but leads considerably more rapidly and with much improved yields to freshly formed polyacrylonitrile polymers.

    摘要翻译: 本发明涉及丙烯腈与一种或多种可共聚单体在反应条件下自由基均相或共聚的方法,使得单体主要以气态吸附形式存在,并且可能吸附的单体聚合, 在固相(无溶剂聚合)中发生并产生粉末状的PAN-(共)聚合物。 该方法优选在少量的介质物质例如二甲基甲酰胺的存在下进行,其不改变PAN-聚合物的粉末稠度,但是引起相当快速且对新形成的聚丙烯腈聚合物的产率大大提高。

    Treating dispersions of acrylonitrile polymers
    6.
    发明授权
    Treating dispersions of acrylonitrile polymers 失效
    处理丙烯腈聚合物的分散体

    公开(公告)号:US4272425A

    公开(公告)日:1981-06-09

    申请号:US88439

    申请日:1979-10-26

    CPC分类号: C08F6/00 C08F265/08 C08F6/006

    摘要: Residual acrylonitrile dissolved in acrylonitrile copolymers and/or water in which acrylonitrile polymers are polymerized or processed such as a latex thereof or from acrylonitrile processes can be substantially reduced by adding to polymer-water mixtures for example, after at least 90% of the monomers have been polymerized, additional catalyst and an amount of comonomer in excess of the amount of free acrylonitrile present.

    摘要翻译: 丙烯腈共聚物和/或其中聚合或加工丙烯腈聚合物或其丙烯腈或丙烯腈工艺的丙烯腈共聚物和/或水的残余丙烯腈可以通过添加到聚合物 - 水混合物中,例如在至少90%的单体具有 已经聚合,另外的催化剂和超过游离丙烯腈存在量的共聚单体的量。

    Manufacture of impact-resistant olefinic-nitrile copolymers
    7.
    发明授权
    Manufacture of impact-resistant olefinic-nitrile copolymers 失效
    耐冲击烯烃 - 腈共聚物的制造

    公开(公告)号:US3956246A

    公开(公告)日:1976-05-11

    申请号:US250125

    申请日:1972-05-04

    CPC分类号: C08F265/08

    摘要: Impact-resistant polymers, which have low permeability to gases and vapors, are prepared by polymerizing methacrylonitrile with styrene to at least about 70% conversion and then introducing into the polymerization reaction medium a conjugated diene monomer, such as butadiene-1,3 and optionally styrene or methacrylonitrile, and completing the polymerization reaction.

    摘要翻译: 通过将甲基丙烯腈与苯乙烯聚合至少约70%的转化率,然后将共轭二烯单体如丁二烯-1,3和任选地引入到聚合反应介质中来制备对气体和蒸气具有低渗透性的耐冲击聚合物 苯乙烯或甲基丙烯腈,并完成聚合反应。