Expandable styrene resin beads and suspension-polymerization process for
producing the same
    22.
    发明授权
    Expandable styrene resin beads and suspension-polymerization process for producing the same 失效
    可发性苯乙烯树脂珠及其制备的悬浮聚合方法

    公开(公告)号:US5616413A

    公开(公告)日:1997-04-01

    申请号:US421244

    申请日:1995-04-13

    摘要: Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/l, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.

    摘要翻译: 描述了可膨胀的苯乙烯树脂珠粒,其当膨胀至20g / l的堆积密度时,得到预发泡珠粒,其中沿着从珠粒表面到深度为0.2的半径的那些表面部分存在细胞数目 距离表面的mm为3至20 / mm,沿半径范围从胎圈表面到胎圈中心1mm的深度内部存在的细胞数量为每毫米10个或更大, 沿着所述表面部分存在的细胞小于沿着所述内部部分存在的细胞的数量。

    Porous copolymers having a cellular polymeric structure suitable for
preparing ion-exchange resins and adsorbents
    28.
    发明授权
    Porous copolymers having a cellular polymeric structure suitable for preparing ion-exchange resins and adsorbents 失效
    具有适于制备离子交换树脂和吸附剂的多孔聚合物结构的多孔共聚物

    公开(公告)号:US5512604A

    公开(公告)日:1996-04-30

    申请号:US937800

    申请日:1992-08-28

    申请人: Tom N. Demopolis

    发明人: Tom N. Demopolis

    摘要: Novel porous copolymers are disclosed which can be used to prepare ion-exchange resins and polymeric adsorbents. The copolymers comprise a copolymer of at least one monovinylidene monomer and a crosslinking monomer and have a unique cellular pore structure. The cellular structure comprises a macroporous void phase which is dispersed within a continuous copolymer phase. The porous void phase comprises a plurality of cellular void spaces which are at least partially enclosed by walls of the continuous copolymer phase. Also disclosed are processes which can be used to prepare the porous copolymers, as well as ion-exchange resins and polymeric adsorbents using the porous copolymers.

    摘要翻译: 公开了可用于制备离子交换树脂和聚合物吸附剂的新型多孔共聚物。 共聚物包含至少一种单亚乙烯基单体和交联单体的共聚物,并且具有独特的细孔结构。 细胞结构包括分散在连续共聚物相中的大孔空隙相。 多孔空隙相包括至少部分地被连续共聚物相的壁封闭的多个细胞空隙空间。 还公开了可用于制备多孔共聚物的方法,以及使用多孔共聚物的离子交换树脂和聚合物吸附剂。

    Catalyst for producing aromatic vinyl compound polymer and process for
producing aromatic vinyl compound polymer by using same
    29.
    发明授权
    Catalyst for producing aromatic vinyl compound polymer and process for producing aromatic vinyl compound polymer by using same 失效
    用于制备芳族乙烯基化合物聚合物的催化剂和通过使用它们生产芳族乙烯基化合物聚合物的方法

    公开(公告)号:US5510434A

    公开(公告)日:1996-04-23

    申请号:US347241

    申请日:1994-11-23

    申请人: Mizutomo Takeuchi

    发明人: Mizutomo Takeuchi

    摘要: There are disclosed a catalyst for producing an aromatic vinyl compound polymer which catalyst comprises a contact product between an (A) trivalent titanium compound and a (B) compound represented by the general formula (II) or (III)R.sup.1.sub.k M.sup.1 L.sup.2.sub.m (II)R.sup.1.sub.k M.sup.1 X.sup.2.sub.l L.sup.2.sub.m (III)a (C) an ionic compound comprising a noncoordinate anion and a cation, an aluminoxane or an organoboron compound; and optionally a (D) Lewis acid, and a process for producing an aromatic vinyl compound polymer having a high degree of syndiotactic configuration which process comprises polymerizing (a) an aromatic vinyl compound or (b) an aromatic vinyl compound together with an olefin or a diolefin in the presence of the above catalyst.By virtue of using the trivalent titanium compound, it is made possible to readily prepare the above catalyst in high yield, to efficiently produce the above (co)polymer in high catalytic activity by using the catalyst and further to enhance the syndiotacticity of the objective (co)polymer, while minimizing the by-production of unfavorable atactic (co)polymer.

    摘要翻译: 公开了一种用于制备芳族乙烯基化合物聚合物的催化剂,该催化剂包含(A)三价钛化合物和由通式(II)或(III)表示的(B)化合物之间的接触产物R1kM1L2m(II)R1kM1X2lL2m(II) III)a(C)包含非配位阴离子和阳离子,铝氧烷或有机硼化合物的离子化合物; 和(D)路易斯酸,以及具有高间隔构型的芳族乙烯基化合物聚合物的方法,该方法包括使(a)芳族乙烯基化合物或(b)芳族乙烯基化合物与烯烃一起聚合 在上述催化剂存在下的二烯烃。 通过使用三价钛化合物,可以高产率容易地制备上述催化剂,通过使用催化剂有效地制备具有高催化活性的上述(共)聚合物,并进一步提高了目标的间同立构规整度( co)聚合物,同时使不利的无规(共)聚合物的副产物最小化。

    Method of making fluoropolymers
    30.
    发明授权
    Method of making fluoropolymers 失效
    制备含氟聚合物的方法

    公开(公告)号:US5496901A

    公开(公告)日:1996-03-05

    申请号:US302642

    申请日:1994-09-27

    摘要: A process for making a fluoropolymer is disclosed. The process comprises solubilizing a fluoromonomer in solvent comprising a carbon dioxide fluid, and then polymerizing the fluoromonomer to produce the fluoropolymer. A preferred solvent for carrying out the process is supercritical carbon dioxide; preferred fluoromonomers for carrying out the process are fluoroacrylate monomers such as 1,1-dihydroperfluorooctyl acrylate. The polymerization step is preferably carried out in the presence of an initiator such as azobisisobutyronitrile.

    摘要翻译: PCT No.PCT / US93 / 01626 Sec。 371日期:1994年9月27日 102(e)日期1994年9月27日PCT提交1993年2月26日PCT公布。 公开号WO93 / 20116 PCT 日期:10月14日,日本专利公开了一种制造含氟聚合物的方法。 该方法包括将含氟单体溶解在包含二氧化碳流体的溶剂中,然后使含氟单体聚合以制备含氟聚合物。 用于进行该方法的优选溶剂是超临界二氧化碳; 用于进行该方法的优选的氟单体是氟代丙烯酸酯单体,例如丙烯酸1,1-二氢双氟辛酯。 聚合步骤优选在引发剂如偶氮二异丁腈存在下进行。