Polyhydric phenol chain extenders for certain bismaleimide resin
    1.
    发明授权
    Polyhydric phenol chain extenders for certain bismaleimide resin 失效
    用于某些双马来酰亚胺树脂的多元酚链增长剂

    公开(公告)号:US5102972A

    公开(公告)日:1992-04-07

    申请号:US557232

    申请日:1990-07-25

    IPC分类号: C08G73/12

    摘要: A class of di-ortho-substituted bismaleimides undergo uncatalyzed Michael addition with polyhydric phenols to afford chain-extended bismaleimides having a significantly wider processing window than the non-extended parent. The fully cured resins show improved fracture toughness, generally have comparable or superior dielectric constant and dielectric loss, and show no degradation in other properties such as resistance to moisture, to methylene chloride, and coefficient of thermal expansion.

    摘要翻译: 一类二邻位取代的双马来酰亚胺用多元酚进行未催化的迈克尔加成以提供具有比非延伸的亲本显着更宽的加工窗口的链延伸的双马来酰亚胺。 完全固化的树脂显示出改善的断裂韧性,通常具有相当或优异的介电常数和介电损耗,并且在其它性能如耐水性,二氯甲烷和热膨胀系数方面没有降低。

    Process for the preparation of chlorine-resistant semipermeable membranes
    2.
    发明授权
    Process for the preparation of chlorine-resistant semipermeable membranes 失效
    制备耐氯半透膜的方法

    公开(公告)号:US4885091A

    公开(公告)日:1989-12-05

    申请号:US202850

    申请日:1988-06-01

    摘要: Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composited on a porous support backing material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring such as 5-chlor-m-phenylenediamine. The coated support material is then contacted with an organic solvent solution of aromatic polycarboxylic acid chloride such as trimesoyl chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant semipermeable membrane is then cured at curing conditions to form the desired composite. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane being resistant to attack by chlorine which is present in the water.

    摘要翻译: 包含复合在多孔载体背衬材料上的界面聚合反应产物的耐氯半透膜可以通过使诸如聚砜的多孔载体材料与芳族环上含有氯取代基的芳族多胺的水溶液接触来制备,例如5 - 氯 - 间苯二胺。 然后将涂覆的载体材料与芳族多元羧酸氯化物(例如均苯三酰氯)的有机溶剂溶液接触足以在载体材料的表面上形成界面聚合反应产物的时间。 然后将所得的半透膜在固化条件下固化以形成所需的复合材料。 所得到的膜复合物可用于分离过程,例如咸水或海水的脱盐,该膜可耐受水中存在的氯的侵蚀。

    Semipermeable membrane compositions
    4.
    发明授权
    Semipermeable membrane compositions 失效
    半透膜组合物

    公开(公告)号:US4919808A

    公开(公告)日:1990-04-24

    申请号:US789682

    申请日:1985-10-21

    IPC分类号: B01D69/12 B01J13/16

    CPC分类号: B01D69/125 B01J13/16

    摘要: Semipermeable membranes which may be used in a variety of separation processes such as desalination, sugar separation, etc. are prepared by contacting a porous support backing material such as polysulfone with an aqueous solution of a hydrazine compound. The coated support material is then contacted with an organic solution of an aromatic polycarboxylic acid chloride whereby an interfacial polymerized condensation reaction product is formed on the surface of the support. The thus formed composite is then cured at an elevated temperature and recovered.

    摘要翻译: 通过使诸如聚砜的多孔载体背衬材料与肼化合物的水溶液接触,可制备可用于各种分离方法如脱盐,糖分离等的半透膜。 然后将涂覆的载体材料与芳族多羧酸氯化物的有机溶液接触,由此在载体的表面上形成界面聚合的缩合反应产物。 然后将如此形成的复合材料在升高的温度下固化并回收。

    Composite membranes based on interpenetrating polymer networks
    5.
    发明授权
    Composite membranes based on interpenetrating polymer networks 失效
    基于互穿聚合物网络的复合膜

    公开(公告)号:US4747953A

    公开(公告)日:1988-05-31

    申请号:US831672

    申请日:1986-02-21

    摘要: Semipermeable composite membranes which comprise an interpenetrating polymer network of the isocyanate-capped polymer which is the reaction product of a polyether and an isocyanate with a copolymer containing at least two saturated or unsaturated heterocyclic nitrogen-containing compounds composited on a porous backing support material may be used in various separation systems. These separation systems may include reverse osmosis, ultrafiltration, gas separation, dialysis, etc., an especially useful system being the separation of sugars.

    摘要翻译: 包含异氰酸酯封端的聚合物的互穿聚合物网络的半透性复合膜,其是聚醚和异氰酸酯与含有至少两种在多孔背衬载体材料上复合的饱和或不饱和杂环含氮化合物的共聚物的反应产物,可以是 用于各种分离系统。 这些分离系统可以包括反渗透,超滤,气体分离,透析等,是分离糖的特别有用的系统。

    Chlorine-resistant semipermeable membranes
    9.
    发明授权
    Chlorine-resistant semipermeable membranes 失效
    耐氯半透膜

    公开(公告)号:US4772394A

    公开(公告)日:1988-09-20

    申请号:US898074

    申请日:1986-08-20

    摘要: Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composited on a porous support backing material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring. The coated support material is then contacted with an organic solvent solution of aromatic polycarboxylic acid chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane being resistant to attack by chlorine which is present in the water.

    摘要翻译: 包含复合在多孔载体背衬材料上的界面聚合反应产物的耐氯半透膜可以通过使诸如聚砜的多孔载体材料与芳族环上含有氯取代基的芳族多胺的水溶液接触来制备。 然后将涂覆的载体材料与芳族多羧酸氯化物的有机溶剂溶液接触足以在载体材料的表面上形成界面聚合反应产物的时间。 所得到的膜复合物可用于分离过程,例如咸水或海水的脱盐,该膜可耐受水中存在的氯的侵蚀。

    Water insoluble proton conducting polymers
    10.
    发明授权
    Water insoluble proton conducting polymers 失效
    水不溶性质子导电聚合物

    公开(公告)号:US4708981A

    公开(公告)日:1987-11-24

    申请号:US807727

    申请日:1985-12-11

    摘要: Water-insoluble proton-conducting polymers which may be formed into membranes which are used in gas separation or gas sensing processes comprise an interpenetrating polymer network. This IPN is formed from the interaction between a host polymer and a guest polymer which is subsequently cross-linked or cured. The host polymer blend is formed from a phosphoric acid or sulfuric acid and a polymer or copolymer of a compound which possesses repeat units such as, for example, hydroxy ethylene, vinyl sulfonic acid, ethylene imine, etc, while the guest polymer is formed from a monofunctional monomer such as methacrylic acid and a difunctional cross-linking agent such as methylenebisacrylamide.

    摘要翻译: 可以形成为用于气体分离或气体检测方法的膜的水不溶性质子导电聚合物包括互穿聚合物网络。 该IPN由主体聚合物和随后交联或固化的客体聚合物之间的相互作用形成。 主体聚合物共混物由磷酸或硫酸和具有重复单元的化合物的聚合物或共聚物形成,所述化合物具有重复单元,例如羟基乙烯,乙烯基磺酸,乙烯亚胺等,而客体聚合物由 单官能单体如甲基丙烯酸和双功能交联剂如亚甲基双丙烯酰胺。