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    Polymeric piperazinamides and membranes for reverse osmosis made therefrom
    2.
    发明授权
    Polymeric piperazinamides and membranes for reverse osmosis made therefrom 失效
    聚合的哌嗪酰胺和用于反渗透的膜

    公开(公告)号：US4123424A

    公开(公告)日：1978-10-31

    申请号：US634760

    申请日：1975-11-24

    申请人： Lino Credali ,  Vincenzo Guidotti

    发明人： Lino Credali ,  Vincenzo Guidotti

    IPC分类号： B01D71/56 ,  C08G69/40 ,  C08G69/42 ,  C08G69/26 ,  B01D39/16

    CPC分类号： B01D71/56 ,  C08G69/40 ,  C08G69/42 ,  Y10S524/909

    摘要： Polymeric piperazinamides suitable for use in reverse osmosis membranes. These polymeric piperazineamides consist essentially of the repeating unit ##STR1## wherein x is zero or a whole number from 1 to 8, R is a substituent such as alkyl, and --A-- is a bivalent radical, namely an organic dicarbonyl radical which either is always of the formula ##STR2## wherein X is oxygen or sulfur, and R' and R" are each hydrogen, alkyl, or aryl, or else where some of said radicals --A-- are of formula (III) and the remainder of said radicals --A-- are organic dicarbonyl radicals differing from said formula (III).

    摘要翻译： 适用于反渗透膜的聚合哌嗪酰胺。 这些聚合哌嗪酰胺基本上由重复单元（I）组成，其中x为0或1至8的整数，R为取代基如烷基，-A-为二价基团，即有机二羰基 其总是具有式（III）的式（III），其中X是氧或硫，R'和R“各自是氢，烷基或芳基，或者其中一些所述基团-A-具有式 III），所述基团的其余部分-A是与所述式（III）不同的有机二羰基。

    Process for preparing two-component synthetic fibers suited for replacing cellulose fibers
    10.
    发明授权
    Process for preparing two-component synthetic fibers suited for replacing cellulose fibers 失效
    制备适合替代纤维素纤维的双组分合成纤维的方法

    公开(公告)号：US4710336A

    公开(公告)日：1987-12-01

    申请号：US798400

    申请日：1985-11-15

    申请人： Lino Credali ,  Gianfranco Corsi ,  Antonio Chiolle

    发明人： Lino Credali ,  Gianfranco Corsi ,  Antonio Chiolle

    IPC分类号： D01F8/04 ,  D01D5/11 ,  D01F8/06 ,  D21H13/10 ,  D01D1/02

    CPC分类号： D01F8/06 ,  D01D5/11 ,  D21H13/10 ,  D21H5/20 ,  Y10S264/26 ,  Y10S264/29

    摘要： Two-component fibers, having surface area of at least 1 m.sup.2 /g, suited for replacing cellulose fibers in the manufacture of paper and paper-like products comprise a core of olefinic polymer and from 2 to 50% by weight of a sheath of a hydrophilic polymer, and exhibit values of the tenacity higher than 3,000 meters and cohesion higher than 300 meters. They are prepared by extruding a stable emulsion formed by a mixture of a solution of the olefinic polymer with a solution of the hydrophilic polymer in reciprocally immiscible solvents, at a temperature exceeding the boiling temperature of the solvent of the olefinic polymer and at least equal to the dissolution temperature of such polymer in such solvent, in a medium at a lower pressure, by using a volume ratio of solvent for the olefinic polymer to solvent for the hydrophilic polymer of at least 2.5 and concentrations of hydrophilic polymer in its solution of at least 2 g/l of solvent.

    摘要翻译： 具有至少1m 2 / g的表面积的双组分纤维适用于在纸和纸状产品的制造中替代纤维素纤维包括烯烃聚合物的芯和2至50重量％的 亲水性聚合物，韧性值高于3000米，内聚力高于300米。 它们通过在超过烯烃聚合物的溶剂的沸点的温度下挤出由烯烃聚合物的溶液与亲水性聚合物的溶液在可往复混合的溶剂中的混合物形成的稳定的乳液，并且至少等于 这种聚合物在这种溶剂中，在较低压力的介质中的溶解温度，通过使用烯烃聚合物的溶剂与亲水性聚合物的溶剂的体积比至少为2.5，其溶液中的亲水性聚合物的浓度至少为 2 g / l溶剂。