Composite membranes and processes for their production
    11.
    发明授权
    Composite membranes and processes for their production 失效
    复合膜及其生产工艺

    公开(公告)号:US5658669A

    公开(公告)日:1997-08-19

    申请号:US435496

    申请日:1995-05-05

    Abstract: A composite membrane comprises a porous carrier membrane (A) and a fluorine-containing permselective layer (C) which is a copolymer and has a thickness of 10 to 500 nm. The copolymer of layer (C) comprisesa) 10 to 80 mol % of monomer units of a vinyl ester of the formula (I) ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are hydrogen, alkyl radicals, cycloalkyl radicals or aryl radicals, and these radicals together have at least 5 and not more than 30 carbon atoms,b1) 5 to 50 mol % of monomer units of a vinyl alcohol of the formula (II) ##STR2## in which R.sup.4 is the hydroxyl group and up to 10% of the groups R.sup.4 can be replaced by radicals of the formula OCOR.sup.5, in which R.sup.5 is methyl, ethyl or propyl, orb2) 5 to 50 mol % of monomer units of the formula (III) ##STR3## in which R.sup.6 is a straight-chain or branched alkylene radical having 1 to 6 carbon atoms, andc) at least 10 mol % of a fluoroolefin, the chains containing hydroxyl groups being crosslinked with one another, in particular by multifunctional isocyanates. The membrane can be employed, inter alia, for gas separation and pervaporation.

    Abstract translation: 复合膜包括多孔载体膜(A)和作为共聚物的厚度为10〜500nm的含氟选择渗透层(C)。 层(C)的共聚物包含a)10至80mol%的式(I)的乙烯基酯单体单元(1),其中R 1,R 2和R 3是氢,烷基,环烷基或 芳基,这些基团一起具有至少5个且不多于30个碳原子,b1)5-50mol%的式(II)的乙烯醇的单体单元,其中R 4是 羟基和至多10%的基团R 4可以被式OCOR 5的基团取代,其中R 5是甲基,乙基或丙基,或者b2)5至50摩尔%的式(III)单体单元

    Process and device for producing ultrathin layers and layer element
    13.
    发明授权
    Process and device for producing ultrathin layers and layer element 失效
    用于生产超薄层和层元件的方法和装置

    公开(公告)号:US5429842A

    公开(公告)日:1995-07-04

    申请号:US108119

    申请日:1993-08-17

    CPC classification number: B82Y30/00 B05D1/206 B82Y40/00

    Abstract: In order to continuously produce an ultrathin, ordered layer of amphiphilic molecules on the surface of a polar liquid a directed flow of the polar liquid is produced in a duct which contains the amphiphilic molecules in dissolved or undissolved form on the surface in spread form. In the duct, a duct section having a relatively high flow rate on the surface and comprising a ramp which is arranged at the bottom of the duct and washed over by the polar liquid is provided. This is followed by a duct section having a relatively low flow rate on the surface, in which the flow is dammed up at an obstacle at a liquid level constant with time, so that an ultrathin, ordered layer of amphiphilic molecules is continuously formed in these duct sections at the polar liquid/air interface by compression of the flow. The washed over ramp is movable.

    Abstract translation: 为了在极性液体的表面上连续生产超薄有序的两亲分子层,极性液体的定向流在包含以扩散形式的表面上溶解或未溶解的形式的两亲分子的管道中产生。 在管道中,具有在表面上具有相对较高流速的管道部分,并且包括布置在管道底部并被极性液体洗涤的斜面。 其后是在表面上具有相对较低流速的管道部分,其中流动在障碍物处以随时间恒定的液面被阻塞,使得在这些中连续形成两极分子的超薄有序层 通过压缩流体在极性液体/空气界面处的管道部分。 洗过的坡道是可移动的。

    Amphiphilic monomers with mixed-chain structure and polymers and film
composed of at least one monomolecular layer thereof
    14.
    发明授权
    Amphiphilic monomers with mixed-chain structure and polymers and film composed of at least one monomolecular layer thereof 失效
    具有混合链结构的聚合单体和聚合物以及至少一个单分子层组成的薄膜

    公开(公告)号:US5120809A

    公开(公告)日:1992-06-09

    申请号:US453669

    申请日:1989-12-20

    Abstract: Amphiphilic monomers with mixed-chain structures of the formula ##STR1## in which Y denotes --O-- or --NH--X denotes a group of the formula --(CH.sub.2).sub.n -- or --(CH.sub.2 --O--CH.sub.2).sub.n --l denotes an integer from 0 to 10,n denotes an integer from 1 to 10,R.sup.1 denotes hydrogen, methyl, chlorine, cyano, fluorine or bromine,R.sup.2 denotes C.sub.1 -C.sub.24 -alkyl or C.sub.1 -C.sub.24 -fluoroalkyl andR.sup.3 denotes C.sub.8 -C.sub.24 -alkyl or C.sub.8 -C.sub.24 -fluoralkyl, with the proviso that the groups R.sup.2 and R.sup.3 contain a different number of carbon atoms. The monomers are polymerized on their own or together with other comonomers. The polymers obtained are suitable for the preparation of ultra-thin layers on a suitable layer support.

    Abstract translation: 其中Y表示-O-或-NH- X的式“IMAGE”的具有混合链结构的两亲单体表示式 - (CH 2)n - 或 - (CH 2 -O-CH 2)n - 表示 0至10的整数,n表示1至10的整数,R1表示氢,甲基,氯,氰基,氟或溴,R2表示C1-C24 - 烷基或C1-C24-氟烷基,R3表示C8-C24- 烷基或C 8 -C 24 - 氟烷基,条件是基团R 2和R 3含有不同数目的碳原子。 单体自身或与其它共聚单体一起聚合。 所获得的聚合物适用于在合适的层载体上制备超薄层。

    Optical component based on Langmuir-Blodgett layers
    16.
    发明授权
    Optical component based on Langmuir-Blodgett layers 失效
    基于Langmuir-Blodgett层的光学元件

    公开(公告)号:US5517350A

    公开(公告)日:1996-05-14

    申请号:US366022

    申请日:1994-12-29

    CPC classification number: G02F1/3618 B82Y20/00 G02F1/3616

    Abstract: An optical component comprises an electromagnetic radiation-transparent polymeric medium having a second-order susceptibility of at least 10.sup.-9 electrostatic units where this polymeric medium comprises compounds having polar-aligned noncentrosymmetric molecular dipoles which have as structural element an electron acceptor which is bound to an electron donor via a conjugated .pi.-electron system, which makes possible an oscillation of the molecular dipole between a ground state having a first dipole moment and an electronically excited state having a second dipole moment different from the first, and the nonionic polymeric medium comprises an alternating arrangement of at least one Langmuir-Blodgett film each of at least two different nonionic polymers having nonlinear optical properties. Besides high mechanical and chemical stability the optical component of the invention has excellent nonlinear optical properties, for example frequency-doubling.

    Abstract translation: 光学部件包括具有至少10-9个静电单元的二阶易感性的电磁辐射透明聚合物介质,其中该聚合物介质包含具有极性取向的非中心对称分子偶极子的化合物,其具有作为结构元件的电子受体,其结合到 通过共轭π电子系统的电子给体,其使得可能在具有第一偶极矩的基态和具有不同于第一偶极矩的第二偶极矩的电子激发态之间的分子偶极子的振荡,并且非离子聚合物介质包括 具有至少两种具有非线性光学性质的至少两种不同的非离子聚合物的至少一种Langmuir-Blodgett膜的交替排列。 除了高机械和化学稳定性外,本发明的光学部件具有优异的非线性光学性质,例如倍频。

    Polyurea and film composed of at least one monomolecular layer of a
polyurea
    19.
    发明授权
    Polyurea and film composed of at least one monomolecular layer of a polyurea 失效
    聚氨酯的单分子层组成的聚氨酯和薄膜

    公开(公告)号:US5081212A

    公开(公告)日:1992-01-14

    申请号:US414535

    申请日:1989-09-29

    Abstract: A polyurea of the general formula ##STR1## where X and Y are. independently of one another, a divalent radical whose chain contains in each case at least two carbon atoms, and A and B are, independently of one another, H or (C.sub.1 -C.sub.26)alkyl, and n is an integer greater than 4, which polyurea contains at least one (C.sub.6 -C.sub.26) alkyl group per repeating unit, is prepared by reacting the diamine NHA-X-NHB with roughly the equimolar amount of a diisocyanate OCN-Y-NCO. The polyurea is suitable for preparing ordered monomolecular LB films on a base (film-substrate-system). For this purpose it is dissolved in a volatile organic solvent which is not miscible with water, the solution is spread at the water/air interface, and the layer formed is compressed after the solvent has evaporated and it is transferred to a solid layer base by the Langmuir-Blodgett technique.

    Abstract translation: 其中X和Y是通式为“IMAGE”的聚脲。 彼此独立地是其链中含有至少两个碳原子的二价基团,A和B彼此独立地为H或(C 1 -C 26)烷基,n为大于4的整数,其中 聚脲含有每个重复单元至少一个(C 6 -C 26)烷基,通过使二胺NHA-X-NHB与大约等摩尔量的二异氰酸酯OCN-Y-NCO反应来制备。 聚脲适用于在基底(薄膜 - 基底 - 系统)上制备有序单分子LB薄膜。 为此,将其溶解在与水不混溶的挥发性有机溶剂中,溶液在水/空气界面处扩散,并且在溶剂蒸发后形成的层被压缩,并且通过 Langmuir-Blodgett技术。

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