中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

7 records (took 0.018 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE4416330A1

    公开(公告)日：1995-11-16

    申请号：DE4416330

    申请日：1994-05-09

    Applicant: HOECHST AG

    Inventor： SCHEUNEMANN UDE DR ,  ALTHOFF OLAF DR ,  HICKEL WERNER DR ,  APPEL GUNTHER ,  BAUER JACQUELINE ,  GEIS GERHARD

    IPC: B01D69/12 ,  B01D71/70 ,  B32B5/18 ,  C08J3/24 ,  C08J5/18 ,  C08L83/02 ,  C08L83/04 ,  B01D67/00 ,  B01D61/36 ,  B01D53/22

    Abstract: The prodn. of composite membranes comprises spreading a soln. of a polymer (I) in a volatile solvent on water. Allowing the solvent to evaporate, crosslinking the polymer and transferring the film obtd. to a supporting membrane. Also claimed is a composite membrane with polymer layer(s) on a porous base membrane, obtd. by this process. (I) is a polysiloxane which is pref. crosslinked via OH gps. on the polymer, with the aid of a bi-, tri- or tetra-functional silane with hydrolysable SiO- gps. as crosslinker (II), pref. triacetoxy-methyl-silane (TACMS), in the presence of a catalyst, pref. a tin salt. Alternatively, (I) may be a polymer contg. olefinic double bonds, which is crosslinked by irradiation. Pref. polymer layer is a protective layer of polysiloxane, crosslinked via OH gps. to a structure contg. units of formula Si(O-)4, R-Si(O-)3 or RR Si(O-)2 (with R, R = alkyl, phenyl or vinyl), or a silicone which is crosslinked by irradiation.

    3.
    发明专利
    未知

    公开(公告)号：DE59302244D1

    公开(公告)日：1996-05-23

    申请号：DE59302244

    申请日：1993-08-03

    Applicant: HOECHST AG

    Inventor： APPEL GUNTHER ,  BAUER JACQUELINE ,  HICKEL WERNER DR ,  LUPO DONALD DR ,  PRASS WERNER DR ,  SCHEUNEMANN UDE DR

    IPC: B05C3/09 ,  B05C3/132 ,  B05D1/20

    Abstract: For the continuous production of an ultra-thin, ordered layer of amphiphilic molecules on the surface of a polar liquid, an aligned flow of the polar liquid is generated in a channel, which polar liquid contains the amphiphilic molecules, dissolved or undissolved, on the surface in spread form. In the channel, a channel section with relatively high flow rate at the surface is provided, which section has a ramp which is arranged on the channel bottom and over which the polar liquid flows. Following this there is a channel section with a relatively low flow rate at the surface, in which channel section the flow is dammed at an obstruction with the liquid level constant over time, so that an ultra-thin, ordered layer of amphiphilic molecules continuously forms, as a result of flow compression, at the polar liquid/air phase boundary in these channel sections. The ramp over which the liquid flows is arranged so as to be movable.

    Composite membrane useful for gas sepn. and pervaporation
    4.
    发明专利
    Composite membrane useful for gas sepn. and pervaporation 未知

    公开(公告)号：DE19516908A1

    公开(公告)日：1995-11-16

    申请号：DE19516908

    申请日：1995-05-09

    Applicant: HOECHST AG

    Inventor： ALTHOFF OLAF DR ,  FALK UWE DR ,  SCHEUNEMANN UDE DR ,  PRAS WERNER DR ,  HICKEL WERNER DR

    IPC: B01D53/22 ,  B01D69/12 ,  B01D71/32 ,  B01D71/36 ,  B01D71/38 ,  B05D1/20 ,  B32B5/18 ,  B32B27/00 ,  B32B27/08 ,  B32B27/16 ,  B32B27/30 ,  B01D67/00 ,  B01D61/36

    Abstract: A composite membrane comprises a porous base membrane (A) and a fluorine-contg. perm-selective layer (C) 10-500 nm thick consisting of a copolymer of: (a) 10-80 mole% units of a vinyl ester of formula (I); (b1) 5-40 mole% vinyl alcohol units of formula (II) or (b2) 5-50 mole% units of formula (III); and (c) at least 10 mole% fluoro-olefin, with the OH gp.-contg. chains crosslinked with one another. In the formula, R1-R3 = H, alkyl, cycloalkyl or aryl, with a total of 5-30 C atoms over all 3 gps.; R4 = OH, opt. with up to 10% of the gps. R4 replaced by -OCOR5 (with R5 = Me, Et or Pr); R6 = 1-6C linear or branched alkylene. Also claimed is a process for the prodn. of this membrane, by dissolving the above terpolymer in a solvent, mixing with a polyfunctional isocyanate, spreading the soln. on water, evaporating the solvent and transferring the layer (C) thus obtd. to a base membrane (A). Also claimed is a membrane as described above in which the copolymer in layer (C) is uncrosslinked. Preferably, R1-R3 = alkyl or cycloalkyl with a total of 7-9 C atoms, pref. with at least one of these gps. = Me; R6 = 1,4-butylene.

Patent Agency Ranking