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    Plastic prods with transparent, scratch resistant surface layer - have surface layer contg silicon, carbon and oxygen, with at least 3 zones of different compsn and specific photoelectron binding energies
    13.
    发明专利
    Plastic prods with transparent, scratch resistant surface layer - have surface layer contg silicon, carbon and oxygen, with at least 3 zones of different compsn and specific photoelectron binding energies 未知

    公开(公告)号：DE4238279A1

    公开(公告)日：1994-05-19

    申请号：DE4238279

    申请日：1992-11-13

    Applicant: BASF AG

    Inventor： HARTH KLAUS DR ,  HIBST HARTMUT DR ,  DEMBOWSKI JUERGEN DR

    IPC: B29C41/08 ,  C08J7/04 ,  C23C16/00 ,  C23C16/30 ,  G02B1/04 ,  C23C16/40 ,  C23C16/50

    Abstract: A plastic object with a transparent surface layer is claimed (I), in which the surface layer contains (at least) Si, C and O and has at least 3 sub-zones as follows: (A) a zone 5-500 nm thick directly on the surface of the plastic object (IA), contg. 1-40 atom% Si, 1-30 atom% O and 40-98 atom% C (w.r.t. Si+O+C), with binding energies of 98-102 eV for the Si 2p-photoelectrons, 284-286 eV for the C ls-photoelectrons and 531-533 eV for the O ls-photoelectrons; (B) a zone 100-2000 nm thick, above zone (A), contg. 10-40 atom% Si, 10-30 atom% O and 20-60 atom% C, with corresp. electron binding energies = 101-103 eV, 283-285 eV and 51-55 eV; (C) a zone 500-10,000 nm thick above (B), contg. 20-40 atom% Si, 30-79 atom% O and 1-40 atom% C, with corresp. binding energies = 102-104 eV, 282-284 eV and 532-534 eV. Also claimed is a process for the prodn. of (I), by coating the plastic (IA) by plasma-assisted chemical deposition, using a gas mixt. contg. silane, siloxane, and/or silazane monomer(s). USE/ADVANTAGE - Used for the prodn. of side windows, headlight lenses, sun roofs, etc. for cars, windows for aircraft, caravans and buildings, glazing for terraces, and greenhouses, advertisement covers, safety glass, lenses for spectacles, sighting devices, optical components, contrast windows for TV etc., optical fibres, solar cells, etc. The invention provides plastic prods. with a colourless highly transparent surface layer with excellent scratch resistance, high UV stability, low water absorption and permeability, excellent chemical resistance, and high adhesion to the substrate. The prodn. process is simple, and can be used with substrates of widely varied geometry.

    15.
    发明专利
    未知

    公开(公告)号：DE4223886A1

    公开(公告)日：1994-01-27

    申请号：DE4223886

    申请日：1992-07-21

    Applicant: BASF AG

    Inventor： HOESSEL PETER DR ,  HARTH KLAUS DR ,  HOFFMANN GERHARD DR ,  HIBST HARTMUT DR

    IPC: C23F1/00 ,  B29C35/08 ,  B29C59/16 ,  G03F7/039 ,  G03F7/11 ,  G03F7/20 ,  H01L21/302

    Abstract: The invention relates to a process for making microstructures having structure depths ranging from several mu m up to the mm range by imagewise irradiation of polymers which have been applied to electrically conductive substrates using an adhesive layer, with synchrotron radiation and removal of the imagewise irradiated regions. The adhesive layer is composed of at least two different chemical elements which are applied by simultaneous vapour deposition or cathode sputtering onto the conductive substrate and are selectively or partly removed before the application of the polymer. The process is suitable for making metal or plastic microstructures.

    16.
    发明专利
    未知

    公开(公告)号：DE3876290D1

    公开(公告)日：1993-01-14

    申请号：DE3876290

    申请日：1988-04-02

    Applicant: BASF AG

    Inventor： BARZYNSKI HELMUT DR ,  HIBST HARTMUT DR ,  WERNER AREND DR

    IPC: G11B7/24 ,  G11B7/253 ,  G11B7/26

    Abstract: Irreversible optical recording medium is based on a substrate with texturised surface and a metal or semiconductor film with an optical absorption of 5-95% and thickness of 10-50 nm. The novelty is that the texture consists of hemispherical structures, which change when exposed to light. The hemispherical structures are pref. arranged statistically and consist of raised or dented areas with a uniform dia. of over 200 nm and up to 500 nm or of different dia. values within this range.

    20.
    发明专利
    未知

    公开(公告)号：DE3580612D1

    公开(公告)日：1991-01-03

    申请号：DE3580612

    申请日：1985-04-22

    Applicant: BASF AG

    Inventor： HIBST HARTMUT DR ,  JAKUSCH HELMUT DR

    IPC: B22F9/22 ,  B22F9/26 ,  C01G49/00 ,  G11B5/706 ,  H01F1/11

    Abstract: Finely divided ferrite powder of the general formula CoxFe3-xO4.5-0.5 x where x is from greater than zero to one, having an essentially isotropic particle shape, is prepared by oxidation of ferrite powder of the composition CoxFe3-xO4, where x has the same limits, with an oxygen-containing gas at from 150 DEG to 500 DEG C.

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