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公开(公告)号：DE3010873A1
公开(公告)日：1981-10-01
申请号：DE3010873
申请日：1980-03-21
Applicant: BASF AG
Inventor： KOESTER EBERHARD DIPL PHYS DR , DEIGNER PAUL DIPL CHEM DR , SCHAEFER DIETER DIPL CHEM DR , UHL KARL DIPL ING DR , FALK ROLAND DIPL CHEM DR
Abstract: A device for magnetically orienting the magnetizable particles of magnetic recording media in a preferred direction, which media are obtained by applying a coating of anisotropically magnetic particles finely dispersed in a solution of an organic binder system and conventional additives to a non-magnetic base, and subsequently solidifying the coating, by the action, on the still fluid coating, of the magnetic fields produced by two E-shaped electromagnets arranged symmetrically with respect to, and in mirror-image relationship to, the plane of the said coating.
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公开(公告)号：DE2910807A1
公开(公告)日：1980-09-25
申请号：DE2910807
申请日：1979-03-20
Applicant: BASF AG
Inventor： DEIMLING KARL , FALK ROLAND DIPL CHEM DR , KRUG ARIBERT , NAGEL PETER DIPL ING , SAND RUDOLF
Abstract: A process for polishing the ground surfaces of magnetic storage disks which consist of a rigid substrate provided on both sides with a firmly adhering magnetic coating consisting of a magnetic material finely dispersed in an organic polymer and conventional additives, by pressing felt rings or felt disks against the moving magnetic storage disk, to the surface of which an aqueous emulsion containing butyl acetate with or without butane-1,4-diol is applied.
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公开(公告)号：DE2606832A1
公开(公告)日：1977-09-08
申请号：DE2606832
申请日：1976-02-20
Applicant: BASF AG
Inventor： JAKUSCH HELMUT DIPL PHYS DR , SAPPOK REINHARD DIPL CHEM DR , SCHOENAFINGER EDUARD DIPL CHEM , SCHNEEHAGE HANS HENNIG DIPL CH , LOEWENBERG GUSTAV DIPL ING , GRAU WERNER DIPL CHEM DR , MAHLER KARL DIPL ING DR , FALK ROLAND DIPL CHEM DR
Abstract: Magnetic recording material is prepd. by intensive mixing of needle-like magnetic pigment and a carrier liq. comprising a synthetic organic binder and a dispersing agent to a paste and subsequent drying and granulating to a free flowing pigment mixt. The pigment mixt. is conventionally mixed with a synthetic organic binder, solvent and opt. other additives to form a dispersion which is coated thinly and evenly with simultaneous alignment of the needle-like pigment onto a support and dried. The recording material has improved packing in the binder and improved alignment. In a example, Fe2O3 powder was mixed with a polyesterurethane, dried, granulated, dispersed in a vinyl chloride copolymer soln. and coated onto a PET support.
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Patent Agency Ranking
公开(公告)号：DE2459541A1
公开(公告)日：1976-07-01
申请号：DE2459541
申请日：1974-12-17
Applicant: BASF AG
Inventor： KOESTER EBERHARD DIPL PHYS DR , DEIGNER PAUL DR , FALK ROLAND DIPL CHEM DR , UHL KARL DIPL ING DR , SCHAEFER DIETER DIPL CHEM DR , MAYER DIETER DR , MOTZ HERBERT DIPL ING DR , FELLEISEN PETER DIPL ING
Abstract: The invention relates to an improved process for the manufacture of magnetic discs carrying very thin magnetic layers, by applying a fluid dispersion of magnetic materials in a binder mixture to rigid base discs by the spin-coating process. Above the side of the base disc which is to be provided with the magnetic layer, there are arranged means which produce an aerodynamic boundary layer above the discs during rotation of the latter. This avoids the formation of surface irregularities and of coating streaks during production of the layer by spin-coating.
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公开(公告)号：DE2451276A1
公开(公告)日：1976-05-06
申请号：DE2451276
申请日：1974-10-29
Applicant: BASF AG
Inventor： WUNSCH GERD DIPL CHEM DR , DEIGNER PAUL DR , FALK ROLAND DIPL CHEM DR , MAHLER KARL DIPL ING DR , LOESER WERNER DIPL ING DR , DOMAS FRIEDRICH DIPL ING , FELLEISEN PETER DIPL ING , STECK WERNER DIPL CHEM DR
Abstract: A process for the manufacture of rigid magnetic recording media by depositing a cobalt-containing ferromagnetic metal layer on a non-magnetic metallic base disc provided with a cured layer of binder which does not dissolve or swell in organic solvents and contains non-magnetic pigments, and which has been activated, before deposition of the ferromagnetic layer, by treatment with a solution of a palladium (O) complex in an organic solvent, followed by decomposition of this complex, to prepare it to receive the ferromagnetic metal layer which is produced by electroless deposition.
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公开(公告)号：DE2440920A1
公开(公告)日：1976-03-11
申请号：DE2440920
申请日：1974-08-27
Applicant: BASF AG
Inventor： KOESTER EBERHARD DIPL PHYS DR , DEIGNER PAUL DR , FALK ROLAND DIPL CHEM DR , UHL KARL DIPL ING DR , SCHAEFER DIETER DIPL CHEM DR
Abstract: A device for manufacturing magnetic recording media in which the magnetic particles in the recording layer are oriented in a preferred direction, the fluid coating applied to the base being subjected to the action of a magnetic field produced in the air gaps between the spaced apart poles of two magnetic circuits, one on each side of the coated face, arranged symmetrically with respect to the plane of the coated base, the edges of the poles adjacent to the coated base terminating in screening elements shaped in such a way that the distance between the surfaces of the screening elements facing the coated base and the coated base itself increases as the screening elements extend away from the edges of the poles. A high degree of magnetic anisotropy in the recording layer can also be obtained when the magnetic circuits are at a relatively large distance from the still fluid magnetic coating.
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27.发明专利
公开(公告)号：DE2410823A1
公开(公告)日：1975-09-18
申请号：DE2410823
申请日：1974-03-07
Applicant: BASF AG
Inventor： FALK ROLAND DIPL CHEM DR , KRUG ARIBERT , FEHRENBACH HUBERT , MAHLER KARL DIPL ING DR
Abstract: The discs are faced using diamond tools whilst being held by vacuum onto a faceplate. The faceplate has a layer of resilient material on which the storage disc is seated during facing. The resilient material, e.g. rubber or plastics has a modulus of between 25 and 180 kp/cm2, a Shore A hardness between 30 and 90, a compression set according to DIN 53517 of below 10%, and good grindability. The thickness of the layer is pref. between 0.2 and 5 mm. Facing may be carried out in two stages with different resilient materials and intermediate stress-relieving of the discs.
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公开(公告)号：DE2319363A1
公开(公告)日：1974-11-07
申请号：DE2319363
申请日：1973-04-17
Applicant: BASF AG
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