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公开(公告)号：JPS5226202A
公开(公告)日：1977-02-26
申请号：JP9750676
申请日：1976-08-17
Applicant: BASF AG
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2.发明专利
公开(公告)号：DE2357517A1
公开(公告)日：1975-05-28
申请号：DE2357517
申请日：1973-11-17
Applicant: BASF AG
Inventor： HARTMANN JOB-WERNER DIPL CHEM , FALK ROLAND DIPL CHEM DR , KRUG ARIBERT , HUBER GEORG , BALZ WERNER DIPL CHEM DR , MAHLER KARL DIPL ING DR
Abstract: The film undergoing the magnetisation process may be applied to both sides of the metallic disc. The film is a mixture of binding material and anisotropic magnetic particles and is applied on the disc in a liquid form. It is spread by centrifugal force, with the disc rotating at high speed. It is magnetised, hardened, ground and then polished. One pair of poles is so arranged that magnetism spreads into the symmetrical plane and forms another even shaped pole pair but of opposite polarity and which converges pointed to the symmetry plane. The distance between the magnetic crests is greater than that of the pole faces and the flux density greates near the poles. The position of the poles is adjustable; during the film application they move toward each other. With this method of film application the reading potential is improved by 50%.
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公开(公告)号：NL7609132A
公开(公告)日：1977-02-22
申请号：NL7609132
申请日：1976-08-17
Applicant: BASF AG
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公开(公告)号：GB1562601A
公开(公告)日：1980-03-12
申请号：GB3433176
申请日：1976-08-18
Applicant: BASF AG
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公开(公告)号：DE2254981A1
公开(公告)日：1974-06-12
申请号：DE2254981
申请日：1972-11-10
Applicant: BASF AG
Inventor： MAHLER KARL DIPL ING DR , FEHRENBACH HUBERT , KRUG ARIBERT , FALE ROLAND DR
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Patent Agency Ranking
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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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：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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