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公开(公告)号：DE3217099A1
公开(公告)日：1983-11-10
申请号：DE3217099
申请日：1982-05-07
Applicant: BASF AG
Inventor： MELZER MILENA DIPL ING , JAKUSCH HELMUT DIPL PHYS DR , GRAU WERNER DIPL CHEM DR , KOESTER EBERHARD DIPL PHYS DR , LOESER WERNER DIPL ING DR , POLKE REINHARD DIPL PHYS DR , SCHAEDEL GUENTER DIPL ING DR , OHLINGER MANFRED DIPL CHEM DR , VAETH GUENTER
IPC: G11B5/70 , C09D5/23 , G11B5/68 , G11B5/706 , G11B5/84 , H01F1/11 , H01F1/113 , H01F1/44 , H01F41/16
Abstract: A magnetic dispersion which can be applied to a non-magnetic base to produce a recording medium is prepared by dispersing a magnetically anisotropic material in a polymer binder and in an organic solvent by a method wherein the magnetically anisotropic material is worked in a jet mill before and/or during dispersing.
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公开(公告)号：DE2945203A1
公开(公告)日：1981-06-04
申请号：DE2945203
申请日：1979-11-09
Applicant: BASF AG
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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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