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公开(公告)号：AT59727T
公开(公告)日：1991-01-15
申请号：AT86104348
申请日：1986-03-29
Applicant: BASF AG
Inventor： BOEHM UDO , SCHAEFER DIETER DR , WEBER ADAM
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公开(公告)号：DE3524419A1
公开(公告)日：1987-01-15
申请号：DE3524419
申请日：1985-07-09
Applicant: BASF AG
Inventor： BOEHM UDO DIPL ING , SCHAEFER DIETER DR , WEBER ADAM
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公开(公告)号：DE3168102D1
公开(公告)日：1985-02-21
申请号：DE3168102
申请日：1981-03-10
Applicant: BASF AG
Inventor： KOESTER EBERHARD DR , DEIGNER PAUL DR , SCHAEFER DIETER DR , UHL KARL DR , FALK ROLAND 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：DE3061463D1
公开(公告)日：1983-02-03
申请号：DE3061463
申请日：1980-02-04
Applicant: BASF AG
Inventor： STECK WERNER DR , RUDOLF PETER DR , HUEBNER WERNER , AUTZEN HORST DR , JAKUSCH HELMUT DR , SCHAEFER DIETER DR , VAETH GUENTER
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公开(公告)号：DE2255028A1
公开(公告)日：1974-06-12
申请号：DE2255028
申请日：1972-11-10
Applicant: BASF AG
Inventor： HARTMANN JOB WERNER DR , OSTERTAG WERNER DR , SAND RUDOLF , SCHAEFER DIETER DR , HARTMANN HANS JOERG DR
Abstract: The invention relates to magnetic discs in which first a non-magnetic intermediate layer and then the magnetic coating are applied by conventional methods to an aluminum disc. The intermediate layer applied to the non-magnetic metallic carrier disc is a hard non-magnetic coating which can be polished and which consists of a dispersion of a pulverulent mixture of finely divided inorganic non-magnetic pigments having a Mohs' hardness of at least 7 in a binder which can be cured and which provides firm cohesion of the pigment particles and good adhesion thereof to the non-magnetic base disc, the pigment mixture containing at least 3 percent by weight of corundum powder having a particle size of from about 1 to 20 mu u. Magnetic discs with very thin magnetic coatings which possess good magnetic and mechanical properties and whose thickness varies only minimally are thus produced in a simple manner.
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Patent Agency Ranking
公开(公告)号：DE3676362D1
公开(公告)日：1991-02-07
申请号：DE3676362
申请日：1986-03-29
Applicant: BASF AG
Inventor： BOEHM UDO , SCHAEFER DIETER DR , WEBER ADAM
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公开(公告)号：DE3264672D1
公开(公告)日：1985-08-14
申请号：DE3264672
申请日：1982-09-09
Applicant: BASF AG
Inventor： BACHMANN RUDOLF DR , BALZ WERNER DR , GRAU WERNER DR , GUTERMANN WINFRIED , KOVACS JENOE DR , KRUCKER KARL DR , RUDOLF PETER , SCHAEFER DIETER DR , HACK JOACHIM
IPC: C09D5/23 , C09D137/00 , G11B5/70 , G11B5/702
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公开(公告)号：DE2459766A1
公开(公告)日：1976-07-01
申请号：DE2459766
申请日：1974-12-18
Applicant: BASF AG
Inventor： SCHOENAFINGER EDUARD DR , DEIGNER PAUL DR , KOESTER EBERHARD DR , OHLINGER MANFRED DR , SCHAEFER DIETER DR , STUMPFI WERNER DR
Abstract: Chromium dioxide magnetic pigments are stabilised against loss of magnetic properties by (a) treating an alcoholic or aq. alcoholic suspension of the pigment with a hydrolysis prod. of a silane RnSi(CR')4-n where R = 3-18 C aliphatic org. gp., R' = 1-8C aliphatic org. gp. and n=1-3, such that it remains at least partially on the surface of the pigment after separating the pigment from the medium, and (b) drying the treated pigment at ca 50-200 degrees C. gives pigments useful in making magnetic tapes etc. which are resistant to loss of magnetic properties under advers (hot and moist) climatic conditions; gives better protection than known processes in which e.g. a thin chromium oxide layer or an inorg. metal phosphate layer is deposited on the pigment surface. The pigments also have improved dispersibility and processability.
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公开(公告)号：DE3573346D1
公开(公告)日：1989-11-02
申请号：DE3573346
申请日：1985-07-22
Applicant: BASF AG
Inventor： BALZ WERNER DR , KOVACS JENOE DR , LECHNER HILMAR , SCHAEFER DIETER DR , BUETHE INGOLF DR
IPC: G11B5/702 , C08F299/02 , C09D5/23 , C09D171/00 , C09D171/12 , C09D175/06 , G11B5/73 , G11B5/738 , G11B5/842 , G11B5/704
Abstract: Layer-type magnetic recording media are produced by applying a dispersion of a magnetically anisotropic material in a binder solution onto a flexible plastic base provided with an adhesion-promoting layer and then solidifying the magnetic layer, by a method in which the adhesion-promoting layer consists of a radiation-curable aqueous dispersion of a polymer.
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公开(公告)号：DE3377830D1
公开(公告)日：1988-09-29
申请号：DE3377830
申请日：1983-04-05
Applicant: BASF AG
Inventor： SCHAEFER DIETER DR , FELLEISEN PETER , DOMAS FRIEDRICH , MAYER DIETER DR
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