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公开(公告)号：DE4141838A1
公开(公告)日：1993-06-24
申请号：DE4141838
申请日：1991-12-18
Applicant: BASF MAGNETICS GMBH
Inventor： BOBRICH MICHAEL DR , LEHNER AUGUST , ROLLER HERMANN , SUETTINGER RUDOLF DR , KRESS RIA DR , SCHNEIDER NORBERT , LENZ WERNER DR , ENGELHARDT PETER , RUDOLF PETER DR , BRODT GREGOR DR
Abstract: The material has magnetisable layer(s) on a nonmagnetic carrier, and contains a binder mixt. of a polyurethane urea (meth)acrylate (1) and polyurethane elastomer, a high MW OH- gp. contg. polyurethane urea and/or a low MW OH- contg. polyurethane urea. (1) is made by reaction of a poly(meth)acrylate with up to 2 OH-end gps. and a MW 200-50000 and a mixt. aliphatic polyisocyanates with an NCO- functionality of 3-6 per mole. The polyisocyanates contain 0.1-10 wt.% of diisocyanates, 20-80 wt.% triisocyanates and 20-60 wt.% of isocyanates with a functionality of 4-10. There are 1.2-3 NCO gps. per OH gp., and the remaining NCO gps are converted to urea gps. with ammonia or with prim. or sec. amines.
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公开(公告)号：DE4233999A1
公开(公告)日：1994-04-14
申请号：DE4233999
申请日：1992-10-09
Applicant: BASF MAGNETICS GMBH
Inventor： LATZEL WERNER DR , ENGELHARDT PETER , RUDOLF PETER DR , SCHWARZ LOTHAR , HEILMANN PETER DR , ROLLER HERMANN , LEHNER AUGUST
Abstract: Magnetic recording media with a coating on the reverse side is produced, consisting of a non-magnetic substrate, a magnetic coating on the main side, and, on the other side, a coating made up of a polymer binder, non-magnetic fillers, pigments, dispersing agents and other usual additives. The material for this reverse coating is produced by separately mixing the various solid particles and additives with part of a solution of the binder so as to coat the particles with the organic substances concerned; this mix is next dispersed by means of a ball mill, metered quantities of the dispersion obtained plus the remaining solution of binder are then intensively mixed in a toothed colloid mill against the direction of feed before being applied to the reverse side of the sheeting. ADVANTAGE - The method produces stable dispersions from a wide variety of solid materials. It does so with a high space-time output. Existing types of dispersion can be used without increasing the quantity of dispersion agent. It improves the fault count in the reverse side layer and hence improves the recording quality of the medium.
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Patent Agency Ranking
公开(公告)号：DE4216847A1
公开(公告)日：1993-11-25
申请号：DE4216847
申请日：1992-05-21
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , ENGELHARDT PETER , BAUR REINHOLD DR , BOBRICH MICHAEL DR , LATZEL WERNER DR , LENZ WERNER DR , SUETTINGER RUDOLF DR
Abstract: The invention relates to flexible magnetic recording carriers essentially comprising a sheet-like (web-like) nonmagnetic substrate, a magnetic layer applied to the first main side of the sheet-like substrate, and a backing layer formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers and supporting pigments, where the backing layer contains a precipitation silicic acid (silica) coated on the surface with a phosphate group-containing polyurethane.
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公开(公告)号：DE59304159D1
公开(公告)日：1996-11-21
申请号：DE59304159
申请日：1993-05-13
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , ENGELHARDT PETER , BAUR REINHOLD DR , BOBRICH MICHAEL DR , LATZEL WERNER DR , LENZ WERNER DR , SUETTINGER RUDOLF DR
Abstract: The invention relates to flexible magnetic recording carriers essentially comprising a sheet-like (web-like) nonmagnetic substrate, a magnetic layer applied to the first main side of the sheet-like substrate, and a backing layer formed on the opposite main side of the substrate from a polymeric binder and nonmagnetic fillers and supporting pigments, where the backing layer contains a precipitation silicic acid (silica) coated on the surface with a phosphate group-containing polyurethane.
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公开(公告)号：DE59205483D1
公开(公告)日：1996-04-04
申请号：DE59205483
申请日：1992-12-02
Applicant: BASF MAGNETICS GMBH
Inventor： BOBRICH MICHAEL DR , LEHNER AUGUST , ROLLER HERMANN , SUETTINGER RUDOLF DR , KRESS RIA DR , SCHNEIDER NORBERT , LENZ WERNER DR , ENGELHARDT PETER , RUDOLF PETER DR , BRODT GREGOR DR , BALZ WERNER DR , KOHL ALBERT
IPC: C09D175/16 , C08G18/10 , C08G18/62 , C09D4/02 , C09D5/23 , C09D175/14 , G11B5/702
Abstract: The invention relates to magnetic recording media comprising a non-magnetic carrier material and at least one magnetizable layer, applied adherently thereto, based on a magnetic material dispersed in at least one polyurethane and a polyurethane urea (meth)acrylate, where the polyurethane urea (meth)acrylate is obtained by reacting a hydroxyl-containing poly(meth)acrylate with a mixture of diisocyanates and polyisocyanates and converting the NCO groups which remain into urea groups by means of ammonia or primary or secondary amines.
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公开(公告)号：DE59203265D1
公开(公告)日：1995-09-21
申请号：DE59203265
申请日：1992-05-13
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , HEILMANN PETER DR , HITZFELD MICHAEL DR , STOCKBURGER DIETER DR , LATZEL WERNER DR , BAUR REINHOLD DR , ENGELHARDT PETER , ROTHFUSS EDWIN , GRAU WERNER DR , LENZ WERNER DR
IPC: C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/704
Abstract: The invention relates to flexible magnetic recording supports (media) which are essentially composed of a sheet-type nonmagnetic substrate, a magnetic layer applied to one principal side of the sheet-type substrate and a back layer formed on the opposite principal side of the substrate and composed of a polymeric binder, at least one filler, at least one auxiliary pigment and polyolefin particles having a spherical shape.
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公开(公告)号：DE4117980A1
公开(公告)日：1992-12-03
申请号：DE4117980
申请日：1991-05-31
Applicant: BASF MAGNETICS GMBH
Inventor： ROLLER HERMANN , HEILMANN PETER DR , HITZFELD MICHAEL DR , STOCKBURGER DIETER DR , LATZEL WERNER DR , BAUR REINHOLD DR , ENGELHARDT PETER , ROTHFUSS EDWIN , GRAU WERNER DR , LENZ WERNER DR
IPC: C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735
Abstract: The invention relates to flexible magnetic recording supports (media) which are essentially composed of a sheet-type nonmagnetic substrate, a magnetic layer applied to one principal side of the sheet-type substrate and a back layer formed on the opposite principal side of the substrate and composed of a polymeric binder, at least one filler, at least one auxiliary pigment and polyolefin particles having a spherical shape.
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