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

IPC: G11B5/66 ,  G11B5/73 ,  G11B5/733 ,  G11B5/735 ,  G11B5/704

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.

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.

公开(公告)号：DE4039748A1

公开(公告)日：1992-06-17

申请号：DE4039748

申请日：1990-12-13

Applicant: BASF MAGNETICS GMBH

Inventor： KEPPLER UWE DR ,  BOBRICH MICHAEL DR ,  AUWETER HELMUT DR ,  SUETTINGER RUDOLF DR ,  KOHL ALBERT ,  DICKOW HERMANN DR ,  LENZ WERNER DR ,  BRODT GREGOR DR

IPC: C08G18/08 ,  C08G18/12 ,  C09D5/00 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

Abstract: In magnetic recording media consisting of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consists of not less than 50% by weight of an isocyanate-free, branched polyurethane which is soluble in tetrahydrofuran and has sulfonate groups along the polyurethane branches and OH-containing urea groups at the chain ends and a molecular weight of from 4,000 to 30,000.

公开(公告)号：DE59102837D1

公开(公告)日：1994-10-13

申请号：DE59102837

申请日：1991-12-03

Applicant: BASF MAGNETICS GMBH

Inventor： KEPPELER UWE DR ,  BOBRICH MICHAEL DR ,  AUWETER HELMUT DR ,  SUETTINGER RUDOLF DR ,  KOHL ALBERT ,  DIKOW HERMANN DR ,  LENZ WERNER DR ,  BRODT GREGOR DR

IPC: C08G18/08 ,  C08G18/12 ,  C09D5/00 ,  C09D5/23 ,  C09D127/04 ,  C09D127/06 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

Abstract: In magnetic recording media consisting of a nonmagnetic substrate and one or more magnetizable layers bonded thereon and based on a polyurethane binder, the binder consists of not less than 50% by weight of an isocyanate-free, branched polyurethane which is soluble in tetrahydrofuran and has sulfonate groups along the polyurethane branches and OH-containing urea groups at the chain ends and a molecular weight of from 4,000 to 30,000.

公开(公告)号：DE4241506A1

公开(公告)日：1994-06-16

申请号：DE4241506

申请日：1992-12-10

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR DR ,  DIKOW HERMANN DR ,  AUWETER HELMUT DR ,  BOBRICH MICHAEL DR ,  KOHL ALBERT ,  SUETTINGER RUDOLF DR ,  RUDOLPH JOCHEN DR

IPC: C08G18/38 ,  C09D5/23 ,  G11B5/702 ,  C08G18/32 ,  C08G18/65 ,  C09D175/00

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

IPC: C08G18/10 ,  C08G18/62 ,  G11B5/702

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.

公开(公告)号：DE59101674D1

公开(公告)日：1994-06-23

申请号：DE59101674

申请日：1991-11-29

Applicant: BASF MAGNETICS GMBH

Inventor： KEPPELER UWE DR ,  DIKOW HERMANN DR ,  AUWETER HELMUT DR ,  BOBRICH MICHAEL DR ,  RUDOLPH JOCHEN DR ,  BRODT GREGOR DR ,  KOHL ALBERT ,  LENZ WERNER DR ,  SUETTINGER RUDOLF DR

IPC: C08G18/65 ,  C08G18/08 ,  C08G18/12 ,  C09D5/00 ,  C09D5/23 ,  C09D175/04 ,  G11B5/02 ,  G11B5/702

Abstract: In magnetic recording materials composed of a nonmagnetic backing material and at least one magnetisable layer adhesively applied thereto and based on a polyurethane binder, at least 50% by weight of the binder is composed of a branched polyurethane elastomer which contains sulphonate groups and has urea groups at the chain ends.

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

IPC: G11B5/66 ,  G11B5/73 ,  G11B5/733 ,  G11B5/735 ,  G11B5/72

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.

公开(公告)号：DE4039749A1

公开(公告)日：1992-06-17

申请号：DE4039749

申请日：1990-12-13

Applicant: BASF MAGNETICS GMBH

Inventor： KEPPLER UWE DR ,  DIKOW HERMANN DR ,  AUWETER HELMUT DR ,  RUDOLPH JOCHEN DR ,  BRODT GREGOR DR ,  KOHL ALBERT ,  LENZ WERNER DR ,  SUETTINGER RUDOLF DR

IPC: C08G18/65 ,  C08G18/08 ,  C08G18/12 ,  C09D5/00 ,  C09D5/23 ,  C09D175/04 ,  G11B5/02 ,  G11B5/702

Abstract: In magnetic recording materials composed of a nonmagnetic backing material and at least one magnetisable layer adhesively applied thereto and based on a polyurethane binder, at least 50% by weight of the binder is composed of a branched polyurethane elastomer which contains sulphonate groups and has urea groups at the chain ends.