公开(公告)号：JPH08333435A

公开(公告)日：1996-12-17

申请号：JP10980596

申请日：1996-04-30

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR ,  SCHELBLE JOSEF ,  LEHNER AUGUST ,  WEINGART FRANZ ,  KOHL ALBERT ,  KRESS RIA ,  SCHNEIDER NORBERT

IPC: C08L75/04 ,  C08G18/10 ,  C08G18/62 ,  C08G18/65 ,  C08G18/83 ,  C08L75/00 ,  C08L101/00 ,  C08L101/12 ,  C09D5/23 ,  G11B5/702 ,  G11B5/73 ,  G11B5/704

公开(公告)号：JPH0850717A

公开(公告)日：1996-02-20

申请号：JP356695

申请日：1995-01-12

Applicant: BASF MAGNETICS GMBH

Inventor： WUENSCH THOMAS ,  BRODT GREGOR ,  KRESS RIA ,  SCHNEIDER NORBERT ,  KOHL ALBERT ,  LEHNER AUGUST ,  BALZ WERNER

IPC: C08G18/12 ,  C08G18/61 ,  C08G18/65 ,  C08G18/66 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

Abstract: PURPOSE: To provide a coupling agent having improved mechanical characteristics, such as, limit strength, hardness, wear resistance and elasticity, and exhibiting a high crosslinking speed, by causing the coupling agent to contain polyurethane made of predetermined components and a material having a specified molecular weight. CONSTITUTION: Polyurethane contains 1mol of diol having an average molecular weight of 400-4000, 0.3-9mol of aliphatic compound having 2-18 carbon atoms, 0.3-9mol of aromatic diol having 8-30 carbon atoms, and 0.01-1mol of trivalent alcohol having 3-8 carbon atoms. The polyurethane further contains 0.01-1mol of multivalent alcohol having 3-14 carbon atoms and tertiary amino group, and diisocyanate having 6-30 carbon atoms with a molar ratio of isocyanate group to all hydroxyl groups being 1.05:1-1.4:1. This polyurethane and a predetermined compound are caused to react under specified conditions to provide a material having an average molecular weight of 4000-30000, thereby forming a magnetic recording medium.

公开(公告)号：GB2282338B

公开(公告)日：1997-08-20

申请号：GB9419183

申请日：1994-09-22

Applicant: BASF MAGNETICS GMBH ,  EMTEC MAGNETICS GMBH

Inventor： BRODT GREGOR ,  VASS ATTILA ,  LOCH WERNER ,  LEHNER AUGUST ,  LENZ WERNER ,  SCHNEIDER NORBERT

IPC: C08G18/10 ,  C08G18/62 ,  C08G18/78 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  C08L75/04

Abstract: In magnetic recording media consisting of a nonmagnetic substrate and at least one magnetizable layer firmly applied thereon and based on magnetic material dispersed in a binder mixture which contains at least one hydroxyl-containing, preferably low molecular weight polyureaurethane and one polyurethaneurea (meth)acrylate, the polyurethaneurea (meth)acrylate is obtained by reacting a poly(meth)acrylate having up to 2 terminal OH groups per mol and a molecular weight of from 200 to 50,000 with a mixture of aliphatic polyisocyanates having an average functionality of from 3.0 to 6.0 NCO groups per mol, consisting of from 0.1 to 10% by weight of a diisocyanate, from 30 to 80% by weight of a triisocyanate and from 20 to 60% by weight of an isocyanate having a functionality of from 4 to 10, with the proviso that from 1.2 to 3.0 NCO groups react per OH group and the remaining NCO groups are converted into substituted terminal urea groups with a polyfunctional amine or with a mixture of different polyfunctional amines.

公开(公告)号：DE59304266D1

公开(公告)日：1996-11-28

申请号：DE59304266

申请日：1993-08-10

Applicant: BASF MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  SCHNEIDER NORBERT ,  ROLLER HERMANN ,  BALZ WERNER DR ,  LENZ WERNER DR ,  KOHL ALBERT

IPC: C09D183/04 ,  C09D5/23 ,  C10M107/04 ,  C10M107/06 ,  C10M107/50 ,  C10N40/18 ,  G11B5/708 ,  G11B5/71

Abstract: The invention relates to magnetic recording media obtained by preparing a dispersion of an anisotropic magnetic material and conventional additives in a solution of a polymer binder in an organic solvent, coating the dispersion onto a non-magnetisable support material, subsequently aligning the anisotropic magnetic material in a magnetic field and solidifying the applied magnetic coating, where the magnetic coating contains finely divided organic hydrophobic supporting pigments and a high-viscosity polysiloxane.

公开(公告)号：GB2282338A

公开(公告)日：1995-04-05

申请号：GB9419183

申请日：1994-09-22

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR ,  VASS ATTILA ,  LOCH WERNER ,  LEHNER AUGUST ,  LENZ WERNER ,  SCHNEIDER NORBERT

IPC: C08G18/10 ,  C08G18/62 ,  C08G18/78 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  C08L75/04

Abstract: A magnetic recording medium comprises a nonmagnetic substrate and at least one magnetizable layer firmly applied thereon and based on a magnetic material dispersed in a binder mixture which contains at least one hydroxyl-containing, preferably low molecular weight, polyureaurethane and at least one polyurethane-urea (meth)acrylate. The polyurethane-urea (meth)acrylate is obtained by reacting a poly(meth)acrylate having up to 2 terminal OH groups per mol and a molecular weight of from 200 to 50,000 with a mixture of aliphatic polyisocyanates having an average functionality of from 3.0 to 6.0 NCO groups per mol. The mixture comprises from 0.1 to 10% by weight of a diisocyante, from 30 to 80% by weight of a triisocyanate, and from 20 to 60% by weight of an isocyanate having a functionality of from 4 to 10. From 1.2 to 3.0 NCO groups react per OH group and the remaining NCO groups are converted into substituted terminal urea groups with a polyfunctional amine or with a mixture of two or more different polyfunctional amines.

公开(公告)号：DE4142643A1

公开(公告)日：1993-06-24

申请号：DE4142643

申请日：1991-12-21

Applicant: BASF MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  SCHNEIDER NORBERT ,  BALZ WERNER DR ,  LENZ WERNER DR ,  KOHL ALBERT ,  BETTINGER GUENTER ,  KLEIN URSULA

IPC: F02B75/02 ,  G11B5/708

Abstract: A magnetic recording material is produced using a dispersion of anisotropic magnetic material and additional material in a solution of a polymer binding agent and an organic fluid. The mixture is spread over the surface of a non magnetic corner and the magnetic particles are oriented by a magnetic filed. Te mixture has carbon containing water repellent polysilicic acid of 0.3 to 5 percent by weight in combination with 0il to 0.5 percent by weight high viscosity polysiloxane. ADVANTAGE - High wear resistant fine particle structur%

公开(公告)号：DE4141839A1

公开(公告)日：1993-06-24

申请号：DE4141839

申请日：1991-12-18

Applicant: BASF MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  SCHNEIDER NORBERT ,  BOBRICH MICHAEL DR ,  LENZ WERNER DR ,  BALZ WERNER DR ,  KOHL ALBERT ,  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：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：GB2306490B

公开(公告)日：1999-11-17

申请号：GB9622782

申请日：1996-11-01

Applicant: BASF MAGNETICS GMBH ,  EMTEC MAGNETICS GMBH

Inventor： WUENSCH THOMAS ,  KRESS RIA ,  LOCH WERNER ,  LEHNER AUGUST ,  KOHL ALBERT ,  SCHNEIDER NORBERT ,  BURKHARDT UWE

IPC: C08K3/08 ,  C08G18/10 ,  C08G18/32 ,  C08G18/38 ,  C08G18/64 ,  C08G18/72 ,  C08K3/22 ,  C08L75/00 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

Abstract: Hydroxyl-containing polyurethanes I are composed essentially of a) a diisocyanate of 6 to 30 carbon atoms (component II), b) a component III comprising alpha ) an aliphatic diol of 2 to 20 carbon atoms or beta ) an aromatic-aliphatic or aromatic-cycloaliphatic diol of 8 to 30 carbon atoms having nonphenolic hydroxyl groups as hydroxyl groups of the diol and c) a polyhydric alcohol having at least 3 hydroxyl groups, 3 to 18 carbon atoms and nonphenolic hydroxyl groups as hydroxyl groups of the alcohol (component IV), the amounts of components II to IV being such that the total number of nonphenolic hydroxyl groups is from 1.1 to 5.0 per isocyanate group of II. The polyurethanes can be used as binders or binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：FR2714911B1

公开(公告)日：1997-05-30

申请号：FR9500188

申请日：1995-01-10

Applicant: BASF MAGNETICS GMBH

Inventor： DR BRODT GREGOR ,  DR LINDNER ALFRED ,  DR BOBRICH MICHAEL ,  SCHNEIDER NORBERT ,  LEHNER AUGUST ,  DR GRAF HERMANN ,  DR KRESS RIA ,  KOHL ALBERT

IPC: C08G18/65 ,  C08F2/38 ,  C08F8/30 ,  C08F8/32 ,  C08G18/10 ,  C08G18/62 ,  C08G18/78 ,  C09D5/23 ,  C09D7/45 ,  C09D17/00 ,  C09D175/04 ,  C09K23/00 ,  C09K23/52 ,  G11B5/70 ,  G11B5/702 ,  C08G18/32 ,  C09D175/00 ,  B01F17/52

Abstract: Polymeric materials (I) are obtainable by reacting 1. a polymer II comprising a) from 80 to almost 100 mol % of a C1-C25-alkyl ester of an alpha , beta -unsaturated carboxylic acid, b) from 0 to 20 mol % of a further monomer, c) tetrahydrofuran hydroperoxide as polymerization initiator and, if required, d) a further polymerization initiator and/or regulator by means of which the majority of the polymer chains of the polymer II are terminated at one of their ends by a hydroxyl group, 2. with a polyfunctional isocyanate III to give a reaction product IV, the amount of isocyanate groups being from 1.2 to 3.0 mol per mol of hydroxyl groups of II, and 3. reacting IV with ammonia or with a compound V which has an amino function reactive toward isocyanates. The polymeric materials can be used as dispersing resins for pigment-containing coatings, in particular for the production of magnetic recording materials.