公开(公告)号：GB2285807B

公开(公告)日：1998-04-29

申请号：GB9500512

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH ,  EMTEC 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: Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting 1) a polyurethane (II) comprising a) 1 mol of a diol (III) having an average molecular weight of from 400 to 4000, b) from 0.3 to 9 mol of an aliphatic or cycloaliphatic diol (IV) of 2 to 18 carbon atoms, c) from 0.3 to 9 mol of an aromatic diol (V) of 8 to 30 carbon atoms, d) from 0.01 to 1 mol of a trihydric alcohol (VI) of 3 to 18 carbon atoms, e) from 0.001 to 1 mol of a polyhydric alcohol (VII) of 3 to 14 carbon atoms which contains a tertiary amino group and f) an amount of a diisocyanate (VIII) of 6 to 30 carbon atoms such that the molar ratio of the isocyanate groups to the total number of hydroxyl groups in (III) to (VII) is from 1.05:1 to 1.4:1 with 2) a compound (IX) which contains one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups, the amount of (IX) being such that the number of reactive amino groups corresponds to the number of isocyanate groups in the polyurethane (II). The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：FR2714909B1

公开(公告)日：1997-01-31

申请号：FR9500186

申请日：1995-01-10

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 ,  C08G18/32

Abstract: Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting 1) a polyurethane (II) comprising a) 1 mol of a diol (III) having an average molecular weight of from 400 to 4000, b) from 0.3 to 9 mol of an aliphatic or cycloaliphatic diol (IV) of 2 to 18 carbon atoms, c) from 0.3 to 9 mol of an aromatic diol (V) of 8 to 30 carbon atoms, d) from 0.01 to 1 mol of a trihydric alcohol (VI) of 3 to 18 carbon atoms, e) from 0.001 to 1 mol of a polyhydric alcohol (VII) of 3 to 14 carbon atoms which contains a tertiary amino group and f) an amount of a diisocyanate (VIII) of 6 to 30 carbon atoms such that the molar ratio of the isocyanate groups to the total number of hydroxyl groups in (III) to (VII) is from 1.05:1 to 1.4:1 with 2) a compound (IX) which contains one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups, the amount of (IX) being such that the number of reactive amino groups corresponds to the number of isocyanate groups in the polyurethane (II). The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：GB2285985A

公开(公告)日：1995-08-02

申请号：GB9500467

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR ,  LEHNER AUGUST ,  LINDNER ALFRED ,  GRAF HERMANN ,  BOBRICH MICHAEL ,  KRESS RIA ,  SCHNEIDER NORBET ,  KOHL ALBERT ,  LOCH WERNER

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 ,  C08G18/83

Abstract: Polymeric materials (I) are obtainable by reacting (1) a polymer (II) comprising a) from 80 to almost 100 mol% of a C1 - C25-allyl 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 towards isocyanates. The polymeric materials can be used as dispersing resins for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：DE4446383A1

公开(公告)日：1995-07-20

申请号：DE4446383

申请日：1994-12-23

Applicant: BASF MAGNETICS GMBH

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

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 ,  C08G18/30 ,  C08L75/00 ,  B01F17/52 ,  C09D175/00

Abstract: Novel polymer compsns. (I), for use as dispersant resins, are obtd. by reacting a hydroxylated polymer (II) with a polyfunctional isocyanate (III). The amt. of NCO gps. is 1.2-3.0 mol. per mol. of OH gps. of (II). Then the prod. (IV) is reacted with ammonia or a cpd. (V) having an isocyanate-reactive amino function. (II) is obtd. from 80-100 mol.% of a 1-25 C alkyl ester of an alpha , beta -unsatd. carboxylic acid, 0-20 mol.% of a comonomer, tetrahydrofuran hydroperoxide (THFHPO) as polymerisation initiator and opt. another polymerisation initiator and/or regulator, such that most of the chains of (II) are hydroxy-terminated. The process of prepn. of (I) is claimed, as well as (I) per se.

公开(公告)号：DE4445173A1

公开(公告)日：1995-07-13

申请号：DE4445173

申请日：1994-12-17

Applicant: BASF MAGNETICS GMBH

Inventor： BRODT GREGOR DR ,  WUENSCH THOMAS DR ,  LEHNER AUGUST ,  KOHL ALBERT

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

Abstract: Curable binder component (I) with mol. wt. of 25000-150000, useful for pigmented coatings, is prepd. from a polyurethane (II) obtd. by reacting (a) 1 mole diol with a mol. wt. of 400-4000, (b) 0.1-10 mole 2-18 C (cyclo)aliphatic diol, (c) 0.01-10 mole 8-36 C aromatic diol, (d) 0.01-2 mole 3-18C triol and (e) 0.001-8 mole 3-40 C polyol contg. a tert. amino gp. with (f) a 6-34 C diisocyanate, using a molar ratio of NCO gps. in (f) to total OH gps. in (a-e) of (1.05-1.4):1. (I) is prepd. by reacting (II) with a cpd. (III) having OH gp(s). and also NCO-reactive amino gp(s). in such an amt. that the no. of reactive amino gps. in (III) corresponds to the no. of NCO gps. in (II). Also claimed are articles with a coating, esp. a coating contg. a magnetic pigment, and magnetic recording materials contg. (I); and the coating process.

公开(公告)号：DE4227872A1

公开(公告)日：1994-02-24

申请号：DE4227872

申请日：1992-08-22

Applicant: BASF MAGNETICS GMBH

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

IPC: C08K3/08 ,  C08K3/02 ,  C09D5/23 ,  G11B5/708 ,  G11B5/702

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.

公开(公告)号：FR2740776B1

公开(公告)日：1998-08-28

申请号：FR9613318

申请日：1996-10-31

Applicant: BASF MAGNETICS GMBH

Inventor： WUNSCH THOMAS ,  KRESS RIA ,  LOCH WERNER ,  LEHNER AUGUST ,  KOHL ALBERT ,  SCHNEIDER NORBERT ,  BURKHART 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 ,  C09D7/00 ,  G11B5/62

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：GB2286192B

公开(公告)日：1998-04-29

申请号：GB9500515

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH ,  EMTEC MAGNETICS GMBH

Inventor： BRODT GREGOR ,  WUENSCH THOMAS ,  LEHNER AUGUST ,  KOHL ALBERT

IPC: C08G18/12 ,  C08G18/65 ,  C09D5/23 ,  G11B5/702 ,  C08G18/66

Abstract: A material suitable as crosslinking binder component for pigment-containing coatings and having an average molecular weight of from 25,000 to 150,000, obtainable by reacting a polyurethane comprising a diol having a molecular weight between 400 and 4,000, an aliphatic or cycloaliphatic diol of 2-18 carbon atoms, an aromatic diol of 8-36 carbon atoms, a trihydric or polyhydric alcohol of 3-18 carbon atoms, a polyhydric alcohol of 3-40 carbon atoms containing a tertiary amino group, and a diisocyanate of 3-34 carbon atoms with a compound containing one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups. The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

公开(公告)号：GB2285985B

公开(公告)日：1998-04-29

申请号：GB9500467

申请日：1995-01-11

Applicant: BASF MAGNETICS GMBH ,  EMTEC MAGNETICS GMBH

Inventor： BRODT GREGOR ,  LEHNER AUGUST ,  LINDNER ALFRED ,  GRAF HERMANN ,  BOBRICH MICHAEL ,  KRESS RIA ,  SCHNEIDER NORBET ,  KOHL ALBERT ,  LOCH WERNER

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 ,  C08G18/83

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.

公开(公告)号：FR2710773B1

公开(公告)日：1997-10-31

申请号：FR9411515

申请日：1994-09-27

Applicant: BASF MAGNETICS GMBH

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

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

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.