公开(公告)号：NO20004713L

公开(公告)日：2001-03-23

申请号：NO20004713

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE ,  KRESS RIA ,  KOHL ALBERT ,  BRADSHAW RICHARD ,  CHELBLE JOSEF

IPC: C08G18/40 ,  C08G18/00 ,  C08G18/08 ,  C08G18/42 ,  G11B5/702 ,  G11B5/84 ,  C08G63/685 ,  C08G18/10 ,  C09J175/06

Abstract: Thermoplastic polyurethane (TPU) block copolymers with soft segment(s) (A) and hard segment(s) (B), in which at least one hard segment B contains anionic, cationic or non-ionic anchor group(s) (L) or a mixture of two such groups. Independent claims are also included for the following: (a) binders containing TPU as described above; (b) magnetic dispersions containing a binder as in (a) and magnetic or magnetisable material(s); (c) a process for the production of TPU by reacting at least difunctional, NCO-terminated, linear or branched polyurethane prepolymer(s) (as hard segment) with linear or branched soft segment(s) containing functional groups which are reactive towards isocyanate groups; and (d) magnetic recording media containing binders as in (a).

公开(公告)号：NO20004713A

公开(公告)日：2001-03-23

申请号：NO20004713

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE ,  KRESS RIA ,  KOHL ALBERT ,  BRADSHAW RICHARD ,  CHELBLE JOSEF

IPC: C08G18/40 ,  C08G18/00 ,  C08G18/08 ,  C08G18/42 ,  G11B5/702 ,  G11B5/84 ,  C08G63/685 ,  C08G18/10 ,  C09J175/06

CPC classification number: G11B5/7021 ,  C08G18/0828 ,  C08G18/4205

公开(公告)号：NO20004713D0

公开(公告)日：2000-09-21

申请号：NO20004713

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE ,  KRESS RIA ,  KOHL ALBERT ,  BRADSHAW RICHARD ,  CHELBLE JOSEF

IPC: C08G18/40 ,  C08G18/00 ,  C08G18/08 ,  C08G18/42 ,  G11B5/702 ,  G11B5/84 ,  C08G

Abstract: Thermoplastic polyurethane (TPU) block copolymers with soft segment(s) (A) and hard segment(s) (B), in which at least one hard segment B contains anionic, cationic or non-ionic anchor group(s) (L) or a mixture of two such groups. Independent claims are also included for the following: (a) binders containing TPU as described above; (b) magnetic dispersions containing a binder as in (a) and magnetic or magnetisable material(s); (c) a process for the production of TPU by reacting at least difunctional, NCO-terminated, linear or branched polyurethane prepolymer(s) (as hard segment) with linear or branched soft segment(s) containing functional groups which are reactive towards isocyanate groups; and (d) magnetic recording media containing binders as in (a).

公开(公告)号：BR9607762A

公开(公告)日：1999-11-30

申请号：BR9607762

申请日：1996-03-18

Applicant: EMTEC MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  JAKUSCH HELMUT ,  KOCH VOLKER ,  OHLINGER MANFRED ,  KOHL ALBERT ,  LENZ WERNER ,  SCHNEIDER NORBERT ,  HEILMANN PETER ,  VEITCH RONALD JOHN ,  HOFFMANN ERICH ,  BNER WERNER H ,  JACHOW HARALD ,  LEHNERT RUDI

IPC: B32B27/20 ,  B32B33/00 ,  C01G37/02 ,  G11B5/708 ,  G11B5/73 ,  G11B5/733 ,  G11B5/738 ,  G11B5/78 ,  G11B5/704

Abstract: Tape-like magnetic recording media having a nonmagnetic substrate and at least one layer applied to the substrate having incorporated into at least one of these layers, an inorganic needle-shaped pigment which serves as a supporting pigment and has a ratio of the average length to the average diameter of the pigment of at least 3, and the mean modulus of elasticity of the layers is not less than 15 Gpa in the longitudinal direction of the tape-like recording media.

公开(公告)号：DE59700570D1

公开(公告)日：1999-11-25

申请号：DE59700570

申请日：1997-07-26

Applicant: EMTEC MAGNETICS GMBH

Inventor： KOHL ALBERT ,  SCHNEIDER NORBERT ,  ROEMER KARL-HEINZ ,  RICHTER JUERGEN ,  HEILMANN PETER ,  HITZFELD MICHAEL

IPC: B32B7/02 ,  B41M5/382 ,  B41M5/392 ,  B41M5/395 ,  B41M5/44 ,  C08L23/06 ,  G11B5/73 ,  G11B5/733 ,  G11B5/74 ,  H01F1/11 ,  B41M5/38

Abstract: Media (I) suitable for thermal transfer, containing (a) a base layer (II), (b) a layer (III) containing (1) 75-90 wt% polymer (IV) with a m.pt. or softening pt. (s.pt.) of 100-160 degrees C and (2) 10-25 wt% polymer (V) with a melting point or softening point of at least 90 degrees C, and (c) a layer (VI) containing a polymer (VII). Also claimed are (i) media (XI) made up of layers, obtained by reacting a medium (I) with a substrate (XII) by bringing the two into contact so that layers (III) and (VI) are between layer (II) and substrate (XII); (ii) a process for the production of media (XI) by contacting (I) with (XII) as above at 80-180 degrees C.

公开(公告)号：AU2273699A

公开(公告)日：1999-07-19

申请号：AU2273699

申请日：1998-12-16

Applicant: EMTEC MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  KOHL ALBERT ,  KRESS RIA ,  WUNSCH THOMAS ,  WEINGART FRANZ

IPC: C09D5/23 ,  C09D175/04 ,  G11B5/702

Abstract: The present invention relates to a magnetic recording medium, comprising a non-magnetic support and at least one magnetic coating applied thereto, whereby said coating contains at least one finely distributed magnetic material dispersed in a binding agent. Said binding agent contains at least one polyurethane resin (PV, which can be obtained by cross-linking at least one polyisocyanate (A) with at least one polyurethane prepolymer (B) which is free of isocyanate groups and contains at least 3 active hydrogen atoms. The invention is characterised in that the polyurethane prepolymer (B) has at least two hydroxyl groups and at least one primary and/or secondary amino group. The invention also relates to a method for producing a magnetic recording medium, polyurethane prepolymers B) which are free of isocyanate and a method for the production and use thereof.

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：DE10135957A1

公开(公告)日：2003-02-13

申请号：DE10135957

申请日：2001-07-24

Applicant: EMTEC MAGNETICS GMBH

Inventor： MUELLER STEFAN ,  SANDROCK JOHANNES ,  STURM ANDREA ,  GOEDE WOLFGANG ,  KOHL ALBERT ,  RAETHER BENEDIKT

IPC: G11B5/702 ,  G11B5/62 ,  G11B5/706 ,  G11B5/708 ,  G11B5/71 ,  G11B5/738 ,  G11B5/84 ,  G11B5/68

Abstract: A magnetic recording medium has on a support: (A) a lower layer containing a binder and an inorganic pigment (P1); and (B) an upper layer containing a binder and a magnetic pigment (P2), as well as a non-magnetic pigment (P3). A magnetic recording medium has on a support: (A) a lower layer containing a binder and an inorganic pigment (P1); (B) an upper layer containing a binder and a magnetic pigment (P2); and (C) a non-magnetic pigment (P3). The recording medium is such that: (i) binder (B) has Tg ≥ 50 degrees C and binder (A) a Tg below 50 degrees C; (ii) pigment (P3) has a particle size at least corresponding to the layer (B) dry thickness; and (iii) the layer (B) contains an alkoxylated fatty ester compound of formula R -COO-(R -O)m-R (I) as well as a fatty ester of formula R -COO-R (III): R = optionally unsaturated 11-22C hydrocarbyl group; R = optionally unsaturated 1-6C hydrocarbyl group; R = 1-4C alkylene; m = 1-4; and R = optionally unsaturated 4-8C hydrocarbyl group.

公开(公告)号：DE59803043D1

公开(公告)日：2002-03-21

申请号：DE59803043

申请日：1998-12-16

Applicant: EMTEC MAGNETICS GMBH

Inventor： LEHNER AUGUST ,  KOHL ALBERT ,  KRESS RIA ,  WUENSCH THOMAS ,  WEINGART FRANZ

IPC: C09D5/23 ,  C09D175/04 ,  G11B5/702

Abstract: The present invention relates to a magnetic recording medium, comprising a non-magnetic support and at least one magnetic coating applied thereto, whereby said coating contains at least one finely distributed magnetic material dispersed in a binding agent. Said binding agent contains at least one polyurethane resin (PV, which can be obtained by cross-linking at least one polyisocyanate (A) with at least one polyurethane prepolymer (B) which is free of isocyanate groups and contains at least 3 active hydrogen atoms. The invention is characterised in that the polyurethane prepolymer (B) has at least two hydroxyl groups and at least one primary and/or secondary amino group. The invention also relates to a method for producing a magnetic recording medium, polyurethane prepolymers B) which are free of isocyanate and a method for the production and use thereof.