公开(公告)号：NO20004714L

公开(公告)日：2001-03-23

申请号：NO20004714

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE ,  KRESS RIA ,  KOHL ALBERT ,  BRADSHAW RICHARD ,  MAIER GERHARD

IPC: C08L75/04 ,  C08G18/78 ,  C09D175/04 ,  C09J175/04 ,  G11B5/702

Abstract: Binder compositions containing inorganic fillers and thermoplastic polyurethane block copolymers with soft and hard segments, in which at least one hard segment contains a bicyclic structural element formed by the criss-cross polyaddition reaction between a di-isocyanate and an azine compound. A binder composition (BC) containing (at least) (i) an inorganic filler and (ii) thermoplastic polyurethane block copolymer(s) (TPU) with soft segment(s) (A) and hard segment(s) (B), in which at least one of the hard segments contains a structural element of formula (I): R , R = optionally substituted 4-20C aromatic or heteroaromatic groups, with R = R = H, or R -R = essentially completely fluorinated 1-10C alkyl; R , R = linear or branched aliphatic residues, cycloaliphatic residues or aromatic residues (all with 4-20C, all optionally substituted); n = 1-100 . An Independent claim is also included for a method for the production of BC by mixing components (i) and (ii) together.

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：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：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.