公开(公告)号：JP2001151845A

公开(公告)日：2001-06-05

申请号：JP2000287074

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

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

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

Abstract: PROBLEM TO BE SOLVED: To provide a polymer which gives proper hardness and abrasion durability to magnetic recording media and further gives sufficient recording stability on storage or operation under high temperature, when used for the production of the magnetic recording media. SOLUTION: This thermoplastic block copolymer polyurethane having at least one soft segment A and at least one hard segment B, characterized in that at least one hard segment in the polyurethane has at least one anchor group. Further, the method for producing the polyurethane, the binder produced from the polyurethane, and the molded article are also provided. The method for using the polyurethane to produce the magnetic recording medium is also provided.

公开(公告)号：JP2001335687A

公开(公告)日：2001-12-04

申请号：JP2001032276

申请日：2001-02-08

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEES ULRIKE ,  RAETHER BENEDIKT ,  KOHL ALBERT ,  KRESS RIA ,  BLUM RAINER

IPC: G11B5/706 ,  C08G18/08 ,  C08G18/12 ,  C08G18/32 ,  C08G18/38 ,  C08G18/40 ,  C08L75/04 ,  C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  G11B5/842

Abstract: PROBLEM TO BE SOLVED: To provide a binder composition for magnetic recording media having excellent dispersibility, being as anhydrous as possible, and easy to control the physical properties of the recording media by a specific chemical modification, and to provide such a magnetic recording medium itself. SOLUTION: This binder composition comprises polyurethane and at least one magnetic pigment or magnetizable pigment, where the polyurethane has a structural unit expressed by formula (I) Or, its partial salt or its perfect salt.

公开(公告)号：JP2001316619A

公开(公告)日：2001-11-16

申请号：JP2001032259

申请日：2001-02-08

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEES ULRIKE ,  RAETHER BENEDIKT ,  KOHL ALBERT ,  KRESS RIA ,  BLUM RAINER

IPC: C08K3/00 ,  C08G18/08 ,  C08G18/12 ,  C08G18/38 ,  C08G18/65 ,  C08L75/04 ,  C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  G11B5/842

Abstract: PROBLEM TO BE SOLVED: To provide a binder composition for a magnetic recording medium which is easily produced, has an excellent dispersibility, is anhydrous as highly as possible, and can easily control the physical characteristics of a recording medium by a specific chemical modification and to provide a magnetic recording medium using the same. SOLUTION: This binder composition contains a polyurethane and at least one magnetic or magnetizable pigment provided the polyurethane has structural units represented by formula I.

公开(公告)号：JP2001192612A

公开(公告)日：2001-07-17

申请号：JP2000287112

申请日：2000-09-21

Applicant: EMTEC MAGNETICS GMBH

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

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

Abstract: PROBLEM TO BE SOLVED: To provide a binder-contg. composition capable of giving magnetic recording media having such sufficient hardness and wear resistance as to be preservable and operable even at high temperatures and high humidities, thus favorably usable for producing magnetic recording media. SOLUTION: This binder-contg. composition comprises at least one thermoplastic blocked copolyurethane having at least one soft segment A and at least one hard segment B and at least one kind of inorganic filler; wherein the thermoplastic blocked copolyurethane is such that the at least one hard segment B has a structural moiety shown by the formula I. This binder-contg. composition can be used for producing, in particular magnetic recording media.

公开(公告)号：NO20026009A

公开(公告)日：2003-02-13

申请号：NO20026009

申请日：2002-12-13

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE

IPC: C08F293/00 ,  C08K3/08 ,  C08K3/10 ,  C08L53/00 ,  C08L55/02 ,  C09D5/23 ,  C09D153/00 ,  C09D155/02 ,  G11B5/70 ,  G11B5/702 ,  G11B5/842 ,  C08K3/22

CPC classification number: G11B5/7023 ,  C08F293/005 ,  C08K3/08 ,  C08K3/10 ,  C08L53/00 ,  C08L55/02 ,  C09D153/00 ,  C09D155/02 ,  C08L2666/14 ,  C08L2666/02

公开(公告)号：DE10005647A1

公开(公告)日：2001-08-16

申请号：DE10005647

申请日：2000-02-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEES ULRIKE ,  BLUM RAINER ,  RAETHER BENEDIKT ,  KRESS RIA ,  KOHL ALBERT

IPC: G11B5/706 ,  C08G18/08 ,  C08G18/12 ,  C08G18/32 ,  C08G18/38 ,  C08G18/40 ,  C08L75/04 ,  C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  G11B5/842 ,  C08K3/10

Abstract: A binder composition for a magnetic recording medium comprises at least one polyurethane having a structural unit according to the formula I or a partial or full salt thereof, and a magnetic or magnetizable pigment.

公开(公告)号：AU1501302A

公开(公告)日：2002-04-22

申请号：AU1501302

申请日：2001-10-09

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEES ULRIKE ,  BOHRMANN HANS-GUENTER ,  RAETHER BENEDIKT ,  KRESS RIA ,  KOHL ALBERT

IPC: C08G18/08 ,  C08G18/40 ,  C08G18/50 ,  C08G18/76 ,  C09D5/23 ,  G11B5/702

Abstract: A polyurethane having at least one anionic anchor group L, the anchor group L being covalently bonded to a polyether segment having at least one nitrogen atom in the polyurethane.

公开(公告)号：DE19945401C2

公开(公告)日：2002-02-07

申请号：DE19945401

申请日：1999-09-22

Applicant: EMTEC MAGNETICS GMBH

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

IPC: C08L75/04 ,  C08G18/78 ,  C09D175/04 ,  C09J175/04 ,  G11B5/702 ,  C08G18/79

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：DE10029699A1

公开(公告)日：2001-12-20

申请号：DE10029699

申请日：2000-06-16

Applicant: EMTEC MAGNETICS GMBH

Inventor： RAETHER BENEDIKT ,  HEES ULRIKE

IPC: C08F293/00 ,  C08K3/08 ,  C08K3/10 ,  C08L53/00 ,  C08L55/02 ,  C09D5/23 ,  C09D153/00 ,  C09D155/02 ,  G11B5/70 ,  G11B5/702 ,  G11B5/842 ,  C09D153/02 ,  C08L53/02 ,  B32B15/00 ,  C08F297/00

Abstract: Binding composition contains, at least, a block copolymer (BC), produced by radical polymerization and containing at least two blocks of different monomer composition, and at least one magnetic or magnetizable pigment (P). Independent claims are also included for the following: (a) preparation of the binding composition; and (b) magnetic recording medium containing the new binding composition.

公开(公告)号：DE10340214A1

公开(公告)日：2004-10-21

申请号：DE10340214

申请日：2003-09-01

Applicant: EMTEC MAGNETICS GMBH

Inventor： MUELLER STEFAN ,  HEES ULRIKE

IPC: G11B5/70 ,  G11B5/702 ,  G11B5/738 ,  G11B5/842 ,  G11B5/708

Abstract: A magnetic medium with a film carrier with a lower non-magnetic but polymer binder-containing layer and an upper magnetic layer of a matrix-embedded magnetic pigment is such that the magnetic pigment is embedded at a pigment volume concentration of >=45% in a binder-free oligomer matrix. An independent claim is also included for production of the medium by simultaneously or sequentially applying the lower and upper layers in a wet-wet process, followed by crosslinking, drying and optionally calendering.