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公开(公告)号：JP2001351221A
公开(公告)日：2001-12-21
申请号：JP2001108293
申请日：2001-04-06
Applicant: EMTEC MAGNETICS GMBH
Inventor： JAKUSCH HELMUT DR , KOHL ALBERT , HEILMANN PETER DR , VEITCH RONALD JOHN , KRESS RIA , MUELLER STEFAN , SANDROCK JOHANNES , HEENE HARTMUT
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which uses pigment in the lower side layer, which is markedly characterized in that it is every finely pulverized, more economical than the conventional pigment in the lower side layer and magnetically soft. SOLUTION: A multilayered magnetic recording medium, suitable for high recording density and digital recording, having superior electromagnetic recording characteristics and improved surface smoothness and capable of sufficiently absorbing a large quantity of lubricant in the lower side layer, is provided with an upper-side magnetic recording layer, having less than 0.5 μm layer thickness and at least one layer of lower side layer which includes the magnetically soft pigment.
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2.发明专利
公开(公告)号：JPH11166031A
公开(公告)日：1999-06-22
申请号：JP22834598
申请日：1998-08-12
Applicant: EMTEC MAGNETICS GMBH
Inventor： WEINGART FRANZ , HACKL CHRISTA , KRECH RUEDIGER , BAUER STEPHAN , KOHL ALBERT , KRESS RIA , SCHELBLE JOSEF , BOHRMANN HANS-GUENTHER
Abstract: PROBLEM TO BE SOLVED: To obtain a thermoplastic polyurethane containing no isocyanate group, useful as a binder having improved dispersion characteristics for a mag netic recording medium having excellent magnetic characteristics, by subjecting a specific constituent component to melt polymerization and specifying a molecu lar weight, etc. SOLUTION: Constituent components comprising (A) a 1 mol of a polyol having 400-4,000 molecular weigh, (B) 0.3-9 mol of a mixture of (i) optionally a 2-18C diol and (ii) 0.03-0.4 mol of a diol containing one or more acidic groups, (C) 0-1 mol of a 3-18C polyol containing three or more OH groups, (D) 1.25-13 mols of a 6-30C diisocyanate and (E) 0-1 mol of a 2-16C primary or secondary amino-alcohol are subjected to melt polymerization so as to make the molar ratio of OH group and NH group in the components A, B, C and E to NCO group in the component D of 0.98-1.4 to give the objective polyurethane containing an acidic group, soluble in tetrahydrofuran and having 15,000-70,000 molecular weight.
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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.
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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.
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公开(公告)号：JPH10175266A
公开(公告)日：1998-06-30
申请号：JP20641697
申请日：1997-07-31
Applicant: EMTEC MAGNETICS GMBH
Inventor： KOHL ALBERT , SCHNEIDER NORBERT , ROEMER KARL-HEINZ , RICHTER JUERGEN DR , HEILMANN PETER DR , HITZFELD MICHAEL DR
IPC: B32B7/02 , B41M5/382 , B41M5/392 , B41M5/395 , B41M5/44 , C08L23/06 , G11B5/73 , G11B5/733 , G11B5/74 , H01F1/11
Abstract: PROBLEM TO BE SOLVED: To obtain high wear-resistant properties and magnetic properties by providing a layer containing respectively specific rates of a polymer with a specific melt point or a softening temperature and a polymer with a specific minimum melt point or a specific minimum softening temperature, and also providing another layer containing another polymer on a base. SOLUTION: A base II and a layer III containing 75-90wt.% of a polymer IV with a melt point or a softening temperature of 100-160 deg.C and 10-25wt.% of a polymer V with a melt point or a softening temperature of minimum 90 deg.C are provided on a medium I. In addition, another layer VI containing polymer VII is provided. A monomer accounting for the most part of the polymer IV is an olefinic unsaturated hydrocarbon and the polymer V is polyurethane polyacrylate, polymethcrylate, polyacrylamide or vinyl polymer. The content of the polymer VII is upto 100wt.% for the layer VI and the polymer VII is polyacrylate, polymethacrylate, polyacrylamide or vinyl polymer.
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Patent Agency Ranking
公开(公告)号：JP2003115105A
公开(公告)日：2003-04-18
申请号：JP2002209345
申请日：2002-07-18
Applicant: EMTEC MAGNETICS GMBH
Inventor： MUELLER STEFAN , SANDROCK JOHANNES , STURM ANDREA , GOEDE WOLFGANG , KOHL ALBERT , RAETHER BENEDIKT
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium nearly free from friction between the surface of a magnetic layer and a magnetic head. SOLUTION: The magnetic recording medium comprising a substrate, a lower layer and an upper magnetic layer is characterized in that a binder matrix of the upper magnetic layer has at least 50 deg.C glass transition temperature, a binder matrix of the lower layer contains at least one binder having -COO-(R -O)m -R ( wherein, R denotes a hydrocarbon group, R denotes a hydrocarbon group, R denotes an alkylene group and m denotes an integer of 1-4) and at least one compound represented by the formula R -COO-R (wherein R is as defined above and R denotes a hydrocarbon group). The manufacturing method for the magnetic recording medium is also provided.
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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
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.
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公开(公告)号：WO0205293A2
公开(公告)日：2002-01-17
申请号：PCT/EP0107852
申请日：2001-07-09
Applicant: EMTEC MAGNETICS GMBH , KOHL ALBERT , LEHNER AUGUST , HEIL GUENTER , STEININGER HELMUT
Inventor： KOHL ALBERT , LEHNER AUGUST , HEIL GUENTER , STEININGER HELMUT
Abstract: The invention relates to a conductive polymer composition comprising A) graphite and/or at least one graphite compound, B) at least one binding agent and C) at least one polyurethane dispersion resin, in addition to a multilayered electrode material containing one such polymer composition, and also a method for producing said electrode material and the use thereof.
Abstract translation: 本发明涉及一种包含A）石墨和/或至少一种石墨化合物，B）至少一种粘合剂，和C）的导电性聚合物组合物的至少一种Polyurethandispergierharz以及包括这样的聚合物组合物的多层电极材料，用于制造电极材料的方法以及它们的使用 ，
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公开(公告)号：JP2001357512A
公开(公告)日：2001-12-26
申请号：JP2001108310
申请日：2001-04-06
Applicant: EMTEC MAGNETICS GMBH
Inventor： VEITCH RONALD JOHN , JAKUSCH HELMUT DR , KOHL ALBERT , HEILMANN PETER DR , KRESS RIA , ILMER ANDREAS DR , MUELLER STEFAN , SANDROCK JOHANNES
IPC: B42D15/10 , G11B5/62 , G11B5/70 , G11B5/706 , G11B5/708 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/842 , G11B5/845 , G11B5/852 , H01F1/34
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has excellent electromagnetic characteristics in the entire range of the recording wavelength and excellent mechanical characteristics, is suitable for recording of digital data and can be manufactured by a well-known technique and in which the problem of head saturation is not caused. SOLUTION: In the multi layered magnetic recording medium suitable for high recording density and digital recording, having excellent electromagnetic recording characteristics in the entire range of a recording wavelength, excellent mechanical characteristics, improved surface smoothness and flat frequency response, an upper side magnetic recording layer having
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10.发明专利
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.
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