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公开(公告)号：WO1995034889A1
公开(公告)日：1995-12-21
申请号：PCT/US1995004403
申请日：1995-04-11
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY , BERG, Allvin, M. , BEZENEK, Benedict, L. , BOHLSEN, Thomas, M. , CARLSON, James, G. , CHANG, Daniel, Y. , HARVEY, John, C. , JOHNSON, Stephen, A. , KUCK, Kevin, K. , MCCOLLAM, Robert, P.
IPC: G11B05/702
CPC classification number: G11B5/68 , C08G18/0814 , C08G18/0823 , C08G18/0833 , C08G18/284 , C08G18/2875 , C08G18/4277 , C08G18/44 , C08G18/6245 , G11B5/7022 , G11B5/7027 , G11B5/735 , Y10S428/90 , Y10T428/24355 , Y10T428/24372 , Y10T428/24405
Abstract: Disclosed is a video tape suitable for use in high speed contact duplication. The magnetic layer comprises a magnetic pigment dispersed in a polymeric binder at amounts of magnetic pigment between 75 and 88 percent by weight of the magnetic layer with a total pigment loading (magnetic + nonmagnetic pigments) of at least 80 percent by weight. The tape is provided with a backside coating comprising at least two nonmagnetic pigments dispersed in a polymeric binder, the first nonmagnetic pigment, being a conductive material and having a relatively small particle size of between about 0.015 and 0.15 mu m, and the second nonmagnetic pigment having a relatively large particle size of between about 0.15 and 1.5 mu m. The magnetic layer has a lubricant absorption value of at least 4 and a surface roughness of between 5 and 15 nm. The backside coating has a surface roughness of between 10 and 150 nm. The polymeric binder of either or both of the magnetic layer and the backside coating may preferably comprise a hard component resin and a soft component resin, wherein the soft component resin is a polyurethane having a plurality of pendant carboxy groups.
Abstract translation: 公开了适用于高速接触复制的录像带。 磁性层包含分散在聚合物粘合剂中的磁性颜料，其磁性颜料的量为磁性层的75至88重量％，总颜料负载（磁性+非磁性颜料）为至少80重量％。 所述带设置有背面涂层，所述背面涂层包含分散在聚合物粘合剂中的至少两种非磁性颜料，所述第一非磁性颜料是导电材料，并且具有在约0.015至0.15μm之间的相对较小的粒度和所述第二非磁性颜料 具有约0.15至1.5μm之间的相对较大的粒度。 磁性层的润滑剂吸收值为4以上，表面粗糙度为5〜15nm。 背面涂层具有10至150nm的表面粗糙度。 磁性层和背面涂层中的任一种或两者的聚合物粘合剂可以优选包含硬组分树脂和软组分树脂，其中软组分树脂是具有多个侧羧基的聚氨酯。
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公开(公告)号：WO1994028544A1
公开(公告)日：1994-12-08
申请号：PCT/JP1994000820
申请日：1994-05-23
Applicant: TDK CORPORATION
Inventor： TDK CORPORATION , ABE, Shinji , NAKASHIMA, Yutaka , HORIGOME, Eiji , YAHATA, Toshikazu
IPC: G11B05/702
CPC classification number: G11B5/7021 , Y10S428/90 , Y10T428/31609
Abstract: A magnetic recording medium comprising a nonmagnetic supporting layer and, formed thereon, a magnetic layer comprising a ferromagnetic powder dispersed in a binder. The binder is composed of 30-70 wt.% of a polyurethane resin A having a glass transition temperature (Tg) satisfying the condition: 60 DEG C
Abstract translation: 一种磁记录介质，包括非磁性支撑层，并在其上形成包含分散在粘合剂中的铁磁性粉末的磁性层。 粘合剂由30-70重量％的玻璃化转变温度（Tg）满足条件为：60℃，Tg <80℃的聚氨酯树脂A和具有玻璃化转变温度的另一个聚氨酯树脂B 温度（Tg）满足条件：0℃
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13.发明公开
公开(公告)号：EP0217410A3
公开(公告)日：1988-07-06
申请号：EP86113682
申请日：1986-10-03
Applicant: UNION CARBIDE CORPORATION
Inventor： Colon, Ismael , Mallon, Charles Bernard , Johnson, Robert Norman
IPC: G11B05/702 , G11B05/70
CPC classification number: G11B5/7023 , C08F8/40 , G11B5/7013 , G11B5/702 , G11B5/7022 , C08F20/00
Abstract: Novel phosphorylated compositions of a vinyl chloride copolymer or terpolymer, a phenoxy resin, a hydroxyalkyl acrylate or methacrylate-lactone adduct or a reaction product of a normally solid pendant-hydroxyl-containing thermoplastic polymer having at least 8 hydroxyl groups per molecular chain and an adduct which is the product of either a hydroxyalkyl acrylate or methacrylate or a lactone-acrylate adduct and an organic diisocyanate having improved dispersion characteristics suitable for use in applications such as magnetic recording media.
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公开(公告)号：EP0195228A3
公开(公告)日：1988-01-07
申请号：EP86101604
申请日：1986-02-07
Applicant: International Business Machines Corporation
Inventor： Piltingsrud, Douglas Howard , Chen Shyan Shen, John
IPC: G11B05/702
CPC classification number: G11B5/7021 , C08G18/302 , G11B5/7028 , Y10S428/90 , Y10T428/249978 , Y10T428/24998 , Y10T428/249982 , Y10T428/249985 , Y10T428/257 , Y10T428/31569
Abstract: The composition and method of making a magnetic recording media using a polyurethane binder system with high lubricant retention and a high concentration of magnetic particles is described. The use of hydrated alumina with a solvent blocked isocyanate is used to produce an open cell microporosity in the cured coating wherein the individual voids are not greater than the magnetic bit cell size and the alumina particles remain in the coating to improve abrasion resistance. The porosity size is controlled by a surface active agent additive. Also shown is the method of preparing hydrated alumina with small particle size, dispersibility, and compatibility, and wherein temperature whereby the C0 2 formation that creates the porosity occurs as the polyurethane components cure.
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15.发明公开Magnetic recording medium having a perfluoropolyether polymer protective coating 失效具有全氟聚醚聚合物保护涂层的磁记录介质
公开(公告)号：EP0140582A3
公开(公告)日：1987-06-03
申请号：EP84306593
申请日：1984-09-27
Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY
Inventor： Burguette, Mario Dominguez Minnesota Mining and , Foss, George Delman c/o Minnesota Mining and
IPC: G11B05/702 , C09D03/49
CPC classification number: G11B5/725 , C08F299/024 , C09D171/02 , Y10S428/90 , Y10T428/265 , Y10T428/31536 , Y10T428/3154 , Y10T428/31544
Abstract: A magnetic recording medium protected by a very thin, composite low surface energy covering is disclosed. The covering comprises a primer layer of a polymerized phosphorylated monomer or oligomer and an outer lubricant layer of perfluoropolyether polymer. The two layers may be polymerized in situ. The primer layer is made from monomers such as phosphorylated bis[4-(methacryloyloxy- hydroxypropylcarbamato)-cyclohexyl]methane. The outer layer is made from a polymerizable perfluoropolyether monomer such as
CH=CH 2 . The composite low surface energy covering is especially useful for providing lubricity and corrosion resistance to a metallic thin-film magnetic recording coating.-
Patent Agency Ranking
公开(公告)号：EP0142798A3
公开(公告)日：1986-04-30
申请号：EP84113556
申请日：1984-11-09
Applicant: BASF Aktiengesellschaft
Inventor： Lehner, August , Kopke, Helmut , Roller, Hermann , Balz, Werner, Dr. , Grau, Werner, Dr. , Koester, Eberhard, Dr. , Sommermann, Friedrich, Dr.
IPC: G11B05/702
CPC classification number: G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935 , Y10T428/31942
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公开(公告)号：EP0173213A3
公开(公告)日：1988-07-27
申请号：EP85110366
申请日：1985-08-19
Applicant: BASF Aktiengesellschaft
Inventor： Roller, Hermann , Hack, Joachim , Woweries, Uwe , Lehner, August , Grau, Werner, Dr. , Nagel, Peter , Falk, Roland, Dr.
IPC: G11B05/702
CPC classification number: G11B5/7021 , Y10S428/90 , Y10T428/31609
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公开(公告)号：EP0169524A3
公开(公告)日：1987-05-27
申请号：EP85109123
申请日：1985-07-22
Applicant: BASF Aktiengesellschaft
Inventor： Lehner, August , Heil, Guenter, Dr. , Kovacs, Jenoe, Dr. , Balz, Werner, Dr. , Lenz, Werner, Dr.
IPC: G11B05/702
CPC classification number: G11B5/702 , Y10S428/90 , Y10T428/31609
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公开(公告)号：EP0172501A3
公开(公告)日：1987-04-29
申请号：EP85109987
申请日：1985-08-08
Applicant: UNION CARBIDE CORPORATION
Inventor： Colon, Ismael
CPC classification number: G11B5/7021 , C08G18/4879 , C08G18/6212 , C08G18/6407 , C08G18/6725 , C08G18/8175 , Y10S428/90 , Y10T428/31511 , Y10T428/31551 , Y10T428/31609 , Y10T428/31935 , C08G18/48 , C08G18/62
Abstract: Flexible, self-crosslinking binders, useful for magnetic media composites are prepared from hydroxyl-containing thermoplastic polymers reacted with condensates of diisocyanates and unsaturated esters. They can be cured with an electron beam.
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公开(公告)号：EP0139403A3
公开(公告)日：1986-12-17
申请号：EP84305795
申请日：1984-08-24
Applicant: International Business Machines Corporation
Inventor： Economy, James , Zachariades, Anagnostis Efsatathios
IPC: G11B05/84 , G11B05/842 , G11B05/718 , G11B05/708 , G11B05/702
Abstract: A method for improving the durability, surface finish, and magnetic properties of a magnetic recording disk, the recording disk having a magnetic coating material with load bearing particles therein, by applying thereto a deformational force which exceeds the elastic limit of the coating material.
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