公开(公告)号：US20180018994A1

公开(公告)日：2018-01-18

申请号：US15719318

申请日：2017-09-28

申请人： International Business Machines Corporation

发明人： Dylan J. Boday ,  Diana J. Hellman ,  Icko E.T. Iben ,  Mark A. Lantz

IPC分类号： G11B5/702

CPC分类号： G11B5/7023

摘要： According to one embodiment, a magnetic recording medium includes: a substrate; an underlayer positioned above the substrate; a magnetic recording layer positioned above the underlayer; and a plurality of conductive polymers dispersed within the substrate, the underlayer, the magnetic recording layer, the substrate and the underlayer, the substrate and the magnetic recording layer, the underlayer and the magnetic recording layer, or the underlayer, the magnetic recording layer, and the substrate. In addition, the conductive polymers are dispersed such that a concentration of the conductive polymers has a gradient in a single one of the layers in a thickness direction.

公开(公告)号：US20150248908A1

公开(公告)日：2015-09-03

申请号：US14698913

申请日：2015-04-29

申请人： FUJIFILM Corporation

发明人： Yohei ARITOSHI ,  Kazufumi OMURA

IPC分类号： G11B5/70 ,  G11B5/73 ,  G11B5/733 ,  G11B5/702

CPC分类号： G11B5/7013 ,  G11B5/7021 ,  G11B5/7022 ,  G11B5/7023 ,  G11B5/73 ,  G11B5/7305 ,  G11B5/733

摘要： An aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the magnetic layer and/or nonmagnetic layer comprises organic acid A and organic acid B below, with an acid strength pKa(A) of organic acid A and an acid strength pKa(B) of organic acid B satisfying a relation of pKa(A)

摘要翻译： 本发明的一个方面涉及一种在非磁性载体上依次包含非磁性粉末和粘合剂的非磁性层和包含铁磁性粉末和粘合剂的磁性层的磁性记录介质，其中磁性层和/或非磁性材料 层A包含有机酸A和有机酸B，具有酸性强度pKa（A）的有机酸A和有机酸B的酸度pKa（B）满足pKa（A）

公开(公告)号：US08603652B2

公开(公告)日：2013-12-10

申请号：US13043692

申请日：2011-03-09

申请人： Tadashi Ishiguro ,  Katsumi Araki ,  Kenichi Nakamura

发明人： Tadashi Ishiguro ,  Katsumi Araki ,  Kenichi Nakamura

IPC分类号： G11B5/716

CPC分类号： G11B5/7023 ,  G11B5/7022 ,  G11B5/7026 ,  G11B5/735 ,  G11B5/738

摘要： An aspect of the present invention relates to a magnetic recording medium comprising on one surface of a nonmagnetic support a nonmagnetic layer containing a nonmagnetic powder and a binder and a magnetic layer containing a ferromagnetic powder and a binder in this order, as well as comprising a backcoat layer on the other surface of the nonmagnetic support. The nonmagnetic layer is a radiation-cured layer formed by curing with radiation a given radiation-curable composition, and the backcoat layer comprises filler particles with an average primary particle diameter, D50, ranging from 0.05 to 1.0 μm, the filler particles being selected from the group consisting of organic polymer particles and inorganic colloidal particles.

摘要翻译： 本发明的一个方面涉及一种在非磁性载体的一个表面上包含非磁性粉末和粘合剂的非磁性层和含有铁磁性粉末和粘合剂的磁性层的磁性记录介质，并且包括一个 背涂层在非磁性载体的另一个表面上。 非磁性层是通过用给定的可辐射固化组合物的辐射固化而形成的辐射固化层，背涂层包含平均初级粒径D50为0.05至1.0μm的填料颗粒，填料颗粒选自 由有机聚合物颗粒和无机胶体颗粒组成的组。

公开(公告)号：US20110244270A1

公开(公告)日：2011-10-06

申请号：US13077337

申请日：2011-03-31

申请人： Masataka YOSHIZAWA ,  Ayako MATSUMOTO ,  Satoshi MATSUBAGUCHI

发明人： Masataka YOSHIZAWA ,  Ayako MATSUMOTO ,  Satoshi MATSUBAGUCHI

IPC分类号： G11B5/702 ,  C08F220/06 ,  G11B5/714

CPC分类号： G11B5/7023 ,  C08F220/28 ,  C08F220/58 ,  C08F226/10 ,  C08F2220/1891 ,  G11B5/70678 ,  G11B5/714

摘要： An aspect of the present invention relates to a binder composition for a magnetic recording medium, which comprises a vinyl copolymer comprising a structural unit denoted by general formula [1]: wherein, in general formula [1], R1 denotes a hydrogen atom, a halogen atom, or a methyl group, L1 denotes a single bond or a divalent linking group, and Y an alicyclic group; a structural unit denoted by general formula [2]: wherein, in general formula [2], R2 denotes a hydrogen atom, a halogen atom, or a methyl group, L2 denotes a single bond or a divalent linking group, and Z denotes a hydrocarbon group with a carbon number ranging from 8 to 50; and a structural unit denoted by general formula [3]: wherein, in general formula [3], R3 denotes a hydrogen atom, a halogen atom, or a methyl group, and L3 denotes a single bond or a divalent linking group.

摘要翻译： 本发明的一个方面涉及一种用于磁记录介质的粘合剂组合物，其包含由通式[1]表示的结构单元的乙烯基共聚物：其中，通式[1]中，R 1表示氢原子， 卤原子或甲基，L1表示单键或二价连接基，Y表示脂环族基; 由通式[2]表示的结构单元：其中，通式[2]中，R 2表示氢原子，卤素原子或甲基，L 2表示单键或二价连接基，Z表示 碳数为8至50的烃基; 和由通式[3]表示的结构单元：其中，通式[3]中，R3表示氢原子，卤素原子或甲基，L3表示单键或二价连接基团。

公开(公告)号：US20050181241A1

公开(公告)日：2005-08-18

申请号：US11089067

申请日：2005-03-24

申请人： Bruce Edwards

发明人： Bruce Edwards

IPC分类号： G11B5/70 ,  G11B5/702 ,  G11B5/714 ,  G11B5/17

CPC分类号： G11B5/70 ,  G11B5/7021 ,  G11B5/7023 ,  G11B5/714 ,  G11B5/735 ,  G11B5/738 ,  Y10T428/25 ,  Y10T428/257

摘要： A dual-layer magnetic recording medium including a non-magnetic substrate having a front side and a back side, a lower support layer formed over the front side and a magnetic upper recording layer formed over the lower layer, wherein the magnetic layer contains a volume concentration of at least about 35% of a magnetic metallic particulate pigment having a coercivity of at least about 2000 Oersteds (Oe), and a binder system for the pigment. The magnetic recording medium exhibits an orientation ratio greater than 2.0, a pulsewidth (PW50) value of less than about 500 nm, and a remanence-thickness product, Mr*t, of less than about 5.0 memu/cm2.

公开(公告)号：US06896959B2

公开(公告)日：2005-05-24

申请号：US10441419

申请日：2003-05-19

申请人： Bruce H. Edwards

发明人： Bruce H. Edwards

IPC分类号： G11B5/70 ,  G11B5/702 ,  G11B5/714 ,  G11B5/706

CPC分类号： G11B5/70 ,  G11B5/7021 ,  G11B5/7023 ,  G11B5/714 ,  G11B5/735 ,  G11B5/738 ,  Y10T428/25 ,  Y10T428/257

摘要： A dual-layer magnetic recording medium including a non-magnetic substrate having a front side and a back side, a lower support layer formed over the front side and a magnetic upper recording layer formed over the lower layer, wherein the magnetic layer contains a volume concentration of at least about 35% of a magnetic metallic particulate pigment having a coercivity of at least about 2000 Oersteds (Oe), and a binder system for the pigment. The magnetic recording medium exhibits an orientation ratio greater than 2.0, a pulsewidth (PW50) value of less than about 500 nm, and a remanence-thickness product, Mr*t, of less than about 5.0 memu/cm2.

摘要翻译： 一种双层磁记录介质，包括具有前侧和后侧的非磁性基板，在前侧形成的下支撑层和形成在下层上的磁上记录层，其中磁层包含体积 浓度至少约35％的具有至少约2000奥斯特（Oe）的矫顽力的磁性金属颗粒颜料和用于颜料的粘合剂体系。 磁记录介质的取向比大于2.0，脉冲宽度（PW50）值小于约500nm，剩磁厚度乘积Mr * t小于约5.0 memu / cm 2， SUP>。

公开(公告)号：US20040234817A1

公开(公告)日：2004-11-25

申请号：US10441419

申请日：2003-05-19

申请人： Imation Corp.

发明人： Bruce H. Edwards

IPC分类号： B32B005/16

CPC分类号： G11B5/70 ,  G11B5/7021 ,  G11B5/7023 ,  G11B5/714 ,  G11B5/735 ,  G11B5/738 ,  Y10T428/25 ,  Y10T428/257

摘要： A dual-layer magnetic recording medium including a non-magnetic substrate having a front side and a back side, a lower support layer formed over the front side and a magnetic upper recording layer formed over the lower layer, wherein the magnetic layer contains a volume concentration of at least about 35% of a magnetic metallic particulate pigment having a coercivity of at least about 2000 Oersteds (Oe), and a binder system for the pigment. The magnetic recording medium exhibits an orientation ratio greater than 2.0, a pulsewidth (PW50) value of less than about 500 nm, and a remanence-thickness product, Mr*t, of less than about 5.0 memu/cm2.

摘要翻译： 一种双层磁记录介质，包括具有前侧和后侧的非磁性基板，在前侧形成的下支撑层和形成在下层上的磁上记录层，其中磁层包含体积 浓度至少约35％的具有至少约2000奥斯特（Oe）的矫顽力的磁性金属颗粒颜料和用于颜料的粘合剂体系。 磁记录介质的取向比大于2.0，脉冲宽度（PW50）值小于约500nm，剩磁厚度乘积Mr * t小于约5.0 memu / cm 2。

公开(公告)号：US20030118870A1

公开(公告)日：2003-06-26

申请号：US10281947

申请日：2002-10-29

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Hitoshi Noguchi ,  Nobuo Yamazaki ,  Shinji Saito

IPC分类号： B32B009/00

CPC分类号： G11B5/7021 ,  G11B5/7023 ,  G11B5/70678 ,  G11B5/7085 ,  G11B5/714 ,  Y10T428/256 ,  Y10T428/31609

摘要： A magnetic recording medium comprising: a nonmagnetic support; and at least one magnetic layer comprising a ferromagnetic hexagonal ferrite powder and a binder, wherein the magnetic layer comprises diamond particles having an average particle size of 0.03 to 0.5 nullm in a ratio of 0.1 to 5% by weight to the ferromagnetic hexagonal ferrite powder, the ferrite hexagonal ferrite powder has an average tabular diameter of 5 to 40 nm, and the binder is at least one of: (i) a binder comprising from 0.2 to 0.7 meq/g of at least one polar group selected from nullSO3M, nullOSO3M, nullPO(OM)2, nullOPO(OM)2 and nullCOOM, wherein M represents a hydrogen atom, an alkali metal or ammonium, and (ii) a binder comprising from 0.5 to 5 meq/g of at least one polar group selected from nullCONR1R2, nullNR1R2 and nullNnullR1R2R3 wherein R1, R2 and R3 each independently represents a hydrogen atom or an alkyl group.

摘要翻译： 一种磁记录介质，包括：非磁性载体; 以及包含铁磁性六角铁氧体粉末和粘合剂的至少一个磁性层，其中所述磁性层包含平均粒度为0.03-0.5μm，相对于铁磁性六角铁氧体粉末为0.1-5wt％的金刚石颗粒， 所述铁氧体六角铁氧体粉末的平均片状直径为5〜40nm，所述粘合剂为以下中的至少一种：（i）包含0.2〜0.7meq / g的至少一种选自-SO 3 M， OSO3M，-PO（OM）2，-OPO（OM）2和-COOM，其中M表示氢原子，碱金属或铵，和（ii）包含0.5-5meq / g至少一种 选自-CONR1R2，-NR1R2和-N + R1R2R3的极性基团，其中R1，R2和R3各自独立地表示氢原子或烷基。

公开(公告)号：US20020094444A1

公开(公告)日：2002-07-18

申请号：US09485002

申请日：2000-01-31

发明人： KOJI NAKATA ,  MASAHIRO ISHIKAWA ,  KUNIO SHIMIZU ,  TERUMASA DAITO ,  KENJI NISHIMURA ,  TADASHI MURAKAMI

IPC分类号： B32B027/36

CPC分类号： B32B27/08 ,  B32B27/306 ,  B32B27/34 ,  B32B27/36 ,  B32B2307/7163 ,  B32B2367/00 ,  B32B2377/00 ,  B32B2437/02 ,  C05G3/0029 ,  C05G3/0047 ,  C08L67/00 ,  G11B5/7023 ,  Y10T428/31786

摘要： The present invention nullInull relates to a biodegradable polyester resin composition comprising an aliphatic polyester resin, a polycaprolactone, and inorganic additives, in which the ratio of the aliphatic polyester resin with respect to the polycaprolactone is 100 parts by weight/1-200 parts by weight and, the ratio of total amount of the aliphatic polyester resin and the polycaprolactone with respect to the inorganic additives is 95-50% by weight/5-50% by weight. The present invention nullIInull relates to a biodegradable throw-away glove obtained by T-die molding a polyester resin composition in which 1-200 parts by weight of a polycaprolactone is mixed with 100 parts by weight of an aliphatic polyester resin to obtain a film having thickness of 40 nullm, and two layers of the film are doubled up to heat-seal into a glove-shape, and circumferential portions are cut off. The present invention nullIIInull relates to a biodegradable stake molded from a polyester resin composition in which 1-200 parts by weight of a polycaprolactone is mixed with 100 parts by weight of an aliphatic polyester resin, and which may contain fertilizers and/or chemicals at an inside portion thereof. The present invention nullIVnull relates to a protecting material for plants in which there is molded into a net-like shape a polyester resin composition obtained by formulating 1-200 parts by weight of a polycaprolactone and 5-100 parts by weight of talc with 100 parts by weight of an aliphatic polyester resin, and which is wound around a trunk of trees, and prevents an injury eaten by animals. The present invention nullVnull relates to a biodegradable tape which comprises molding a lactone resin alone or a lactone-contained resin composition in which the lactone resin is formulated with other biodegradable resins and/or additives for resins, which is excellent in degradability, moldability, and mechanical properties, and which is employed as a tape for wrapping-packing and a pressure sensitive adhesive tape, etc. The present invention nullVInull relates to a biodegradable card characterized by employing as a base material a biodegradable resin composition layer comprising 85-5% by weight of a polylactic acid-based resin (A), 5-50% by weight of an aliphatic polyester resin (B), and 10-45% by weight of a polycaprolactone-based resin (C) (total of the (A)null(B)null(C) is 100% by weight) and, further 5-300 parts by weight of fillers (D) based on 100 parts by weight of the total of the (A)null(B)null(C). The present invention nullVIInull relates to a biodegradable laminated film obtained by laminating a biodegradable resin layer with papers, etc., and the biodegradable resin layer is composed of an aliphatic polyester resin alone which is a succinic acid-1,4-butanediol polyester, a succinic acid-ethyleneglycol polyester, or a succinic acid/adipic acid-1,4-butanediol copolyester, or composed of the aliphatic polyester resin and the polycaprolactone. The present invention nullVIIInull relates to a biodegradable laminated film in which there are laminated at least two different kinds of biodegradable resin layers, and relates to a biodegradable film for agriculture. The present invention nullIXnull relates to a biodegradable multi-layers film or sheet comprising a layer (A) composed of a biodegradable aliphatic polyester resin composition which contains an aliphatic polyester having not relatively high biodegradability and an aliphatic polyester resin containing a urethane bond, however, which is more excellent in biodegradability than themselves, and a layer (B) composed of a lactone resin alone or a composition of the lactone resin with a biodegradable resin other than the lactone resin, in which the lactone resin is irradiated solely or together with at least one of other constructing components by ionizing radiation. The present invention nullXnull is to a biodegradable thin film having a film thickness of 5-25 nullm, and which comprises a composition of an aliphatic polyester resin having a specified melt flow rate and melt tension with a polycaprolactone. The present invention nullXInull relates a cushion sheet having great many of discontinuous cells, in which there is employed a biodegradable shrink film including a polycaprolactone irradiated by an ionizing radiation. The present invention nullXIInull relates to particle-state products on which there is coated a polycaprolactone irradiated by an ionizing radiation and, particularly, it relates to a coated fertilizer, coated agricultural chemicals, or microcapsule for carbonless copy paper which have a biodegradable thin layer and an excellent storage stability. The present invention nullXIIInull relates to particle-state fertilizers on which there is coated a biodegradable coating layer including a biodegradable polylactone. The present invention nullXIVnull relates to a biodisintegrable resin composition which comprises a lactone resin having a specified composition, an aliphatic polyester resin, a fatty acid amide, and a thermoplastic resin having a high impact strength and, further, optionally, in which there are added a liquid lubricant, finely-powdered silica, and talc.

公开(公告)号：US06037070A

公开(公告)日：2000-03-14

申请号：US883903

申请日：1997-06-27

申请人： Katsuhiko Meguro ,  Hiroshi Hashimoto

发明人： Katsuhiko Meguro ,  Hiroshi Hashimoto

IPC分类号： G11B5/702

CPC分类号： G11B5/7023 ,  G11B5/7021 ,  G11B5/7022 ,  Y10S428/90

摘要： A poor solvent is used for removing low molecular weight components from a binder, which has weight average molecular weight within the range of 10,000 to 60,000, said poor solvent has a solubility parameter being different from solubility parameter of the binder by more than 1.3 and less than 2.3 and is a solvent such as acetonitrile having no active hydrogen, and a difference between solubility parameter of the solvent in the solution after mixing and solubility parameter of the binder is more than 1.0 and less than 2.0, said poor solvent is used for fractional precipitation, and the poor solvent being by 0.5 to 3 times as much as the quantity of the binder solution is added to separate the solution to a liquid phase where low molecular weight components are dissolved more and a liquid layer where high molecular weight components are dissolved more and the latter is taken up, or an ultrafiltration membrane is used to remove low molecular weight components, content of the low molecular weight components having molecular weight of not more than 5,000 are reduced to not more than 3 weight % of total weight of the binder, and said binder is used for formation of a magnetic layer and a lower coating layer of a magnetic recording medium.

摘要翻译： 使用不良溶剂从粘合剂中除去低分子量组分，其重均分子量在10,000至60,000范围内，所述不良溶剂的溶解度参数不同于粘合剂的溶解度参数大于1.3以下 不含活性氢的溶剂如乙腈，混合后的溶剂溶解度参数与粘合剂溶解度参数的差异大于1.0，小于2.0时，所用的不良溶剂用于分级 沉淀，不良溶剂为加入粘合剂溶液量的0.5-3倍，将溶液分离成液态较低分子量组分溶解的液相和溶解有高分子量组分的液体层 更多的是后者被吸收，或者使用超滤膜去除低分子量成分，低分子量的含量 分子量不大于5,000的重量组分减少到不超过粘合剂总重量的3重量％，并且所述粘合剂用于磁记录介质的磁性层和下涂层的形成。