公开(公告)号：US5700541A

公开(公告)日：1997-12-23

申请号：US571068

申请日：1995-12-12

申请人： Tsutomu Okita ,  Toshio Ishida

发明人： Tsutomu Okita ,  Toshio Ishida

IPC分类号： G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  C10M105/38 ,  C10N40/18 ,  G11B5/71 ,  G11B5/716 ,  G11B5/72 ,  G11B5/725 ,  G11B5/738

CPC分类号： G11B5/738 ,  G11B5/71 ,  G11B5/716 ,  Y10S428/90

摘要： A magnetic recording medium is described, which comprises a nonmagnetic support having provided thereon a lower layer comprising nonmagnetic or ferromagnetic particles and a binder resin, and an upper layer provided on the lower layer comprising ferromagnetic metal particles and a binder resin, wherein at least said upper layer contains as a lubricant a compound represented by the following formula (1) in an amount of 1% by weight or more based on the amount of the ferromagnetic metal particles contained in the upper layer: R.sup.1 --COO--R--OCO--R.sup.2 (1) wherein R represents --(CH.sub.2).sub.n -- or a divalent group derived from --(CH.sub.2).sub.n -- which may contain an unsaturated bond, in which n is an integer of from 1 to 10, or R represents ##STR1## and R.sup.1 and R.sup.2 are the same or different and each represents a chain unsaturated hydrocarbon group having from 12 to 26 carbon atoms.

摘要翻译： 描述了一种磁记录介质，其包括在其上设置有包含非磁性或铁磁性颗粒的下层的非磁性载体和粘合剂树脂，以及设置在下层上的包含铁磁金属颗粒和粘合剂树脂的上层，其中至少所述 上层含有下列化学式（1）表示的化合物，其含量相对于上层含有的强磁性金属粒子为1重量％以上：R1-COO-R-OCO-R2 （1）其中R表示 - （CH 2）n - 或衍生自可以含有不饱和键的 - （CH 2）n - 的二价基团，其中n为1至10的整数，或R为＆lt; IMAGE＆gt;和 R1和R2相同或不同，表示具有12-26个碳原子的链不饱和烃基。

公开(公告)号：US5560983A

公开(公告)日：1996-10-01

申请号：US524830

申请日：1995-09-07

申请人： Toshio Ishida ,  Yasushi Endo ,  Tsutomu Okita

发明人： Toshio Ishida ,  Yasushi Endo ,  Tsutomu Okita

IPC分类号： G11B5/708 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/716 ,  G11B5/738

CPC分类号： G11B5/738 ,  Y10T428/24975 ,  Y10T428/256 ,  Y10T428/265

摘要： A magnetic recording medium is described, which comprises a nonmagnetic support having on at least one side thereof a lower layer and an upper layer, in which the upper layer is a magnetic layer mainly comprising ferromagnetic particles and a binder resin, and the lower layer is adjacent to the magnetic layer and is either a magnetic layer mainly comprising ferromagnetic particles and a binder resin or a nonmagnetic layer mainly comprising nonmagnetic particles and a binder resin, wherein the upper layer has a thickness of from 0.05 to less than 1.0 .mu.m the lower layer has a thickness of from 1 to 5 .mu.m and contains unsaturated alkyl carbonate having from 17 to 45 total carbon atoms represented by the following formula in an amount of from 1.8 to 100% by weight based on the amount of the binder resin: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each represents a chain hydrocarbon group having from 8 to 22 carbon atoms, provided that at least one of R.sub.1 and R.sub.2 contains one or more unsaturated bonds; and 60 to 100% by weight of the ferromagnetic particles and nonmagnetic particles contained in the lower layer, in the case where the lower layer is a magnetic layer, has a specific surface area of from 1 to 150 m.sup.2 /g; or 60 to 100% by weight of the nonmagnetic particles contained in the lower layer, in the case where the lower layer is a nonmagnetic layer, has a specific surface area of from 1 to 150 m.sup.2 /g.

摘要翻译： 描述了一种磁记录介质，其包括在其至少一侧上具有下层和上层的非磁性载体，其中上层是主要包含铁磁颗粒和粘合剂树脂的磁性层，下层为 与磁性层相邻并且是主要包含铁磁颗粒和粘合剂树脂的磁性层或主要包含非磁性颗粒和粘合剂树脂的非磁性层的磁性层，其中上层的厚度为0.05至小于1.0μm，下层 层的厚度为1〜5μm，并且含有以下式表示的具有17至45个总碳原子的不饱和烷基碳酸酯：基于粘合剂树脂的量为1.8至100重量％： IMAGE>其中R 1和R 2相同或不同，并且各自表示具有8至22个碳原子的链烃基，条件是R 1和R 2中的至少一个包含一个 或更多的不饱和键; 和60〜100重量％的下层中含有的铁磁性粒子和非磁性粒子，在下层为磁性层的情况下，比表面积为1〜150m 2 / g， 或60〜100重量％的下层中所含的非磁性粒子，在下层为非磁性层的情况下，比表面积为1〜150m 2 / g。

公开(公告)号：US5098783A

公开(公告)日：1992-03-24

申请号：US228421

申请日：1988-08-05

申请人： Hideomi Watanabe ,  Tsutomu Okita

发明人： Hideomi Watanabe ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  G11B5/73 ,  G11B5/735

CPC分类号： G11B5/735 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/2982 ,  Y10T428/3158

摘要： A magnetic recording medium comprising a non-magnetic support having on one surface thereof a magnetic layer and on the opposite surface thereof a backing layer comprising non-magnetic particles dispersed in a binder containing a copolymer of (a) at least one of a vinyl monomer containing a dialkylaminoalkyl group and a vinyl monomer containing a quaternary salt of a dialkylaminoalkyl group, and (b) a copolymerizable vinyl monomer.

摘要翻译： 一种磁记录介质，包括在其一个表面上具有磁性层的非磁性载体，并且在其相对表面上具有包含分散在包含（a）乙烯基单体 含有二烷基氨基烷基和含有二烷基氨基烷基的季盐的乙烯基单体，和（b）可共聚的乙烯基单体。

公开(公告)号：US4970121A

公开(公告)日：1990-11-13

申请号：US229411

申请日：1988-08-08

申请人： Fumihiro Tokunaga ,  Jun Nakagawa ,  Tsutomu Okita ,  Toshio Kawamata ,  Kazuo Hasumi

发明人： Fumihiro Tokunaga ,  Jun Nakagawa ,  Tsutomu Okita ,  Toshio Kawamata ,  Kazuo Hasumi

IPC分类号： C08L75/04 ,  G11B5/702 ,  G11B5/708 ,  G11B5/71

CPC分类号： G11B5/71 ,  C08L75/04 ,  G11B5/7022 ,  G11B5/7085 ,  Y10S428/90 ,  Y10T428/31507 ,  Y10T428/31565 ,  Y10T428/31609

摘要： A magnetic recording medium comprising a nonmagnetic support having thereon a magnetic layer comprising ferromagnetic particles dispersed in a binder comprising a mixture of a polycarbonate polyurethane and a phenoxy resin in a weight ratio of from about 1.5:1 to 5:1.

摘要翻译： 一种磁记录介质，其包含非磁性载体，其上具有包含分散在包含聚碳酸酯聚氨酯和苯氧基树脂的混合物的粘合剂中的铁磁颗粒的磁性层，重量比为约1.5:1至5:1。

公开(公告)号：US4657817A

公开(公告)日：1987-04-14

申请号：US558673

申请日：1983-12-06

申请人： Tsutomu Okita ,  Kyoichi Naruo ,  Nobuo Tsuji ,  Teruo Nakagawa ,  Kiyoshi Murase ,  Takahisa Ogasawara

发明人： Tsutomu Okita ,  Kyoichi Naruo ,  Nobuo Tsuji ,  Teruo Nakagawa ,  Kiyoshi Murase ,  Takahisa Ogasawara

IPC分类号： C08F290/00 ,  C08F299/06 ,  C08G18/42 ,  C08G18/67 ,  C08L75/16 ,  C09D5/23 ,  C09D175/04 ,  C09D175/14 ,  G11B5/702 ,  G11B5/70

CPC分类号： G11B5/7026 ,  C08G18/42 ,  C08G18/672 ,  C08L75/16 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： There is provided a magnetic recording material produced by coating on a support a magnetic coating composition which contains as main components a magnetic powder and a binder, the binder comprising an urethane acrylate synthesized using a polyester polyol having a particular structure, and by irradiating the resulting magnetic coat with electron beams to harden it. The polyester polyol contains polyhydric alcohol component, 50 mole % or more of which is a dihydric alcohol selected from the class (A) described below, and/or polybasic acid component, 50 mole % or more of which is a dibasic acid selected from the class (B) described below. The urethane acrylate is synthesized under such a condition that it may have two or more of (meth)acryloyl groups per molecule. Thus, improvements in electromagnetic properties and in durability are attained.Class (A): Alkyl-substituted aliphatic dihydric alcohols, alicyclic dihydric alcohols, and dihydric alcohols made by addition of alkylene oxides to alicyclic or aromatic dihydric alcohols.Class (B): Alicyclic dicarboxylic acids and aromatic dicarboxylic acids.

摘要翻译： 提供了一种通过在载体上涂覆磁性涂料组合物而制备的磁记录材料，磁性涂料组合物含有作为主要组分的磁性粉末和粘合剂，所述粘合剂包含使用具有特定结构的聚酯多元醇合成的聚氨酯丙烯酸酯，并且通过照射所得到的 磁性涂层用电子束硬化。 聚酯多元醇含有多元醇成分，其中50摩尔％以上是选自下述（A）的二元醇，和/或多元酸成分，50摩尔％以上的二元酸选自 （B）类。 氨基甲酸酯丙烯酸酯在每分子可以具有两个以上（甲基）丙烯酰基的条件下合成。 因此，获得了电磁特性和耐久性的改善。 （A）类：烷基取代的脂族二元醇，脂环族二元醇和通过将环氧烷烃加成到脂环族或芳族二元醇中制得的二元醇。 类（B）：脂环族二羧酸和芳族二羧酸。

公开(公告)号：US4576866A

公开(公告)日：1986-03-18

申请号：US592671

申请日：1984-03-23

申请人： Tsutomu Okita ,  Nobuo Tsuji ,  Yoshito Mukaida

发明人： Tsutomu Okita ,  Nobuo Tsuji ,  Yoshito Mukaida

IPC分类号： C08L75/16 ,  C09D5/23 ,  C09D101/18 ,  C09D127/04 ,  C09D127/06 ,  C09D175/04 ,  G11B5/702 ,  G11B5/70

CPC分类号： G11B5/7026 ,  C08L75/16 ,  G11B5/7022 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/31609 ,  Y10T428/31935

摘要： There is provided a magnetic recording material which comprises a support and a magnetic layer coated thereon. The magnetic layer contains as its binder, a combination of at least one vinyl chloride-vinyl acetate-based copolymer characterized by its --CO.sub.2 H content or cellulose dinitrate, at least one urethane acrylate having a particular chemical structure, and at least one low molecular weight compound having two or more acryloyl or methacryloyl groups. The magnetic layer is hardened by beam irradiation. Thus, marked increase in dispersibility of ferromagnetic powders, improvement in electromagnetic transformation characteristics and sharp increase in durability are attained.

摘要翻译： 提供了一种磁记录材料，其包括载体和涂覆在其上的磁性层。 磁性层包含作为其粘合剂的至少一种以其-CO 2 H含量或硝酸纤维素为特征的氯乙烯 - 乙酸乙烯酯基共聚物，至少一种具有特定化学结构的氨基甲酸酯丙烯酸酯和至少一种低分子量 具有两个以上丙烯酰基或甲基丙烯酰基的化合物。 磁性层通过光束照射而硬化。 因此，铁磁粉末的分散性显着增加，电磁转变特性的提高和耐久性急剧增加。

公开(公告)号：US4533565A

公开(公告)日：1985-08-06

申请号：US613759

申请日：1984-05-24

申请人： Tsutomu Okita

发明人： Tsutomu Okita

IPC分类号： B22F9/20 ,  C09D5/23 ,  C09D7/12 ,  G11B5/712 ,  H01F1/06 ,  H01F1/11

CPC分类号： G11B5/712

摘要： A method for the surface treatment of a ferromagnetic fine powder is disclosed. The method increases the dispersibility of the powder in a magnetic coating composition. The method comprises subjecting a magnetic composition to a dispersing processing, with the magnetic composition containing (1) a ferromagnetic fine powder, (2) at least one polar compound selected from a group consisting of such compounds as to have one or more of --COOH, --CONH.sub.2, --CONH.sub.2, --PO.sub.3 H, --SO.sub.3 H, --OH or --NH.sub.2 in a molecule and quaternary ammonium salts, and (3) an organic solvent capable of dissolving the polar compound, and evaporating the organic solvent from the magnetic composition.

摘要翻译： 公开了一种铁磁性细粉末的表面处理方法。 该方法增加了粉末在磁性涂料组合物中的分散性。 该方法包括使磁性组合物进行分散处理，其中磁性组合物含有（1）铁磁性细粉末，（2）至少一种选自以下化合物的极性化合物：具有一个或多个-COOH ，-CONH 2，-CONH 2，-PO 3 H，-SO 3 H，-OH或-NH 2，和季铵盐，和（3）能够溶解极性化合物的有机溶剂，并从磁性组合物中蒸发有机溶剂。

公开(公告)号：US4407853A

公开(公告)日：1983-10-04

申请号：US364346

申请日：1982-04-01

申请人： Tsutomu Okita ,  Kyoichi Naruo ,  Goro Akashi

发明人： Tsutomu Okita ,  Kyoichi Naruo ,  Goro Akashi

IPC分类号： G11B5/842 ,  G11B5/845 ,  H01F10/02 ,  B05D3/06

CPC分类号： G11B5/845

摘要： A process for producing a magnetic recording medium by applying onto a base a magnetic coating composition comprising ferromagnetic particles dispersed in a solution comprising a compound polymerizable by electron beams and a low boiling solvent is disclosed. The ferromagnetic particles in the applied magnetic coating are oriented while it is still wet, and thereafter the oriented web is irradiated with electron beams within 5 seconds after orientation to retain the ferromagnetic particles orientation and the web is dried by evaporating the solvent.

摘要翻译： 公开了一种制造磁记录介质的方法，该方法通过将包含分散在包含可电子束可聚合的化合物的溶液和低沸点溶剂的溶液中的铁磁颗粒涂覆在基底上。 所施加的磁性涂层中的铁磁颗粒在其仍然是湿润的同时取向，然后在定向后5秒内用电子束照射定向的网，以保持铁磁颗粒取向，并通过蒸发溶剂来干燥网。

公开(公告)号：US5607782A

公开(公告)日：1997-03-04

申请号：US105614

申请日：1993-08-13

申请人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

发明人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

IPC分类号： G11B5/66 ,  C10M105/54 ,  C10M105/72 ,  C10M105/74 ,  C10N40/18 ,  G11B5/64 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73

CPC分类号： G11B5/725 ,  Y10S428/90

摘要： A magnetic recording medium, comprising a magnetic layer having ferromagnetic metallic thin film at least on one side of a non-magnetic support, whereby a layer is formed on the magnetic layer, said layer contains at least one type of fluorine compounds having at least two perfluoroalkyl groups given by the following general formula (1) or (2) and one or more polar groups selected from --OH, --COOM, --SO.sub.3 M, --OSO.sub.3 M, --PO.sub.3 M.sub.2 or --OPO.sub.3 M.sub.2 (M representing hydrogen atom, alkali metal or ammonium):General formula (1)CF.sub.3 CF.sub.2 (CF.sub.2).sub.n (CH.sub.2)--.sub.mGeneral formula (2)(CF.sub.3).sub.2 CF(CF.sub.2).sub.n (CH.sub.2)--.sub.mwhere n is a number of 2 to 10, m is a number of 1 to 18, and n+m are an integer of 6 to 26.

摘要翻译： 一种磁记录介质，包括在非磁性载体的至少一侧上具有铁磁性金属薄膜的磁性层，由此在所述磁性层上形成一层，所述层包含至少一种氟化合物，所述氟化合物具有至少两个 由以下通式（1）或（2）给出的全氟烷基和一个或多个选自-OH，-COOM，-SO 3 M，-OSO 3 M，-PO 3 M 2或-OPO 3 M 2的极性基团（M代表氢原子，碱金属或铵 ）通式（1）CF 3 CF 2（CF 2）n（CH 2）-m通式（2）（CF 3）2 CF（CF 2）n（CH 2）-m其中n为2〜10的数，m为1〜 18，n + m为6〜26的整数。

公开(公告)号：US5496645A

公开(公告)日：1996-03-05

申请号：US371672

申请日：1995-01-12

申请人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

发明人： Toshio Ishida ,  Masaki Satake ,  Tsutomu Okita

IPC分类号： G11B5/66 ,  C10M105/54 ,  C10M105/68 ,  C10N40/18 ,  G11B5/72 ,  G11B5/725 ,  G11B5/84 ,  G11B5/00

CPC分类号： G11B5/725 ,  Y10S428/90 ,  Y10T428/3154 ,  Y10T428/31678

摘要： A magnetic recording medium having a magnetic layer on a non-magnetic support, whereby an organic fluorine compound given by the following general formulae (1) or (2) is formed on said magnetic layer: ##STR1## where Rf.sup.1, Rf.sup.2 and Rf.sup.3 each represents a fluoroalkyl group, Y.sup.1, Y.sup.2 and Y.sup.3 each represents --O--, --OCO--, --COO, --NHCO--, or --CONH--and may be the same or different;R.sup.1 represents .dbd.CH.sub.2, .dbd.CH(CH.sub.2).sub.k CH.sub.3, or .dbd.CHCH.dbd.CH.sub.2, and k is a number from 0 to 2;R.sup.2 and R.sup.5 each represents H, and R.sup.2 is not present in case the carbon to which R.sup.2 is bonded has double bond.R.sup.3, R.sup.4 or R.sup.6 each represents H or a hydrocarbon group, which may have double bond.A, B and X each represents (CH.sub.2).sub.k, and k is a number from 0 to 2, and b is a number of 0 or one or higher.Rf.sup.1, Rf.sup.2, Rf.sup.3, Y.sup.1, Y.sup.2, Y.sup.3, A, B, X, R.sup.4, R.sup.5, R.sup.6, k, n, and m may be the same or different, and these may be cis type or trans type.

摘要翻译： 一种在非磁性载体上具有磁性层的磁记录介质，由此在所述磁性层上形成由以下通式（1）或（2）给出的有机氟化合物：其中Rf1，Rf2和 Rf 3各自表示氟烷基，Y 1，Y 2和Y 3各自表示-O-，-OCO-，-COO，-NHCO-或-CONH-，可以相同或不同; R1表示= CH2，= CH（CH2）kCH3或= CHCH = CH2，k表示0〜2的数。 R2和R5各自表示H，R2键合的碳为双键时不存在。 R3，R4或R6各自表示H或可具有双键的烃基。 A，B和X各自表示（CH 2）k，k为0〜2的数，b为0以上1以上的数。 Rf1，Rf2，Rf3，Y1，Y2，Y3，A，B，X，R4，R5，R6，k，n和m可以相同或不同，它们可以是顺式或反式。