公开(公告)号：US5908691A

公开(公告)日：1999-06-01

申请号：US772575

申请日：1996-12-26

申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  C09D175/04 ,  G11B5/702 ,  G11B5/738

CPC分类号： G11B5/738 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/31609

摘要： The present invention provides a magnetic recording medium having high durability and excellent electromagnetic transfer characteristics and having a lower coating layer, which contains a binder and has high dispersion property and durability. The magnetic recording medium comprises a lower coating layer where non-magnetic powder or ferromagnetic power is dispersed in a binder and an upper magnetic layer where ferromagnetic powder is dispersed in a binder, said two layers being placed on a non-magnetic support member, whereby the binder of the lower coating layer comprises polyurethane resin, which is a reaction product using diol and organic diisocyanate as major materials, the polyurethane resin contains short-chain diol having cyclic structure by 17 to 40 weight %, and the polyurethane resin contains long-chain diol, containing ether groups by 1.0 to 5.0 mmol/g to the entire polyurethane resin, by 10 to 50 weight %.

摘要翻译： 本发明提供一种具有高耐久性和优异的电磁传递特性的磁记录介质，并具有包含粘合剂并具有高分散性和耐久性的下涂层。 磁记录介质包括其中非磁性粉末或铁磁力分散在粘合剂中的下涂层和将铁磁性粉末分散在粘合剂中的上磁性层，所述两层位于非磁性支撑构件上，由此 下涂层的粘合剂包含聚氨酯树脂，其是使用二醇和有机二异氰酸酯作为主要材料的反应产物，所述聚氨酯树脂包含具有17至40重量％的环状结构的短链二醇，并且所述聚氨酯树脂包含长链， 链状二醇，含有醚基团，1.0〜5.0mmol / g，相对于整个聚氨酯树脂，为10〜50重量％。

公开(公告)号：US06376083B1

公开(公告)日：2002-04-23

申请号：US08532976

申请日：1995-09-22

申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

IPC分类号： G11B5702

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： The present invention provides a magnetic recording medium having high dispersion property, good running durability and good preservation property, and it comprises at least one magnetic layer having ferromagnetic powder dispersed by a binder placed on a non-magnetic support member, whereby a polyurethane resin or a polyurethane urea resin consisting of 5 mol % or less of a long chain diol having weight average molecular weight of 800 to 5,000, a short chain diol having weight average molecular weight of 50 to 500 and/or a short chain diamine and an organic diisocyanate is contained as the binder, said long chain diol has one polar group selected from —COOM, —SO3M, —OSO3M, —OPO(OM)2, or —PO(OM)2 (where M represents a hydrogen atom, an alkali metal ion, or an ammonium ion) in the molecule, and the polar group is contained in the polyurethane by 1 to 5 mol %.

摘要翻译： 本发明提供了具有高分散性，良好的运行耐久性和良好保存性的磁记录介质，并且它包括至少一个磁性层，该磁性层具有通过放置在非磁性支撑构件上的粘合剂分散的铁磁性粉末，由此聚氨酯树脂或 由5重量％以下的重均分子量为800〜5000的长链二醇，重均分子量为50〜500的短链二醇和/或短链二胺和有机二异氰酸酯组成的聚氨酯脲树脂 所述长链二醇具有一个选自-COOM，-SO3M，-OSO3M，-OPO（OM）2或-PO（OM）2的极性基团（其中M表示氢原子，碱金属 离子或铵离子），聚氨酯中的极性基团含有1〜5摩尔％。

公开(公告)号：US5484661A

公开(公告)日：1996-01-16

申请号：US179942

申请日：1994-01-11

申请人： Hiroshi Hashimoto ,  Masaki Satake ,  Yuichiro Murayama ,  Tsutomu Okita

发明人： Hiroshi Hashimoto ,  Masaki Satake ,  Yuichiro Murayama ,  Tsutomu Okita

IPC分类号： C08F8/34 ,  C09D5/23 ,  C09D129/14 ,  G11B5/702 ,  G11B5/716 ,  G11B5/735 ,  G11B5/738 ,  G11B5/00

CPC分类号： G11B5/7023 ,  G11B5/735 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/31935

摘要： A binder for a magnetic recording medium which contains a polyvinyl alkylal resin modified by a sultone to introduce thereinto an atom group containing a polar group. Also disclosed is a magnetic recording medium that uses the above-described binder in a magnetic layer, a non-magnetic layer, a protective layer, an undercoat layer, etc. The binder and the magnetic recording medium are superior in dispersibility and exhibit high magnetic coating strength.

摘要翻译： 一种用于磁记录介质的粘合剂，其包含由磺内酯改性的聚乙烯基烷基树脂以引入含有极性基团的原子团。 还公开了在磁性层，非磁性层，保护层，底涂层等中使用上述粘合剂的磁记录介质。粘合剂和磁记录介质具有优异的分散性并表现出高磁性 涂层强度。

公开(公告)号：US5747157A

公开(公告)日：1998-05-05

申请号：US705268

申请日：1996-08-29

申请人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

发明人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  C09D175/08 ,  G11B5/702 ,  G11B5/738

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： The invention relates to a binder which improves the dispersibility of ferromagnetic powders and makes it possible to achieve a magnetic recording medium excellent in operation durability and storability, and a magnetic recording medium using such a binder. The invention provides a magnetic recording medium including a non-magnetic support substrate and a magnetic layer formed on said support substrate, said magnetic layer comprising a dispersion of ferromagnetic fine powders in a binder, wherein said binder comprises a polyurethane resin that is a reaction product obtained by using a polyol and an organic diisocyanate as main starting materials, said polyurethane resin containing as components of said polyol 15 to 40% by weight of a short-chain diol component having a cyclic structure, and 10 to 50% by weight of a long-chain polyether polyol component, and further including a polar group-containing long-chain polyol component having a molecular weight of 500 to 5,000.

摘要翻译： 本发明涉及一种提高铁磁性粉末的分散性的粘合剂，能够实现操作耐久性和保存性优异的磁记录介质，以及使用这种粘合剂的磁记录介质。 本发明提供了一种磁记录介质，其包括非磁性支撑基板和形成在所述支撑基板上的磁性层，所述磁性层包含铁磁细粉末在粘合剂中的分散体，其中所述粘合剂包括作为反应产物的聚氨酯树脂 通过使用多元醇和有机二异氰酸酯作为主要原料，所述聚氨酯树脂作为所述多元醇的组分含有15〜40重量％的具有环状结构的短链二醇组分和10〜50重量％的 长链聚醚多元醇成分，还含有分子量为500〜5000的含极性基团的长链多元醇成分。

公开(公告)号：US5525418A

公开(公告)日：1996-06-11

申请号：US364408

申请日：1994-12-23

申请人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

发明人： Hiroshi Hashimoto ,  Yuichiro Murayama ,  Masaki Satake ,  Tsutomu Okita

IPC分类号： G11B5/702 ,  C09D5/23 ,  C09D175/04 ,  G11B5/716 ,  G11B5/735 ,  G11B5/738 ,  G11B5/00

CPC分类号： G11B5/7021 ,  G11B5/735 ,  G11B5/738 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/31609 ,  Y10T428/31935

摘要： A binder for a magnetic recording medium comprising a polyurethane which is a reaction product obtained from a polyol and a polyisocyanate as principal raw materials. The polyol is an aliphatic polyol with a molecular weight of not lower than 500. The binder has high dispersibility and provides excellent running durability and shelf stability. Also disclosed is a magnetic recording medium having at least one magnetic or non-magnetic layer containing the above-described binder on at least one surface of a non-magnetic support.

摘要翻译： 一种用于磁记录介质的粘合剂，其包含作为主要原料的由多元醇和多异氰酸酯获得的反应产物的聚氨酯。 多元醇是分子量不低于500的脂肪族多元醇。粘合剂具有高分散性，并提供优异的运行耐久性和储存稳定性。 还公开了一种在非磁性载体的至少一个表面上具有含有上述粘合剂的至少一个磁性或非磁性层的磁记录介质。

公开(公告)号：US5702821A

公开(公告)日：1997-12-30

申请号：US555447

申请日：1995-11-09

申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： In a binder for a magnetic recording medium for forming a magnetic layer with ferromagnetic powder dispersed therein being arranged on a non-magnetic support member, whereby said binder consists of a polyurethane resin, which is a reaction product of diol and organic diisocyanate as principal materials, said polyurethane resin contains a short-chain diol having cyclic structure by 17 to 40 weight %, and said polyurethane resin contains a long-chain diol comprising 1.0 to 5.0 mmol/g of ether group to total urethane resin by 10 to 50 weight %. According to a binder for a magnetic recording medium and a magnetic recording medium using said binder of the present invention, good dispersion property, high running durability and preservation property can be obtained.

摘要翻译： 在用于形成其中分散有铁磁性粉末的磁性层的磁记录介质的粘合剂中，其布置在非磁性支撑构件上，由此所述粘合剂由作为主要材料的二醇和有机二异氰酸酯的反应产物的聚氨酯树脂 所述聚氨酯树脂含有具有17〜40重量％的环状结构的短链二醇，所述聚氨酯树脂含有长链二醇，其含有1.0〜5.0mmol / g的醚基与总聚氨酯树脂的比例为10〜50重量％ 。 根据本发明的磁记录介质用粘合剂和使用该粘合剂的磁记录介质，可以获得良好的分散性，高运行耐久性和保存性。

公开(公告)号：US5612134A

公开(公告)日：1997-03-18

申请号：US687796

申请日：1996-07-19

申请人： Tsutomu Okita ,  Hideomi Watanabe ,  Toshio Ishida ,  Masaki Satake ,  Hiroshi Hashimoto

发明人： Tsutomu Okita ,  Hideomi Watanabe ,  Toshio Ishida ,  Masaki Satake ,  Hiroshi Hashimoto

IPC分类号： C10M169/04 ,  C10M101/00 ,  C10M105/52 ,  C10M131/12 ,  C10M135/10 ,  C10M137/02 ,  C10M137/04 ,  C10N30/06 ,  C10N40/18 ,  G11B5/66 ,  G11B5/71 ,  G11B5/72 ,  G11B5/725 ,  G11B5/735 ,  G11B5/84

CPC分类号： G11B5/72 ,  G11B5/725 ,  G11B5/735 ,  G11B5/8408 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/30 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31678

摘要： A magnetic recording medium having a ferromagnetic metal thin film on at least one surface of a non-magnetic support. The magnetic recording medium has a surface layer containing at least either one of fluorine compounds represented by the following formulae (1) and (2):Rf-R.sub.1 Formula (1)Rf-R.sub.2 -Rf Formula (2)whereRf: (CF.sub.3).sub.a CF.sub.3-a (CF.sub.2).sub.ba: 1 to 3a+b: 1 to 11R.sub.1 : an alkyl or alkenyl group having from 8 to 26 carbon atomsR.sub.2 : an alkylene or alkenylene group having from 2 to 14 carbon atoms.The surface layer may be formed on a carbon film provided on the ferromagnetic metal thin film. The surface layer may further contain a fluorine compound having at least one polar group and a perfluoroalkyl group, and a rust inhibitor. These components may be contained in or coated on a back coat layer. The magnetic recording medium is excellent in running properties, durability and shelf stability.

摘要翻译： 一种在非磁性载体的至少一个表面上具有强磁性金属薄膜的磁记录介质。 磁记录介质具有含有下述式（1）和（2）表示的氟化合物中的至少一种的表面层：Rf-R1式（1）Rf-R2-Rf式（2）其中Rf：（CF3 ）aCF3-a（CF2）ba：1至3a + b：1至11 R1：具有8至26个碳原子的烷基或烯基R2：具有2至14个碳原子的亚烷基或亚烯基。 表面层可以形成在设置在强磁性金属薄膜上的碳膜上。 表面层还可以含有具有至少一个极性基团和全氟烷基的氟化合物和防锈剂。 这些组分可以包含在或涂覆在背涂层上。 磁记录介质的运行性能，耐久性和货架稳定性优异。

公开(公告)号：US5458979A

公开(公告)日：1995-10-17

申请号：US243917

申请日：1994-05-17

申请人： Hiroshi Hashimoto ,  Masaki Satake ,  Yuuichirou Murayama ,  Tsutomu Okita

发明人： Hiroshi Hashimoto ,  Masaki Satake ,  Yuuichirou Murayama ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  C09D129/14 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/716 ,  G11B5/00

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31609 ,  Y10T428/31935

摘要： A magnetic recording medium comprising a nonmagnetic support having on at least one side thereof a magnetic layer comprising a ferromagnetic particle and a binder, wherein the binder comprises a polyvinyl acetal resin having a polar group and a polyurethane resin having a polar group; and a magnetic recording medium comprising (a) a nonmagnetic support having on at least one side thereof at least one of a lower magnetic layer comprising a ferromagnetic particle and a binder and a nonmagnetic layer comprising a nonmagnetic particle and a binder and (b) an upper magnetic layer comprising a ferromagnetic particle and a binder provided thereon, wherein at least the binder contained in the upper magnetic layer comprises a polyvinyl acetal resin having a polar group and a polyurethane resin having a polar group.

摘要翻译： 一种包含非磁性载体的磁记录介质，其至少在其一侧具有包含铁磁颗粒和粘合剂的磁性层，其中所述粘合剂包括具有极性基团的聚乙烯醇缩醛树脂和具有极性基团的聚氨酯树脂; 和磁记录介质，其包含（a）非磁性载体，其至少在其一侧具有包含铁磁颗粒和粘合剂的下磁性层和至少一个包含非磁性颗粒和粘合剂的非磁性层，和（b） 上磁性层包括铁磁颗粒和其上提供的粘合剂，其中至少包含在上磁性层中的粘合剂包含具有极性基团的聚乙烯醇缩醛树脂和具有极性基团的聚氨酯树脂。

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。