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1.发明授权Magnetic recording medium having a carbon protective layer and a fluoro-lubricant supplied from a backcoat layer 失效具有碳保护层和从后涂层供应的氟润滑剂的磁记录介质
公开(公告)号：US5612134A
公开(公告)日：1997-03-18
申请号：US687796
申请日：1996-07-19
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。
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2.发明授权Magnetic recording medium having ferromagnetic powder, a binder containing a specified vinyl chloride copolymer, polar group containing polyurethane resin and a fatty acid amide 失效具有铁磁粉末的磁记录介质，含有特定氯乙烯共聚物的粘合剂，含极性基团的聚氨酯树脂和脂肪酸酰胺
公开(公告)号：US5258231A
公开(公告)日：1993-11-02
申请号：US908916
申请日：1992-07-02
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder and a binder material, wherein the magnetic layer contains at least a vinyl chloride copolymer binder having at least one polar group selected from --SO.sub.3 M and --COOM, wherein M represents a hydrogen atom, an alkali metal, or an ammonium ion, and at least one epoxy group per molecule in an amount of 1.times.10.sup.-4 to 1.times.10.sup.-2 per gram, and a fatty acid amide having from 12 to 26 atoms and present in an amount of from 0.05 to 2 wt % based on the amount of the ferromagnetic powder, and wherein the content of the polar group in the vinyl chloride copolymer binder is from about 1.times.10.sup.-7 to 1.times.10.sup.-3 equivalent per gram, and wherein the vinyl chloride copolymer binder has a weight average molecular weight of from 20,000 to 100,000 and wherein the magnetic layer further contains a polyurethane resin having a polar group.
摘要翻译： 一种磁记录介质，包括非磁性载体，其上设置有包含铁磁性粉末和粘合剂材料的磁性层，其中所述磁性层至少含有具有至少一个选自-SO 3 M和-COOM的极性基团的氯乙烯共聚物粘合剂 ，其中M表示氢原子，碱金属或铵离子，每分子中至少一个环氧基团的量为1×10 -4至1×10 -2 /克，具有12至26个原子的脂肪酸酰胺 并且以铁磁粉末的量计为0.05-2重量％，其中氯乙烯共聚物粘合剂中极性基团的含量为每克约1×10-7至1×10-3当量， 其中所述氯乙烯共聚物粘合剂的重均分子量为20,000至100,000，并且其中所述磁性层还含有具有极性基团的聚氨酯树脂。
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3.发明授权Magnetic recording medium containing magnetic particles surface treated with a glycidyl compound 失效含有用缩水甘油基化合物表面处理的磁性颗粒的磁记录介质
公开(公告)号：US5082733A
公开(公告)日：1992-01-21
申请号：US340617
申请日：1989-04-18
申请人： Hideomi Watanabe , Mikio Ohno , Hiroshi Hashimoto , Tsutomu Okita
发明人： Hideomi Watanabe , Mikio Ohno , Hiroshi Hashimoto , Tsutomu Okita
CPC分类号： G11B5/712 , Y10S428/90 , Y10T428/2991 , Y10T428/2998
摘要： A method for preparing a magnetic recording medium is disclosed, comprising the steps of (1) surface-treating ferromagnetic particles with a glycidyl compound having a molecular weight of 1,000 or less and having an epoxy equivalent of 200 g/eq. or less, (2) dispersing the surface-treated ferromagnetic particles with a binder to prepare a magnetic coating composition, (3) coating the resulting magnetic coating composition on a nonmagnetic support, and then (4) drying the magnetic coating composition.
摘要翻译： 公开了一种制备磁记录介质的方法，包括以下步骤：（1）用分子量为1,000或更小的环氧当量为200g / eq的缩水甘油基化合物对铁磁颗粒进行表面处理。 （2）用粘合剂分散表面处理的铁磁颗粒以制备磁性涂料组合物，（3）将所得磁性涂料组合物涂布在非磁性载体上，然后（4）干燥磁性涂料组合物。
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公开(公告)号：US5045351A
公开(公告)日：1991-09-03
申请号：US423290
申请日：1989-10-18
IPC分类号： G11B5/702
CPC分类号： G11B5/7022
摘要： A process for producing a magnetic recording medium which comprises a step of kneading a ferromagnetic powder with a binder in the presence of a solvent, a step of dispersing the resulting blend with the binder and/or solvent, and a step of coating the resulting magnetic coating composition on a nonmagnetic support followed by drying;Wherein said step of kneading is carried out by kneading a ferromagnetic powder having a particle size of not more than 350 .ANG. with a glycidyl compound and a binder comprising at least a vinyl chloride copolymer having an OH- terminated side chain bonded via an organic group and also having a polar group and/or a solvent; said binder, polyurethane resin, and solvent being used in a total amount of from 40 to 70 parts by weight per 100 parts by weight of said ferromagnetic powder; and wherein said step of dispersing is carried out in the presence of additional polyurethane resin having a polar group and/or solvent.
摘要翻译： 一种制造磁记录介质的方法，包括在溶剂存在下将铁磁性粉末与粘合剂混合的步骤，用粘合剂和/或溶剂分散所得共混物的步骤，以及涂覆所得磁性 涂覆组合物在非磁性载体上，然后干燥; 其中所述捏合步骤是通过将具有不超过350埃格姆的粒度的铁磁性粉末与缩水甘油基化合物和包含至少一种具有通过有机基团键合有OH-封端的侧链的氯乙烯共聚物的粘合剂进行的，以及 也具有极性基团和/或溶剂; 所述粘合剂，聚氨酯树脂和溶剂的使用总量为每100重量份所述铁磁粉末为40至70重量份; 并且其中所述分散步骤在具有极性基团和/或溶剂的另外的聚氨酯树脂的存在下进行。
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5.发明授权Magnetic recording medium wherein the magnetic layer has as the binder system a vinyl chloride copolymer and a polyether polyurethane resin which contains a ring structure 失效磁性记录介质，其中磁性层具有作为粘合剂体系的氯乙烯共聚物和含有环结构的聚醚聚氨酯树脂
公开(公告)号：US5153071A
公开(公告)日：1992-10-06
申请号：US707971
申请日：1991-05-23
CPC分类号： G11B5/7022 , C08L75/08 , Y10S428/90 , Y10T428/3158 , Y10T428/31609
摘要： A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic particles disposed in a binder, the binder comprising a vinyl chloride copolymer and a polyurethane resin, wherein the polyurethane resin is a polyether polyurethane resin containing a polyether polyol having a ring structure.
摘要翻译： 一种包含非磁性载体的磁记录介质，其上具有包含设置在粘合剂中的铁磁颗粒的磁性层，所述粘合剂包括氯乙烯共聚物和聚氨酯树脂，其中所述聚氨酯树脂是含有聚醚多元醇的聚醚聚氨酯树脂， 环结构。
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6.发明授权Magnetic recording medium having a lower layer containing a specified polyurethane binder 失效具有含有特定聚氨酯粘合剂的下层的磁记录介质
公开(公告)号：US5908691A
公开(公告)日：1999-06-01
申请号：US772575
申请日：1996-12-26
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％。
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公开(公告)号：US06376083B1
公开(公告)日：2002-04-23
申请号：US08532976
申请日：1995-09-22
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％。
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公开(公告)号：US5484661A
公开(公告)日：1996-01-16
申请号：US179942
申请日：1994-01-11
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。
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公开(公告)号：US5747157A
公开(公告)日：1998-05-05
申请号：US705268
申请日：1996-08-29
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。
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10.发明授权Magnetic recording medium having a magnetic layer containing ferromagnetic powder and a polyurethane resin obtained from a polyolefin polyol or a polybutadiene polyol 失效具有含有铁磁粉末的磁性层和由聚烯烃多元醇或聚丁二烯多元醇得到的聚氨酯树脂的磁记录介质
公开(公告)号：US5525418A
公开(公告)日：1996-06-11
申请号：US364408
申请日：1994-12-23
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。
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