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21. 发明授权

US5212019A Magnetic recording medium having a magnetic layer containing ferromagnetic metal powder, binder, fatty acid ester, and a specified branched chain fatty acid 失效
标题翻译：具有含有铁磁金属粉末，粘合剂，脂肪酸酯和特定支链脂肪酸的磁性层的磁记录介质
公开(公告)号：US5212019A
公开(公告)日：1993-05-18
申请号：US940733
申请日：1992-09-08
申请人： Katsumi Ryoke , Yutaka Kakuishi , Masaki Suzuki
发明人： Katsumi Ryoke , Yutaka Kakuishi , Masaki Suzuki
IPC分类号： G11B5/702 , G11B5/71
CPC分类号： G11B5/7028 , G11B5/71 , Y10S428/90
摘要： A magnetic recording medium in which the generation of white powder is suppressed, which recording medium maintains an appropriate running tension and exhibits a reduced level of dropouts and head clogging, comprising a non-magnetic support having thereon a magnetic layer, the magnetic layer containing a ferromagnetic powder and a binder, the ferromagnetic powder is a ferromagnetic metal powder and the magnetic layer contains a branched chain fatty acid represented by formula (I):R.sub.2 CH(CH.sub.2).sub.m COOH (I)wherein R represents CH.sub.3 (CH.sub.2).sub.n, n represents an integer of 8 or more, and m represents 0 or 1 in an amount of from 0.5 to 3 parts by weight per 100 parts by weight of said ferromagnetic metal powder.
摘要翻译：其中抑制了白色粉末的产生的磁记录介质，该记录介质保持适当的运行张力并且表现出降低的压差和头部堵塞水平，包括其上具有磁性层的非磁性载体，该磁性层含有铁磁粉末和粘合剂，铁磁性粉末是强磁性金属粉末，磁性层含有由式（I）表示的支链脂肪酸：R2CH（CH2）mCOOH（Ⅰ），其中R表示CH3（CH2）n，n表示 8个以上的整数，m表示0或1，相对于所述铁磁性金属粉末为100重量份，为0.5〜3重量份。

22. 发明授权

US5196265A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5196265A
公开(公告)日：1993-03-23
申请号：US772748
申请日：1991-10-07
申请人： Katsumi Ryoke , Yutaka Kakuishi , Toshiyuki Kitahara
发明人： Katsumi Ryoke , Yutaka Kakuishi , Toshiyuki Kitahara
IPC分类号： C09D5/23 , C09D7/12 , G11B5/73
CPC分类号： G11B5/7305 , Y10S428/90 , Y10T428/12931 , Y10T428/12937 , Y10T428/26 , Y10T428/31786
摘要： A magnetic recording medium comprising a non-magnetic support having thereon a magnetic layer containing a ferromagnetic powder and a binder, the non-magnetic support comprising polyethylene naphthalate in which Young's modulus in the transversal direction is at least 700 kg/mm.sup.2 and Young's modulus in the mechanical direction is less than 800 kg/mm.sup.2, the ferromagnetic powder being magnetic metal powder, and the total thickness of the magnetic recording material being not more than 11 .mu.m.
摘要翻译：一种磁记录介质，包括其上具有含有铁磁性粉末和粘合剂的磁性层的非磁性载体，所述非磁性载体包含聚萘二甲酸乙二醇酯，其中横向的杨氏模量为至少700kg / mm 2，杨氏模量为机械方向小于800kg / mm2，铁磁粉末为磁性金属粉末，磁记录材料的总厚度不大于11μm。

23. 发明授权

US5008147A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5008147A
公开(公告)日：1991-04-16
申请号：US216566
申请日：1988-07-08
申请人： Katsumi Ryoke , Masatoshi Takahashi , Akihiro Hashimoto , Kazuo Hasumi
发明人： Katsumi Ryoke , Masatoshi Takahashi , Akihiro Hashimoto , Kazuo Hasumi
IPC分类号： C09D5/23 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30 , Y10T428/31609
摘要： A magnetic recording medium comprising a nonmagnetic support having on one surface thereof a magnetic layer and on the opposite surface thereof a backing layer comprising nonmagnetic particles dispersed in a binder, wherein said binder of said backing layer comprises from about 20 to 90 wt % of polycarbonate polyurethane, and said backing layer comprises from about 40 to 200 parts by weight of said binder per 100 parts by weight of said nonmagnetic particles.
摘要翻译：一种磁记录介质，其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粘合剂中的非磁性颗粒的背衬层，其中所述背衬层的所述粘合剂包含约20至90重量％的聚碳酸酯聚氨酯和所述背衬层每100重量份所述非磁性颗粒包含约40至200重量份的所述粘合剂。

24. 发明授权

US4734325A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4734325A
公开(公告)日：1988-03-29
申请号：US784076
申请日：1985-10-04
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer being provided on one surface of the support and a backing layer being provided on the surface of the support opposite to said magnetic layer, the backing layer contains binder and non-magnetic particles comprised of (i) corbon black having an average particle size of 0.1 to 1.0 .mu.m and (ii) particles of abrasives having a Mohs' hardness of at least 6 and an average particle size of 1 .mu.m or less, with the non-magnetic particles in said backing layer being used in an amount of 40 to 300 parts by weight per 100 parts by weight of binder.
摘要翻译：一种磁记录介质，包括在其上设置有磁性层的非磁性载体，所述磁性层设置在所述载体的一个表面上，背衬层设置在所述载体的与所述磁性层相对的表面上，所述背衬层包含粘合剂和非磁性层，磁性粒子由（i）平均粒径为0.1〜1.0μm的cor黑，（ⅱ）莫氏硬度至少为6，平均粒径为1μm以下的磨料颗粒组成，所述背衬层中的非磁性颗粒的使用量为每100重量份粘合剂为40至300重量份。

25. 发明授权

US4731278A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4731278A
公开(公告)日：1988-03-15
申请号：US862724
申请日：1986-05-13
申请人： Katsumi Ryoke , Masatoshi Takahashi , Eiichi Tadokoro
发明人： Katsumi Ryoke , Masatoshi Takahashi , Eiichi Tadokoro
IPC分类号： C01G49/00 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/702 , G11B5/706 , G11B5/708 , G11B5/714 , G11B5/73 , G11B5/735 , H01F1/11
CPC分类号： G11B5/7085 , G11B5/7023 , G11B5/714 , Y10S428/90 , Y10T428/24355 , Y10T428/25 , Y10T428/257
摘要： A magnetic recording medium is described, comprising a magnetic layer containing ferromagnetic fine particles and a binder coated on one side of a non-magnetic support and a backing layer coated on the opposite side of the non-magnetic support, wherein said ferromagnetic fine particles have a cobalt content of from 2 to 10 wt % with respect to the iron oxide content thereof, the content of divalent iron (Fe.sup.2+) of from 1 to 10 wt % with respect to the trivalent iron (Fe.sup.3+) content thereof, and the specific surface area of from 30 to 50 m.sup.2 /g, said binder comprises a copolymer of vinyl chloride-vinyl acetate-maleic acid contained in an amount of 40 wt % or more with respect to the total binder content of the magnetic layer, an abrasive agent having a Mohs hardness of 6 or more is contained in said magnetic layer, and the resulting magnetic tape has a coercive force of from 750 to 900 Oe at 25.degree. C.
摘要翻译：描述了一种磁记录介质，其包括含有铁磁细颗粒的磁性层和涂覆在非磁性载体的一侧上的粘合剂和涂覆在非磁性载体的相对侧上的背衬层，其中所述铁磁细颗粒具有相对于其氧化铁含量为2〜10重量％的钴含量，相对于三价铁（Fe3 +）含量，二价铁（Fe 2+）的含量为1〜10重量％，比表面积面积为30〜50m2 / g，所述粘合剂包含相对于磁性层的总粘合剂含量为40重量％以上的氯乙烯 - 乙酸乙烯酯 - 马来酸的共聚物，具有所述磁性层中含有6以上的莫氏硬度，所得磁带在25℃下的矫顽力为750〜900Oe。

26. 发明授权

US4686139A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4686139A
公开(公告)日：1987-08-11
申请号：US778468
申请日：1985-09-20
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Masatoshi Takahashi , Kazuko Hanai , Hideaki Kosha , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D163/00 , G11B5/73 , G11B5/735 , G11B5/68 , G11B5/708
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/30
摘要： A magnetic recording medium is described, comprising a non-magnetic support having a magnetic layer and a backing layer which is provided on the surface of the support opposite to the magnetic layer, the backing layer containing (a) non-magnetic particles comprising carbon black having an average particle diameter of 0.1 to 1.0 .mu.m, (b) a binder comprising (i) a resin having 150 kg/cm.sup.2 or less of 100% modulus in an amount of at least 50 wt % based on the total amount of binder, and (ii) a diphenyl methane diisocyanate type hardening agent, with the amount of non-magnetic particles to total contained in the backing layer being 40 to 300 parts by weight of non-magnetic particles per 100 parts by weight of binder.
摘要翻译：描述了一种磁记录介质，其包括具有磁性层的非磁性载体和设置在与磁性层相对的支撑体的表面上的背衬层，背衬层包含（a）包含炭黑的非磁性颗粒平均粒径为0.1〜1.0μm，（b）粘合剂，其包含（i）相对于粘合剂的总量为150kg / cm 2以下的100质量％以上的模量为50重量％以上的树脂，和（ii）二苯基甲烷二异氰酸酯型硬化剂，相对于每100重量份粘合剂，背衬层中总含有的非磁性颗粒的量为40〜300重量份的非磁性颗粒。

27. 发明授权

US4497864A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4497864A
公开(公告)日：1985-02-05
申请号：US511359
申请日：1983-07-06
申请人： Katsumi Ryoke , Nobutaka Yamaguchi , Takashi Yoneyama , Eiichi Tadokoro
发明人： Katsumi Ryoke , Nobutaka Yamaguchi , Takashi Yoneyama , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D7/12 , C10M105/38 , C10N40/18 , G11B5/71 , G11B5/70 , G11B5/72
CPC分类号： G11B5/71 , Y10S428/90 , Y10T428/25 , Y10T428/266 , Y10T428/27
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support base having coated thereon a magnetic layer comprised of ferromagnetic particles dispersed in a binder and further comprised of at least one anhydrosorbitol di- and/or tetra-fatty acid non-hydroxy ester. By including the particularly disclosed fatty acid non-hydroxy ester the running properties of the magnetic recording medium are greatly improved.
摘要翻译：公开了一种磁记录介质。该介质包括其上涂覆有由分散在粘合剂中的铁磁性颗粒组成的磁性层并且还包含至少一种脱水山梨糖醇二 - 和/或四脂肪酸非羟基酯的支撑基底。通过包括特别公开的脂肪酸非羟基酯，磁记录介质的运行特性大大提高。

28. 发明授权

US4880692A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4880692A
公开(公告)日：1989-11-14
申请号：US171360
申请日：1988-03-21
申请人： Katsumi Ryoke , Masatoshi Takahashi , Akihiro Hashimoto , Tsutomu Okita , Kazuko Hanai
发明人： Katsumi Ryoke , Masatoshi Takahashi , Akihiro Hashimoto , Tsutomu Okita , Kazuko Hanai
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/73 , G11B5/735
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/265
摘要： A magnetic recording medium comprising a support having provided on one surface thereof a magnetic recording layer containing ferromagnetic particles dispersed in a binder and on the other surface thereof a backing layer, wherein said binder comprises a vinyl chloride/vinyl acetate copolymer reisn containing at least one group represented by formula (I) or (II): ##STR1## wherein X represents a --COO-- group, a --CONH-- group, or a --C.sub.6 H.sub.4 -- group; x represents an integer of from 1 to 10; R.sub.1, R.sub.2, and R.sub.3 each represents a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, or an alkyl derivative having from 1 to 10 carbon atoms, or R.sub.1, R.sub.2, and R.sub.3 may be combined to each other to form a heterocycric ring; and Y.sup..crclbar. represents a halogen atom, ClO.sub.4.sup..crclbar., or HgI.sub.3.sup..crclbar. ; or Y.sup..crclbar. is bound to R.sub.2, R.sub.2 represents an alkylene group having from 1 to 10 carbon atoms, and Y.sup..crclbar. represents a --COO.sup..crclbar. group, an --SO.sub.3.sup..crclbar. group, or an --OSO.sub.3.sup..crclbar. group.
摘要翻译：一种磁记录介质，其包括在其一个表面上设置有包含分散在粘合剂中的铁磁颗粒的磁记录层和在其另一表面上的背衬层的支撑体，其中所述粘合剂包括含有至少一个的氯乙烯/乙酸乙烯酯共聚物（I）或（II）表示的基团：其中X表示-COO-基团，-CONH-基团或-C 6 H 4 - 基团; x表示1〜10的整数， R1，R2和R3各自表示氢原子，具有1至10个碳原子的烷基或具有1至10个碳原子的烷基衍生物，或者R1，R2和R3可以彼此结合形成杂环; Y（ - ）表示卤素原子，ClO 4（ - ）或HgI 3（ - ）; 或Y（ - ）与R 2结合，R 2表示具有1〜10个碳原子的亚烷基，Y（ - ）表示-COO（ - ）基，-SO 3（ - ）基或-OSO 3（ - ）组。

29. 发明授权

US4803121A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4803121A
公开(公告)日：1989-02-07
申请号：US109013
申请日：1987-10-16
申请人： Katsumi Ryoke , Masatoshi Takahashi , Toshimitu Okutu , Hideaki Kosha
发明人： Katsumi Ryoke , Masatoshi Takahashi , Toshimitu Okutu , Hideaki Kosha
IPC分类号： C09D5/23 , G11B5/708 , G11B5/70
CPC分类号： G11B5/7085 , Y10S428/90 , Y10T428/257
摘要： A magnetic recording medium is disclosed, comprising a non-magnetic support having thereon a magnetic layer comprising ferromagnetic fine particles, a binder, and .alpha.-alumina particles having an average size of from about 0.1 to 0.3 .mu.m, provided that the number of .alpha.-alumina particles having a particle size of larger than 0.05 .mu.m is at least equal to the number of .alpha.-alumina particles having a particle size of up to 0.05 .mu.m.
摘要翻译：公开了一种磁记录介质，其包括非磁性载体，其上具有包含铁磁细颗粒的磁性层，粘合剂和平均尺寸为约0.1至0.3μm的α-氧化铝颗粒，条件是α 粒径大于0.05μm的氧化铝粒子至少等于粒径达0.05μm的α-氧化铝粒子的数量。

30. 发明授权

US4758468A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4758468A
公开(公告)日：1988-07-19
申请号：US784426
申请日：1985-10-04
申请人： Masatoshi Takahashi , Katsumi Ryoke , Nobuyoshi Asada , Eiichi Tadokoro
发明人： Masatoshi Takahashi , Katsumi Ryoke , Nobuyoshi Asada , Eiichi Tadokoro
IPC分类号： C09D5/23 , C09D127/04 , C09D127/08 , C09D175/00 , C09D175/04 , G11B5/71 , G11B5/72 , G11B5/73 , G11B5/735 , G11B5/70
CPC分类号： G11B5/72 , G11B5/71 , G11B5/735 , Y10S428/90 , Y10T428/25 , Y10T428/30
摘要： The present invention relates to a magnetic recording medium which comprises a non-magnetic support having coated on opposite surfaces thereof a magnetic layer and a backing layer comprising a resin as a binder and non-magnetic particles, wherein the resin binder contains a polyurethane resin, a copolymer of vinylidene chloride and acrylonitrile, and a polyisocyanate compound; the non-magnetic particles contains fine carbon black having an average particle size of 30 to 150 m.mu. and coarse carbon black having an average particle size of 160 to 600 m.mu.; and the mixing weight ratio of the resin binder to the non-magnetic particles is within the range of 0.375:1 to 1:1 by weight. This magnetic recording medium has excellent electromagnetic properties and running durability.
摘要翻译：本发明涉及一种磁记录介质，其包括在其相对表面上涂覆有磁性层的非磁性载体和包含作为粘合剂的树脂和非磁性颗粒的背衬层，其中树脂粘合剂含有聚氨酯树脂，偏二氯乙烯和丙烯腈的共聚物和多异氰酸酯化合物; 非磁性粒子含有平均粒径为30〜150μm的细小碳黑，平均粒径为160〜600μm的粗炭黑，并且树脂粘合剂与非磁性颗粒的混合重量比在0.375:1至1:1的范围内。该磁记录介质具有优异的电磁特性和运行耐久性。

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