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1. 发明授权

US4465737A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4465737A
公开(公告)日：1984-08-14
申请号：US462179
申请日：1983-01-31
申请人： Hajime Miyatuka , Akira Kasuga , Akihiro Matsufuji , Tsutomu Sugisaki
发明人： Hajime Miyatuka , Akira Kasuga , Akihiro Matsufuji , Tsutomu Sugisaki
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , C10M105/08 , C10N40/18 , C10N50/08 , G11B5/70 , G11B5/71 , G11B5/714 , H01F10/02
CPC分类号： G11B5/71 , G11B5/714 , Y10S428/90 , Y10T428/269 , Y10T428/2982 , Y10T428/31678
摘要： A magnetic recording medium is disclosed. The medium is comprised of a support having a magnetic layer coated thereon. The magnetic layer is comprised of a ferromagnetic metal powder and a binder. The ferromagnetic metal powder has a specific surface area of not less than 30 m.sup.2 /g. The magnetic layer is further comprised of a fatty acid and a fatty acid ester in a total amount of 2 to 10 wt % based on the weight of the ferromagnetic metal powder. The proportion of the fatty acid ester is 15 to 60 wt % based on the total weight of the fatty acid and the fatty acid ester. The surface roughness of the magnetic layer is not more than 0.03.mu.. The recording medium has excellent video characteristics obtained by the use of fine metal particles having the disclosed specific surface area and by increasing the surface properties of the magnetic layer so that spacing loss between the recording or reproducing head and the recording tape is decreased and output level is increased and modulation noise is decreased so that the video S/N is increased.
摘要翻译：公开了一种磁记录介质。介质由其上涂覆有磁性层的载体组成。磁性层由铁磁金属粉末和粘合剂组成。铁磁性金属粉末的比表面积为30m 2 / g以上。磁性层进一步由脂肪酸和脂肪酸酯组成，总量为2〜10重量％，以铁磁性金属粉末的重量计。脂肪酸酯的比例相对于脂肪酸和脂肪酸酯的总重量为15〜60重量％。磁性层的表面粗糙度不大于0.03μm。记录介质具有通过使用具有公开的比表面积的细金属颗粒和通过增加磁性层的表面性质而获得的优异的视频特性，使得记录或再现头与记录带之间的间隔损耗减小并且输出水平增加了调制噪声，从而增加了视频S / N。

2. 发明授权

US4481253A Process for preparing ferromagnetic metal powder and a magnetic recording medium including the powder 失效
标题翻译：制备铁磁性金属粉末的方法和包括该粉末的磁记录介质
公开(公告)号：US4481253A
公开(公告)日：1984-11-06
申请号：US448651
申请日：1982-12-10
申请人： Akihiro Matsufuji , Shizuo Umemura , Akira Kasuga , Hajime Miyatuka , Goro Akashi
发明人： Akihiro Matsufuji , Shizuo Umemura , Akira Kasuga , Hajime Miyatuka , Goro Akashi
IPC分类号： B22F9/22 , G11B5/706 , H01F1/06 , H01F10/02
CPC分类号： B22F9/22 , G11B5/70615 , H01F1/065 , Y10S428/90 , Y10T428/25 , Y10T428/265 , Y10T428/266 , Y10T428/31678
摘要： A process for preparing a ferromagnetic metal powder and a magnetic recording medium utilizing that powder are disclosed. The ferromagnetic metal powder is prepared by heat-treating an acicular iron oxyhydroxide or an acicular iron oxide powder prepared from the acicular iron oxyhydroxide in a non-reducing gas at a temperature of from 300.degree. C. to 1000.degree. C. or in a reducing gas at a temperature of from 150.degree. C. to 500.degree. C. The heat-treated material is washed and then reduced under heating. The ferromagnetic metal powder prepared in this manner is dispersed in a binder and cated on a non-magnetic base to form a magnetic recording medium. By utilizing the washing step followed by heat-treating preparing the ferromagnetic metal powder a large amount of water soluble impurities are removed from the metal powder. The metal powder produced according to this disclosed process as excellent oxidation stability and ability to resist corrosion. Accordingly, the magnetic recording medium prepared utilizing this powder has an excellent ability to resist oxidation and corrosion even when subjected to adverse conditions.
摘要翻译：公开了一种制备铁磁金属粉末和利用该粉末的磁记录介质的方法。通过在300〜1000℃的温度或非还原性气体中以非还原性气体热处理由针状羟基氧化铁制成的针状羟基氧化铁或针状氧化铁粉末，制备强磁性金属粉末。在150〜500℃的温度下进行气体洗涤。将热处理材料洗涤，然后在加热下还原。以这种方式制备的铁磁性金属粉末分散在粘合剂中并在非磁性基底上形成磁记录介质。通过利用洗涤步骤进行热处理，制备铁磁性金属粉末，从金属粉末中除去大量的水溶性杂质。根据该公开方法制备的金属粉末具有优异的氧化稳定性和耐腐蚀性。因此，利用这种粉末制备的磁记录介质即使在不利条件下也具有优异的抵抗氧化和腐蚀的能力。

3. 发明授权

US4801505A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4801505A
公开(公告)日：1989-01-31
申请号：US110294
申请日：1987-10-20
申请人： Kiyomi Ejiri , Hiroaki Araki , Akihiro Matsufuji , Akira Kasuga
发明人： Kiyomi Ejiri , Hiroaki Araki , Akihiro Matsufuji , Akira Kasuga
IPC分类号： G11B5/702 , G11B5/708 , G11B5/712
CPC分类号： G11B5/7085 , G11B5/702 , Y10S428/90 , Y10T428/25 , Y10T428/256 , Y10T428/257 , Y10T428/2991 , Y10T428/2993 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium contains in its magnetic recording layer a ferromagnetic metal powder containing an aluminum component in an amount of 1 to 6% by weight as alumnum metal, and an extremely hard abrasive such as .alpha.-alumina, chrome oxide, silicon carbide and silicon nitride. A magnetic recording medium preferably contains in its magnetic recording layer a binder comprising a resin component having a polar group.
摘要翻译：磁记录介质在其磁记录层中含有含有1至6重量％的铝组分的铁磁金属粉末作为金属金属，以及极硬的研磨剂如α-氧化铝，氧化铬，碳化硅和硅氮化物。磁记录介质优选在其磁记录层中含有包含具有极性基团的树脂组分的粘合剂。

4. 发明授权

US4411956A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4411956A
公开(公告)日：1983-10-25
申请号：US347810
申请日：1982-02-11
申请人： Akihiro Matsufuji , Akira Kasuga , Hajime Miyatsuka
发明人： Akihiro Matsufuji , Akira Kasuga , Hajime Miyatsuka
IPC分类号： C09D5/23 , G11B5/702 , H01F10/02
CPC分类号： G11B5/7022 , Y10S428/90 , Y10T428/31609 , Y10T428/31678 , Y10T428/31971
摘要： A magnetic recording medium having a non-magnetic base overlaid with a magnetic layer containing ferromagnetic particles is disclosed. The ferromagnetic particles are metal particles and the binder is composed of (a) a nitrocellulose and (b) a polyurethane resin.
摘要翻译：公开了一种具有覆盖有包含铁磁颗粒的磁性层的非磁性基底的磁记录介质。铁磁颗粒是金属颗粒，粘合剂由（a）硝化纤维素和（b）聚氨酯树脂组成。

5. 发明授权

US4784914A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4784914A
公开(公告)日：1988-11-15
申请号：US944114
申请日：1986-12-22
申请人： Akihiro Matsufuji , Akira Kasuga , Shigeo Komine , Yasuyuki Yamada , Hajime Miyatsuka
发明人： Akihiro Matsufuji , Akira Kasuga , Shigeo Komine , Yasuyuki Yamada , Hajime Miyatsuka
IPC分类号： C08G18/08 , C08L75/04 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702
CPC分类号： G11B5/7022 , C08G18/0819 , C08L75/04 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31529 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, which is characterized in that said binder is composed of a resin component comprising:a vinyl chloride copolymer containing a repeating unit having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM and --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is any one of hydrogen, an alkali metal atom and a lower hydrocarbon group, and a repeating unit having an epoxy group; anda polyurethane resin containing a repeating unit having at least one polar group selected from the group consisting of --SO.sub.3 M, --OSO.sub.3 M, --COOM and --PO(OM').sub.2, wherein M and M' have the same meanings as defined above.
摘要翻译：一种磁记录介质，包括设置在所述载体上的非磁性载体和磁记录层，所述磁记录层包含粘合剂和分散在其中的铁磁性粉末，其特征在于，所述粘合剂由树脂组分构成，所述树脂组分包括：氯乙烯含有具有至少一个选自-SO 3 M，-OSO 3 M，-COOM和-PO（OM'）2的极性基团的重复单元的共聚物，其中M是氢或碱金属原子，M'是任何一个的氢，碱金属原子和低级烃基，以及具有环氧基的重复单元; 和含有至少一个选自-SO 3 M，-OSO 3 M，-COOM和-PO（OM'）2的极性基团的重复单元的聚氨酯树脂，其中M和M'具有与上述相同的含义。

6. 发明授权

US4571364A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4571364A
公开(公告)日：1986-02-18
申请号：US649326
申请日：1984-09-10
申请人： Akira Kasuga , Akihiro Matsufuji , Yasuyuki Yamada , Nobuo Tsuji
发明人： Akira Kasuga , Akihiro Matsufuji , Yasuyuki Yamada , Nobuo Tsuji
IPC分类号： C08G18/83 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/714 , G11B5/73 , G11B5/70
CPC分类号： G11B5/714 , G11B5/7021 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/265 , Y10T428/31609 , Y10T428/31935
摘要： A magnetic recording medium is described, comprising a non-magnetic support having provided thereon a magnetic layer comprising ferromagnetic particles dispersed in a binder, said ferromagnetic particles having a BET specific surface area of 25 m.sup.2 /g or more, said binder comprising a modified polyurethane resin containing 0.1 meq/g or more of functional groups selected from carboxyl groups, hydroxyl groups, sulfonic acid groups, and epoxy groups, and containing at least three functional groups per molecule of the resin.
摘要翻译：描述了一种磁记录介质，包括其上设置有包含分散在粘合剂中的铁磁颗粒的磁性层的非磁性载体，所述铁磁性颗粒的BET比表面积为25m 2 / g以上，所述粘合剂包含改性聚氨酯含有0.1meq / g以上选自羧基，羟基，磺酸基和环氧基的官能团的树脂，每分子含有至少三个官能团的树脂。

7. 发明授权

US4431712A Magnetic recording medium of ferromagnetic particles and binder 失效
标题翻译：铁磁颗粒和粘结剂的磁记录介质
公开(公告)号：US4431712A
公开(公告)日：1984-02-14
申请号：US347619
申请日：1982-02-10
申请人： Akihiro Matsufuji , Akira Kasuga , Hajime Miyatsuka , Masashi Aonuma
发明人： Akihiro Matsufuji , Akira Kasuga , Hajime Miyatsuka , Masashi Aonuma
IPC分类号： C09D5/23 , G11B5/702 , G11B5/70
CPC分类号： G11B5/7022 , Y10S428/90
摘要： A magnetic recording medium having a non-magnetic base overlaid with a magnetic layer containing ferromagnetic particles and a binder is disclosed. The ferromagnetic particles are metal particles and the binder is composed of (a) carboxyl-containing vinyl chloride/vinyl acetate copolymer, (b) a polyurethane resin and (c) a polyisocyanate compound.
摘要翻译：公开了一种具有覆盖有含有铁磁性粒子和粘合剂的磁性层的非磁性基底的磁记录介质。铁磁颗粒是金属颗粒，粘合剂由（a）含羧基的氯乙烯/乙酸乙烯酯共聚物，（b）聚氨酯树脂和（c）多异氰酸酯化合物组成。

8. 发明授权

US5041336A Magnetic recording medium using a binder resin containing a polar group, and a lubricant system comprising two types of fatty acid esters and one fatty acid 失效
标题翻译：使用含有极性基团的粘合剂树脂的磁记录介质和包含两种脂肪酸酯和一种脂肪酸的润滑剂体系
公开(公告)号：US5041336A
公开(公告)日：1991-08-20
申请号：US251437
申请日：1988-09-30
申请人： Takao Ohya , Yasuo Nishikawa , Akihiro Matsufuji , Akira Kasuga , Kiyomi Ejiri
发明人： Takao Ohya , Yasuo Nishikawa , Akihiro Matsufuji , Akira Kasuga , Kiyomi Ejiri
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C10M105/34 , C10M105/38 , C10N40/18 , G11B5/702 , G11B5/708 , G11B5/71
CPC分类号： G11B5/71 , G11B5/702 , G11B5/7021 , G11B5/7023 , Y10S428/90 , Y10T428/31551 , Y10T428/3158 , Y10T428/31786
摘要： A magnetic recording medium comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder,wherein said binder comprises a polymer containing a polar group selected from --SO.sub.3 M, --OSO.sub.3 M, --COOM, ##STR1## where M represents a hydrogen atom, Li, Na, K or NR.sub.4 where R represents a hydrogen atom or an alkyl group, and M' represents a hydrogen atom, Li, Na, K, an alkyl group or NR.sub.4 where R represents a hydrogen atom or an alkyl group, andsaid magnetic layer contains at least one fatty acid ester compound represented by formula (I), at least one fatty acid ester compound represented by formula (II), and at least one fatty acid having from 11 to 35 carbon atoms: ##STR2## wherein R.sup.1 represents a linear or branched chain hydrocarbon group having from 11 to 35 carbon atoms, R.sup.2 represents a linear or branched chain hydrocarbon group having from 1 to 8 carbon atoms or a phenyl group, X represents a hydrogen atom or a methyl group, and n represents an integer of from 2 to 200; ##STR3## wherein R.sup.3 represents a linear or branched chain hydrocarbon group having from 11 to 35 carbon atoms and R.sup.4 represents a linear or branched chain hydrocarbon group having from 1 to 8 carbon atoms.
摘要翻译：一种包含非磁性载体的磁记录介质，其上设置有包含分散在粘合剂中的铁磁粉末的磁性层，其中所述粘合剂包含含有选自-SO 3 M，-OSO 3 M，-COOM，中的极性基团的聚合物，其中 M表示氢原子，Li，Na，K或NR4，其中R表示氢原子或烷基，M'表示氢原子，Li，Na，K，烷基或NR4，其中R表示氢原子或烷基，所述磁性层含有至少一种由式（I）表示的脂肪酸酯化合物，至少一种由式（II）表示的脂肪酸酯化合物和至少一种具有11至35个碳原子的脂肪酸（Ⅰ）其中R1表示碳原子数为11〜35的直链或支链烃基，R2表示碳原子数为1〜8的直链或支链烃基或苯基，X表示氢原子原子或甲基， n表示2〜200的整数，（II）其中R 3表示具有11至35个碳原子的直链或支链烃基，R 4表示具有1至8个碳原子的直链或支链烃基。

9. 发明授权

US4784907A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4784907A
公开(公告)日：1988-11-15
申请号：US944068
申请日：1986-12-22
申请人： Akihiro Matsufuji , Akira Kasuga , Shigeo Komine , Yasuyuki Yamada , Hajime Miyatsuka
发明人： Akihiro Matsufuji , Akira Kasuga , Shigeo Komine , Yasuyuki Yamada , Hajime Miyatsuka
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , C10M107/46 , C10N40/18 , G11B5/702 , G11B5/708 , G11B5/71
CPC分类号： G11B5/71 , G11B5/7023 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609 , Y10T428/31935
摘要： In a magnetic recording medium such as a video tape comprising a nonmagnetic support and a magnetic recording layer provided on the support, said magnetic recording layer comprising a binder and a ferromagnetic powder dispersed therein, the improvement in which:the magnetic recording layer comprises a fatty acid ester lubricant and a lubricant other than the fatty acid ester lubricant;the binder is composed of a resin component comprising a resin containing a repeating unit which has a polar group and having a glass transition point of not lower than 50.degree. C., and a resin containing a repeating unit which has a polar group and having a glass transition point of lower than 50.degree. C; andat least one resin of the resins contains a repeating unit having a polar group such as --SO.sub.3 M, --OSO.sub.3 M or --PO(OM').sub.2, wherein M is hydrogen or an alkali metal atom, and M' is hydrogen, an alkali metal atom or a lower hydrocarbon group.
摘要翻译：在诸如包括非磁性载体和设置在载体上的磁记录层的录像带的磁记录介质中，所述磁记录层包括粘合剂和分散在其中的铁磁粉末，其改进在于：磁记录层包含脂肪酸酯润滑剂和脂肪酸酯润滑剂以外的润滑剂; 粘合剂由包含含有极性基团并且玻璃化转变温度不低于50℃的重复单元的树脂的树脂组分和含有极性基团并具有极性基团的重复单元的树脂组成玻璃化转变点低于50℃; 并且所述树脂的至少一种树脂含有具有极性基团的重复单元，例如-SO 3 M，-OSO 3 M或-PO（OM'）2，其中M为氢或碱金属原子，M'为氢，碱金属原子或低级烃基。

10. 发明授权

US4687705A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4687705A
公开(公告)日：1987-08-18
申请号：US731806
申请日：1985-05-08
申请人： Hajime Miyatsuka , Akira Kasuga , Akihiro Matsufuji , Takeshi Kakuta
发明人： Hajime Miyatsuka , Akira Kasuga , Akihiro Matsufuji , Takeshi Kakuta
IPC分类号： G11B5/712 , G11B5/702
CPC分类号： G11B5/712 , Y10S428/90 , Y10T428/257 , Y10T428/2995 , Y10T428/2998
摘要： A magnetic recording medium is disclosed which comprises a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic metal particles and a binder, wherein the ferromagnetic metal particles have a specific surface area of 30 m.sup.2 /g or more, and a saturation magnetization of 120 emu/g or more and have been surface-treated with an organic compound. Also, a magnetic recording medium is disclosed which comprises a non-magnetic support having provided thereon a magnetic layer containing ferromagnetic particles and a binder, wherein the ferromagnetic particles have been surface-treated with an organic compound and the binder has essentially no functional groups which adsorb onto ferromagnetic metal particles.
摘要翻译：公开了一种磁记录介质，其包括在其上设置有含有铁磁性金属颗粒和粘合剂的磁性层的非磁性载体，其中所述强磁性金属颗粒的比表面积为30m 2 / g以上，饱和磁化强度为 120emu / g以上，并用有机化合物进行表面处理。此外，公开了一种磁记录介质，其包括在其上设置有含有铁磁颗粒和粘合剂的磁性层的非磁性载体，其中铁磁颗粒已经用有机化合物进行表面处理，并且粘合剂基本上没有官能团，吸附在铁磁性金属颗粒上。

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