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    • 1. 发明申请
    • MAGNETIC RECORDING MEDIUM
    • 磁记录介质
    • US20100239891A1
    • 2010-09-23
    • US12729884
    • 2010-03-23
    • Kazufumi OMURAMasami Sato
    • Kazufumi OMURAMasami Sato
    • G11B5/708
    • G11B5/7013G11B5/73
    • An aspect of the present invention relates to a magnetic recording medium comprising a magnetic layer comprising a ferromagnetic powder and a binder on a nonmagnetic support, wherein the magnetic layer comprises compound A and/or a ring-opened product of compound A. Another aspect of the present invention relates to a magnetic recording medium comprising a nonmagnetic layer comprising a nonmagnetic powder and a binder and a magnetic layer comprising a ferromagnetic powder and a binder in this order on a nonmagnetic support, wherein the nonmagnetic layer comprises compound A and/or a ring-opened product of compound A. Compound A comprises a lactone ring substituted with at least one polar group selected from the group consisting of a hydroxyl group, a carboxyl group, and an amino group, or substituted with a substituent comprising the above polar group.
    • 本发明的一个方面涉及一种磁记录介质,其包括在非磁性载体上包含铁磁粉末和粘合剂的磁性层,其中所述磁性层包含化合物A和/或化合物A的开环产物。另一方面 本发明涉及一种在非磁性载体上依次包含非磁性粉末和粘合剂的非磁性层和包含铁磁粉末和粘合剂的磁性层的磁性记录介质,其中非磁性层包含化合物A和/或 化合物A的开环产物。化合物A包含被至少一个选自羟基,羧基和氨基的极性基团取代或被包含上述极性基团的取代基取代的内酯环 。
    • 5. 发明申请
    • SULFONIC ACID POLYOL COMPOUND, POLYURETHANE RESIN, POLYURETHANE RESIN FOR MAGNETIC RECORDING MEDIUM, AND MAGNETIC RECORDING MEDIUM
    • 硫酸多元醇化合物,聚氨酯树脂,磁性记录介质的聚氨酯树脂和磁记录介质
    • US20090087687A1
    • 2009-04-02
    • US12235709
    • 2008-09-23
    • Kazufumi OMURAMasahiko MoriKatsumi ArakiMasataka Yoshizawa
    • Kazufumi OMURAMasahiko MoriKatsumi ArakiMasataka Yoshizawa
    • G11B5/706C07C381/00C08L75/04
    • G11B5/7021C07C309/14C08G18/0828C08G18/3215C08G18/3857C08G18/4676G11B5/714
    • A compound represented by the Formula below is provided.(in Formula (1), X denotes a divalent linking group, R1 and R2 independently denote an alkyl group having 3 or more carbons and having at least one hydroxy group or an aralkyl group having 8 or more carbons and having at least one hydroxy group, the alkyl group and aralkyl group may have a substituent, and M denotes a hydrogen atom or a cation). There is also provided a polyurethane resin obtained by polymerization of a polyisocyanate and a polyol that includes the compound. There is also provided a magnetic recording medium that includes a non-magnetic support and, above the support, at least one magnetic layer including a ferromagnetic powder dispersed in a binder that includes the polyurethane resin. There is also provided a magnetic recording medium that includes a non-magnetic support, above the support at least one non-magnetic layer including a non-magnetic powder dispersed in a binder (1), and, above the non-magnetic layer, at least one magnetic layer having a ferromagnetic powder dispersed in a binder (2), in which binder (1) and/or binder (2) is the polyurethane resin.
    • 提供由下式表示的化合物。 (式(1)中,X表示二价连接基团,R 1和R 2分别表示碳原子数3以上且具有至少1个羟基或碳数8以上的芳烷基且具有至少1个羟基的烷基 烷基和芳烷基可以具有取代基,M表示氢原子或阳离子)。 还提供了通过聚合多异氰酸酯和包含该化合物的多元醇获得的聚氨酯树脂。 还提供了一种磁记录介质,其包括非磁性载体,并且在载体上方,至少包括分散在包含聚氨酯树脂的粘合剂中的铁磁粉末的磁性层。 还提供了一种磁记录介质,其包括非磁性载体,在载体上方至少一个包含分散在粘合剂(1)中的非磁性粉末的非磁性层,以及非磁性层上方,在 至少一个具有分散在粘合剂(2)中的铁磁粉末的磁性层,其中粘合剂(1)和/或粘合剂(2)是聚氨酯树脂。
    • 7. 发明申请
    • VINYL POLYMER AND USAGE THEREOF
    • 乙烯聚合物及其用途
    • US20120295135A1
    • 2012-11-22
    • US13475031
    • 2012-05-18
    • Kazufumi OMURA
    • Kazufumi OMURA
    • G11B5/702C08F8/34
    • G11B5/7013C08F8/32C08F8/36G11B5/7023
    • An aspect of the present invention relates to a method of manufacturing a vinyl polymer, which comprises: mixing a first liquid and a second liquid to conduct an addition reaction, wherein the first liquid has been obtained by reacting a sulfonic acid group-containing compound selected from the group consisting of taurine, N-methyl taurine, and meta-aminobenzenesulfonic acid with an alkali metal hydroxide in methanol, the second liquid comprises a vinyl polymer having an intramolecular epoxy group in a ketone solvent, and the addition reaction incorporates a sulfonic acid alkali metal salt group onto a side chain of the vinyl polymer.
    • 本发明的一个方面涉及一种乙烯基聚合物的制造方法,其包括:将第一液体和第二液体混合以进行加成反应,其中所述第一液体是通过使选择了含磺酸基的化合物 来自由牛磺酸,N-甲基牛磺酸和间氨基苯磺酸与甲醇中的碱金属氢氧化物组成的组,第二液体包括在酮溶剂中具有分子内环氧基的乙烯基聚合物,加成反应包含磺酸 碱金属盐基团在乙烯基聚合物的侧链上。