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公开(公告)号：US4656089A
公开(公告)日：1987-04-07
申请号：US785555
申请日：1985-10-08
IPC分类号： C09D5/23 , C09D7/12 , C09D161/20 , C09D161/26 , C10M107/40 , C10N40/18 , G11B5/708 , G11B5/70
CPC分类号： G11B5/708 , Y10S428/90 , Y10T428/254 , Y10T428/256 , Y10T428/257 , Y10T428/31609
摘要： A magnetic recording medium comprising a non-magnetic base and a magnetic layer attached thereto consisting essentially of magnetic powders and a binder. Included within the binder are spherical small sized particles of a benzoguanamine-formaldehyde resin or a benzoguanamine-melamine-formaldehyde resin which serve to improve the running characteristics, reduce the friction coefficient, and improve the strength of the layer.
摘要翻译： 一种磁记录介质，包括非磁性基底和附着于其上的磁性层，其基本上由磁性粉末和粘合剂组成。 粘合剂中包含苯并胍胺 - 甲醛树脂或苯并胍胺 - 三聚氰胺 - 甲醛树脂的球形小粒子，用于提高运行特性，降低摩擦系数，提高层的强度。
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公开(公告)号：US4434210A
公开(公告)日：1984-02-28
申请号：US279726
申请日：1981-07-02
CPC分类号： G11B5/7023 , Y10S428/90 , Y10T428/2995 , Y10T428/31663
摘要： A magnetic recording medium having a magnetic layer which is cured by irradiating radiation onto the magnetic layer in which magnetic or magnetizable powder material surface-treated with a silicon compound having a silanol group and/or a silanol-forming group upon hydrolysis and a double-bond sensitive to radiation irradiated is present with a binder. The magnetic recording medium having the aforesaid structure has a sufficient durability.
摘要翻译： 一种具有磁性层的磁记录介质，该磁性层通过将辐射辐射固化在磁性层上，其中在水解时用具有硅烷醇基和/或硅烷醇形成基团的硅化合物表面处理的磁性或可磁化粉末材料， 对辐射照射敏感的粘合剂与粘合剂一起存在。 具有上述结构的磁记录介质具有足够的耐久性。
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公开(公告)号：US4521486A
公开(公告)日：1985-06-04
申请号：US396302
申请日：1982-07-08
IPC分类号： G11B5/70 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/68
CPC分类号： G11B5/7021 , Y10S428/90 , Y10T428/2998 , Y10T428/31609
摘要： The magnetic recording medium comprises a non-magnetic substrate and a magnetic layer formed thereon composed mainly of magnetic powder and a binder. The binder contains a binder component having an absorbed amount of the binder component to a surface of the magnetic powder more than 1.5 mg per square meter of a surface area of the powder measured in 3 weight % solution in methyl ethyl ketone solvent, and the magnetic layer has a pigment volume concentration of the magnetic powder between 60 and 75%.The binder provides an improved strength and high pigment volume concentration of magnetic coating layer, and improved durability of the magnetic recording medium.
摘要翻译： 磁记录介质包括非磁性基底和主要由磁性粉末和粘合剂构成的磁性层。 粘合剂含有粘合剂组分的吸附量，在磁性粉末的表面上，以甲基乙基酮溶剂的3重量％溶液中测量的粉末的表面积大于1.5mg /平方米，并且磁性 层的磁性粉末的颜料体积浓度为60〜75％。 粘合剂提供了改善的磁性涂层的强度和高颜料体积浓度，并提高了磁记录介质的耐久性。
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公开(公告)号：US4400498A
公开(公告)日：1983-08-23
申请号：US334254
申请日：1981-12-24
申请人： Shin Konishi , Mitsuhiro Yoshida , Masatake Katagiri , Masashi Somezawa , Yoshinobu Ninomiya , Akira Hashimoto
发明人： Shin Konishi , Mitsuhiro Yoshida , Masatake Katagiri , Masashi Somezawa , Yoshinobu Ninomiya , Akira Hashimoto
IPC分类号： C08G18/00 , C08G18/10 , C08G18/65 , C08G18/66 , C09D5/23 , C08G69/00 , C08G69/08 , C08G69/14
CPC分类号： C08G18/6603 , C08G18/10 , Y10S528/905
摘要： The thermoplastic polyurethane resin having a molecular weight larger than about 5,000 is obtainable by the polyaddition of a long chain diol (A) having a molecular weight ranging from about 500 to 3,000, an organic diisocyanate (C) and a short chain triol (D) having a molecular weight lower than about 500 and specified structures and, as desired, a short chain diol (B) having a molecular weight ranging from about 50 to 500, in specified ratios.The thermoplastic polyurethane resin provides particularly enhanced heat resistance and solvent resistance with improved dispersibility of a pigment or the like and other resins and favorable compatibility with a solvent or the like.
摘要翻译： 分子量大于约5,000的热塑性聚氨酯树脂可通过加成分子量范围为约500至3000的长链二醇（A），有机二异氰酸酯（C）和短链三醇（D） 具有低于约500的分子量和特定结构，并且根据需要，以规定的比例，分子量范围为约50至500的短链二醇（B）。 热塑性聚氨酯树脂提供特别提高的耐热性和耐溶剂性，改善颜料等的分散性和其它树脂以及与溶剂等的良好相容性。
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公开(公告)号：US4637959A
公开(公告)日：1987-01-20
申请号：US663377
申请日：1984-10-22
IPC分类号： C08G18/08 , C08G18/38 , C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/02 , C09D175/04 , G11B5/702 , G11B5/72
CPC分类号： C08G18/0819 , C08G18/3889 , G11B5/7021 , Y10S428/90 , Y10T428/31609
摘要： A magnetic recording medium comprised of a non-magnetic substrate and a magnetic layer formed on one surface of the substrate and consisting essentially of a binder and magnetic powders. As the binder, a thermoplastic polyurethane-urea resin is employed, in which hydrophilic polar groups are introduced. The thermoplastic polyurethane-urea resin contains urethane and urea bonds in the molecule thereof and may be synthesized from a long-chain diol with a molecular weight of about 500 to 5000, a short-chain diol with a molecular weight of about 50 to 500, an organic diisocyanate and an organic diamine. Examples of the thus introduced hydrophilic polar groups are: ##STR1##
摘要翻译： 一种磁记录介质，包括非磁性基底和形成在基底的一个表面上并且基本上由粘合剂和磁性粉末组成的磁性层的磁性层。 作为粘合剂，使用引入亲水极性基团的热塑性聚氨酯 - 脲树脂。 热塑性聚氨酯 - 脲树脂在其分子中含有氨基甲酸酯和脲键，并且可以由分子量为约500至5000的长链二醇，分子量为约50至500的短链二醇合成， 有机二异氰酸酯和有机二胺。 由此引入的亲水极性基团的实例是：
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公开(公告)号：US4634633A
公开(公告)日：1987-01-06
申请号：US678814
申请日：1984-12-06
CPC分类号： G11B5/7021 , C08G18/0819 , C08G18/671 , C08G18/675 , C08G18/8158 , Y10S428/90 , Y10T428/31609
摘要： A magnetic recording medium has a magnetic layer consisting essentially of a binder and magnetic particles on one surface of a non-magnetic substrate. The thermoplastic polyurethane-urea resin in which unsaturated bonds sensitive to radiation are introduced is used as the binder.The thermoplastic polyurethane-urea resin in which the radiation-sensitive unsaturated bonds are introduced has both urethane and urea bonds in the molecular structure thereof. It is synthesized from long chain diol with a molecular weight of approximately 500 to 5000, a short chain diol with a molecular weight of approximately 50 to 500, an organic diisocyanate, an organic diamine, and a compound containing radiation-sensitive unsaturated double bonds, and cured by radiation.The thermoplastic polyurethane-urea resin in which not only the radiation-sensitive double bonds but also hydrophilic polar groups are introduced may also be used as the binder. These hydrophilic polar groups may for example include --SO.sub.3 M, --OSO.sub.3 M, --COOM, and ##STR1##
摘要翻译： 磁记录介质具有基本由粘合剂组成的磁性层和在非磁性基底的一个表面上的磁性颗粒。 引入对辐射敏感的不饱和键的热塑性聚氨酯 - 脲树脂用作粘合剂。 其中引入辐射敏感性不饱和键的热塑性聚氨酯 - 脲树脂在其分子结构中具有氨基甲酸酯和脲键。 分子量约为500〜5000的长链二醇，分子量约为50〜500的短链二醇，有机二异氰酸酯，有机二胺，含有辐射敏感性不饱和双键的化合物， 并通过辐射治愈。 也可以使用其中不仅引入了辐射敏感双键，而且还引入亲水极性基团的热塑性聚氨酯 - 脲树脂作为粘合剂。 这些亲水极性基团可以例如包括-SO 3 M，-OSO 3 M，-COOM和
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公开(公告)号：US4734480A
公开(公告)日：1988-03-29
申请号：US60471
申请日：1987-06-11
申请人： Nobukazu Kotera , Yasuo Yoshinaka , Shinpei Yamamoto , Hideyuki Ohashi , Yoshinobu Ninomiya , Kiyokazu Oiyama
发明人： Nobukazu Kotera , Yasuo Yoshinaka , Shinpei Yamamoto , Hideyuki Ohashi , Yoshinobu Ninomiya , Kiyokazu Oiyama
CPC分类号： C08G18/672 , C08G18/10 , C08G18/4676 , C08G18/675 , G11B5/7026
摘要： A radiation curable resin which is a polyurethane acrylate having (meth)acryloyloxy groups at the terminal end of the molecule and in the molecular chain thereof, and containing metal sulfonate groups in the molecule in a ratio of 3.0 to 1,500 equivalent/10.sup.6 g of the resin, said polyurethane acrylate being obtained by reaction of(1) a copolyester having hydroxyl groups at both terminal ends of the molecule and containing metal sulfonate groups therein,(2) a diisocyanate,(3) a compound (A) having at least one (meth)acryloyloxy group and two hydroxyl groups,(4) a compound (B) having at least one (meth)acryloyloxy group and one hydroxyl group, and optionally(5) a polyol other than the above (1) or (3). the radiation curable resin containing a compound (C) having at least one carboxylic acid group and two hydroxyl groups in addition to the above components (1) to (5) is also disclosed.
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公开(公告)号：US4734330A
公开(公告)日：1988-03-29
申请号：US881285
申请日：1986-07-02
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/70 , G11B5/702 , G11B5/708
CPC分类号： G11B5/7013 , G11B5/7023 , Y10S428/90 , Y10T428/31504 , Y10T428/31935
摘要： Described is a magnetic recording medium comprising a non-magnetic substrate and a magnetic layer formed thereon composed mainly of magnetic powder and a binder, said binder containing a compound represented by a following formula: ##STR1## wherein X represents tertiary amine sulfonate or tertiary amine sulfuric ester, Y represents a monomer having vinyl group which is copolymerizable with vinyl chloride and i, j, k represent polymerization degrees.
摘要翻译： 描述了一种磁记录介质，其包括非磁性基底和主要由磁性粉末和粘合剂形成的磁性层，所述粘合剂含有由下式表示的化合物：其中X表示叔胺磺酸盐或叔胺 硫酸酯，Y表示可与氯乙烯共聚的具有乙烯基的单体，i，j，k表示聚合度。
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公开(公告)号：US4529661A
公开(公告)日：1985-07-16
申请号：US598275
申请日：1984-03-01
IPC分类号： C09D5/23 , C09D127/04 , C09D127/06 , C09D175/00 , C09D175/04 , G11B5/702 , G11B5/706 , G11B5/714 , G11B5/70
CPC分类号： G11B5/702 , Y10S428/90 , Y10T428/256 , Y10T428/257 , Y10T428/31609
摘要： A magnetic recording medium has, on a nonmagnetic support, a magnetic layer consisting mainly of an acicular iron oxide magnetic powder and a binder. In order to improve the S/N ratio, a fine magnetic powder having a specific surface area as determined by the BET method, of not less than 35 m.sup.2 /g is used. In order to improve the dispersibility of the magnetic powder and to improve the squareness ratio and durability thereof, the binder contains a resin which has a molecular weight of not more than 50,000 and has at least one polar group selected from the group consisting of polar groups having the general formulas: ##STR1## (wherein M is hydrogen, lithium, sodium or potassium; and M.sub.1 and M.sub.2 are hydrogen, lithium, sodium, potassium or alkyl groups.)
摘要翻译： PCT No.PCT / JP83 / 00210 Sec。 371日期1984年3月1日 102（e）日期1984年3月1日PCT提交1983年7月1日PCT公布。 出版物WO84 / 日期1984年1月19日。磁记录介质在非磁性载体上具有主要由针状氧化铁磁粉和粘合剂组成的磁性层。 为了提高S / N比，使用BET法测定的比表面积为35m 2 / g以上的细小磁铁粉末。 为了提高磁粉的分散性，提高矩形度和耐久性，粘合剂含有分子量不大于50,000的树脂，并且具有选自极性基团中的至少一种极性基团 具有以下通式：其中M为氢，锂，钠或钾; M1和M2为氢，锂，钠，钾或烷基。
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公开(公告)号：US4368238A
公开(公告)日：1983-01-11
申请号：US334255
申请日：1981-12-24
IPC分类号： C08G18/00 , C08G18/10 , C08G18/12 , C08G18/65 , C08G18/66 , C09D5/23 , C09D175/04 , G11B5/702 , G11B5/708 , H01F10/02
CPC分类号： G11B5/7021 , C08G18/10 , C08G18/12 , C08G18/6603 , C09D175/04 , Y10S428/90 , Y10T428/31511 , Y10T428/31609 , Y10T428/31794 , Y10T428/31935 , Y10T428/31971
摘要： The magnetic recording medium contains as a binder a thermoplastic polyurethane resin having a molecular weight larger than about 5,000 and produced by the polyaddition of a long chain diol (A) having a molecular weight ranging from about 500 to 3,000, an organic diisocyanate (C) and a short chain triol (D) having a molecular weight lower than about 500 and specified structures and, as desired, a short chain diol (B) having a molecular weight ranging from about 50 to 500, in specified ratios. The binder may contain a nitrocellulose, a vinyl chloride resin, a polyvinyl butyral, a bisphenol A type polyether or a vinyl chloride-hydroxy carboxylate copolymer as a binder component.The binder provides particularly enhanced heat resistance and solvent resistance with improved dispersibility of a pigment or the like and other resins and favorable compatibility with a solvent or the like.
摘要翻译： 磁记录介质含有作为粘合剂的分子量大于约5,000的热塑性聚氨酯树脂，并通过加成分子量范围为约500-3000的长链二醇（A），有机二异氰酸酯（C） 和具有分子量低于约500的短链三醇（D）和特定结构，并且根据需要，具有指定比例的分子量范围为约50至500的短链二醇（B）。 粘合剂可以含有硝化纤维素，氯乙烯树脂，聚乙烯醇缩丁醛，双酚A型聚醚或氯乙烯 - 羟基羧酸酯共聚物作为粘合剂组分。 粘合剂提供特别增强的耐热性和耐溶剂性，改善颜料等的分散性和其它树脂以及与溶剂等的良好相容性。
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