公开(公告)号：US06037070A

公开(公告)日：2000-03-14

申请号：US883903

申请日：1997-06-27

申请人： Katsuhiko Meguro ,  Hiroshi Hashimoto

发明人： Katsuhiko Meguro ,  Hiroshi Hashimoto

IPC分类号： G11B5/702

CPC分类号： G11B5/7023 ,  G11B5/7021 ,  G11B5/7022 ,  Y10S428/90

摘要： A poor solvent is used for removing low molecular weight components from a binder, which has weight average molecular weight within the range of 10,000 to 60,000, said poor solvent has a solubility parameter being different from solubility parameter of the binder by more than 1.3 and less than 2.3 and is a solvent such as acetonitrile having no active hydrogen, and a difference between solubility parameter of the solvent in the solution after mixing and solubility parameter of the binder is more than 1.0 and less than 2.0, said poor solvent is used for fractional precipitation, and the poor solvent being by 0.5 to 3 times as much as the quantity of the binder solution is added to separate the solution to a liquid phase where low molecular weight components are dissolved more and a liquid layer where high molecular weight components are dissolved more and the latter is taken up, or an ultrafiltration membrane is used to remove low molecular weight components, content of the low molecular weight components having molecular weight of not more than 5,000 are reduced to not more than 3 weight % of total weight of the binder, and said binder is used for formation of a magnetic layer and a lower coating layer of a magnetic recording medium.

摘要翻译： 使用不良溶剂从粘合剂中除去低分子量组分，其重均分子量在10,000至60,000范围内，所述不良溶剂的溶解度参数不同于粘合剂的溶解度参数大于1.3以下 不含活性氢的溶剂如乙腈，混合后的溶剂溶解度参数与粘合剂溶解度参数的差异大于1.0，小于2.0时，所用的不良溶剂用于分级 沉淀，不良溶剂为加入粘合剂溶液量的0.5-3倍，将溶液分离成液态较低分子量组分溶解的液相和溶解有高分子量组分的液体层 更多的是后者被吸收，或者使用超滤膜去除低分子量成分，低分子量的含量 分子量不大于5,000的重量组分减少到不超过粘合剂总重量的3重量％，并且所述粘合剂用于磁记录介质的磁性层和下涂层的形成。

公开(公告)号：US6025456A

公开(公告)日：2000-02-15

申请号：US36692

申请日：1998-03-09

申请人： Thomas Wunsch ,  Ria Kress ,  Werner Loch ,  August Lehner ,  Albert Kohl ,  Norbert Schneider ,  Uwe Burkhardt

发明人： Thomas Wunsch ,  Ria Kress ,  Werner Loch ,  August Lehner ,  Albert Kohl ,  Norbert Schneider ,  Uwe Burkhardt

IPC分类号： C08K3/08 ,  C08G18/10 ,  C08G18/32 ,  C08G18/38 ,  C08G18/64 ,  C08G18/72 ,  C08K3/22 ,  C08L75/00 ,  C08L75/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC分类号： G11B5/7021 ,  C08G18/10 ,  C08G18/3203 ,  C08G18/3831 ,  C08G18/3889 ,  C08G18/3893 ,  C08G18/6415 ,  C08L75/04

摘要： Hydroxyl-containing polyurethanes I are composed essentially ofa) a diisocyanate of 6 to 30 carbon atoms (component II),b) a component III comprising.alpha.) an aliphatic diol of 2 to 20 carbon atoms or.beta.) an aromatic-aliphatic or aromatic-cycloaliphatic diol of 8 to 30 carbon atoms having nonphenolic hydroxyl groups as hydroxyl groups of the diol andc) a polyhydric alcohol having at least 3 hydroxyl groups, 3 to 18 carbon atoms and nonphenolic hydroxyl groups as hydroxyl groups of the alcohol (component IV),the amounts of components II to IV being such that the total number of nonphenolic hydroxyl groups is from 1.1 to 5.0 per isocyanate group of II.The polyurethanes can be used as binders or binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

摘要翻译： 含羟基的聚氨酯I主要由a）6至30个碳原子的二异氰酸酯（组分II）组成，b）组分III，其包含α）2至20个碳原子的脂族二醇或β）芳族 - 脂族或芳族 具有非酚羟基作为二醇的羟基的碳原子数8〜30的环脂族二醇，c）具有至少3个羟基，3〜18个碳原子的多元醇和作为醇的羟基的非酚羟基（成分IV ），组分II至IV的量使得每个异氰酸酯基团II的非酚羟基的总数为1.1至5.0。 聚氨酯可以用作含颜料的涂料的粘合剂或粘合剂组分，特别是用于生产磁记录材料。

公开(公告)号：US5972515A

公开(公告)日：1999-10-26

申请号：US852287

申请日：1997-05-07

申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto

发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto

IPC分类号： C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： The present invention provides a magnetic recording medium, which has high dispersion property, high breaking extension and excellent running durability. The magnetic recording medium comprises a magnetic layer having at least one layer of ferromagnetic powder and a binder, said magnetic layer being placed on a non-magnetic support member, whereby said binder contains at least a polyurethane resin (A) and a polyether polyester urethane resin (B), said polyurethane resin (A) contains a polyol with molecular weight of 500 to 5,000 by 0 to 50 weight %, said polyol being obtained by adding alkylene oxide to a diol having cyclic structure, said polyurethane resin (A) also contains a diol having cyclic structure and/or a short-chain diol with molecular weight of 200 to 500 by 15 to 50 weight %, said short-chain diol being obtained by adding alkylene oxide to diol, said polyurethane resin contains ether groups obtained from said diol and said polyol by 1.0 to 5.0 mmol/g to the total quantity of the polyurethane resin.

摘要翻译： 本发明提供一种具有高分散性，高断裂延伸性和优异的运行耐久性的磁记录介质。 磁记录介质包括具有至少一层铁磁性粉末和粘合剂层的磁性层，所述磁性层位于非磁性支撑构件上，由此所述粘合剂至少含有聚氨酯树脂（A）和聚醚聚酯聚氨酯 树脂（B），所述聚氨酯树脂（A）含有分子量为500〜5000的比例为0〜50重量％的多元醇，所述多元醇通过在具有环状结构的二醇中添加环氧烷而得到，所述聚氨酯树脂（A） 含有具有环状结构的二醇和/或分子量为200〜500的15〜50重量％的短链二醇，所述短链二醇通过向二醇中加入环氧烷而得到，所述聚氨酯树脂含有由 所述二醇和所述多元醇相对于聚氨酯树脂的总量为1.0-5.0mmol / g。

公开(公告)号：US5968658A

公开(公告)日：1999-10-19

申请号：US982436

申请日：1997-12-02

申请人： Ria Kress ,  Albert Kohl ,  August Lehner ,  Werner Lenz ,  Michael Hitzfeld

发明人： Ria Kress ,  Albert Kohl ,  August Lehner ,  Werner Lenz ,  Michael Hitzfeld

IPC分类号： C09D5/23 ,  G11B5/702

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： Magnetic recording media contain a nonmagnetic substrate and a magnetizable layer, the magnetizable layer containing ferromagnetic pigments and a system of polymeric materials, wherein the system of polymeric materials containsa) from 3 to 35% by weight of a polymer containing ionic or ionogenic groupsb) from 5 to 97% by weight of a polymer XIV which contains basic groups, and has a molecular weight of from 30000 to 2000000.

摘要翻译： 磁记录介质包含非磁性基底和可磁化层，可磁化层含有铁磁性颜料和聚合物材料体系，其中聚合材料体系包含a）3至35重量％的含有离子或离子型基团的聚合物b ）5〜97重量％的含有碱性基团的聚合物XIV，分子量为30000〜2000000。

公开(公告)号：USRE36271E

公开(公告)日：1999-08-17

申请号：US903353

申请日：1992-06-24

申请人： Hiroo Inaba ,  Shinji Saito ,  Hiroshi Ogawa

发明人： Hiroo Inaba ,  Shinji Saito ,  Hiroshi Ogawa

IPC分类号： G11B5/702 ,  C09D5/23 ,  G11B5/708 ,  G11B5/716 ,  G11B23/00

CPC分类号： G11B5/708 ,  G11B5/716 ,  Y10S428/90 ,  Y10T428/24967 ,  Y10T428/257 ,  Y10T428/265 ,  Y10T428/30

摘要： A magnetic recording medium comprises a non-magnetic support having provided thereon a lower magnetic layer having a thickness of 2.5 .mu.m or higher and an upper magnetic layer having a thickness of 2 .mu.m or lower in this order, wherein both the upper and lower magnetic layers contain ferromagnetic particles, and the lower magnetic layer contains carbon black having an average primary particle diameter of less than 20 .mu.m in the amount of from 1.0 to 20 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the lower magnetic layer, and the upper magnetic layer contains carbon black having an average primary particle diameter of at least 40 .mu.m but less than 80 .mu.m in an amount of from 0.1 to 10.0 parts by weight per 100 parts by weight of the ferromagnetic particles contained in the upper magnetic layer, but less than the amount of carbon black used in the lower magnetic layer.

摘要翻译： 磁记录介质包括具有厚度为2.5μm或更高的下磁性层和厚度为2μm或更小的上磁层的非磁性载体，其中上和下两个 磁性层含有铁磁性粒子，下部磁性层含有平均一次粒径小于20μm的碳黑，相对于100重量份以下的铁磁性粒子为100重量份，1.0〜20重量份 磁性层，上部磁性层含有平均一次粒径为40μm以上且小于80μm的碳黑，相对于100重量份含有的铁磁性粒子，为0.1〜10.0重量份 在上磁性层中，但低于下磁性层中使用的炭黑的量。

公开(公告)号：US5922469A

公开(公告)日：1999-07-13

申请号：US839703

申请日：1997-04-15

申请人： Thomas Wunsch ,  Gregor Brodt ,  Ria Kress ,  Norbert Schneider ,  Albert Kohl ,  August Lehner ,  Werner Balz

发明人： Thomas Wunsch ,  Gregor Brodt ,  Ria Kress ,  Norbert Schneider ,  Albert Kohl ,  August Lehner ,  Werner Balz

IPC分类号： C08G18/12 ,  C08G18/61 ,  C08G18/65 ,  C08G18/66 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  B32B27/40

CPC分类号： G11B5/7021 ,  C08G18/12 ,  C08G18/61 ,  C08G18/6517 ,  C08G18/6535 ,  C08G18/6637 ,  Y10S428/90 ,  Y10T428/31609

摘要： Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting1) a polyurethane (II) comprisinga) 1 mol of a diol (III) having an average molecular weight of from 400 to 4000,b) from 0.3 to 9 mol of an aliphatic or cycloaliphatic diol (IV) of 2 to 18 carbon atoms,c) from 0.3 to 9 mol of an aromatic diol (V) of 8 to 30 carbon atoms,d) from 0.01 to 1 mol of a trihydric alcohol (VI) of 3 to 18 carbon atoms,e) from 0.001 to 1 mol of a polyhydric alcohol (VII) of 3 to 14 carbon atoms which contains a tertiary amino group andf) an amount of a diisocyanate (VIII) of 6 to 30 carbon atoms such that the molar ratio of the isocyanate groups to the total number of hydroxyl groups in (III) to (VII) is from 1.05:1 to 1.4:1with2) a compound (IX) which contains one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups, the amount of (IX) being such that the number of reactive amino groups corresponds to the number of isocyanate groups in the polyurethane (II).The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

摘要翻译： 制备平均分子量为4000〜30,000的材料（I），其可通过使1）包含a）1摩尔平均分子量为400至4000的二醇（III）的聚氨酯（II）得到，b） 2〜18个碳原子的脂肪族或脂环族二醇（Ⅳ）为0.3〜9摩尔，c）0.3〜9摩尔碳原子数为8〜30的芳香族二醇（Ⅴ），d）0.01〜1摩尔 3〜18个碳原子的三元醇（Ⅵ），e）0.001〜1摩尔含有叔氨基的3〜14个碳原子的多元醇（Ⅶ），f）二异氰酸酯（Ⅷ） （III）至（VII）中的异氰酸酯基团与羟基的总摩尔比为1.05:1至1.4:1，其中2）含有一个或多个的化合物（IX） 或更多的羟基和一个或多个对异氰酸酯基反应的氨基，（IX）的量使得反应性氨基的数量对应于数目o 聚氨酯（II）中的异氰酸酯基团。 这些材料可以用作含颜料的涂料的可交联粘合剂组分，特别是用于生产磁记录材料。

公开(公告)号：US5795645A

公开(公告)日：1998-08-18

申请号：US617555

申请日：1996-03-19

申请人： Masatoshi Takahashi ,  Nobuyoshi Asada ,  Hiroshi Hashimoto ,  Masashi Aonuma

发明人： Masatoshi Takahashi ,  Nobuyoshi Asada ,  Hiroshi Hashimoto ,  Masashi Aonuma

IPC分类号： C09D5/23 ,  C09D171/00 ,  C09D171/12 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702 ,  G11B5/706

CPC分类号： G11B5/70621 ,  G11B5/7022 ,  Y10S428/90 ,  Y10T428/24975 ,  Y10T428/25 ,  Y10T428/256 ,  Y10T428/31609

摘要： A magnetic recording medium is disclosed, comprising a magnetic layer comprising a ferromagnetic powder and a binder provided on one side of a non-magnetic support and a backing layer provided on another side of said non-magnetic support, wherein said ferromagnetic powder is a ferromagnetic metal powder comprising Fe as a main component Co and containing Y in an amount of from 1 to 5 atm-% based on the total weight of Fe and Co in said ferromagnetic metal powder, and said binder comprises a polyurethane mainly comprising a diol component composed of a polyether polyol and a polyester polyol and a polyisocyanate component.

摘要翻译： 公开了一种磁记录介质，其包括磁性层，该磁性层包括铁磁粉末和设置在非磁性载体的一侧上的粘合剂和设置在所述非磁性载体的另一侧上的背衬层，其中所述铁磁粉末是铁磁性的 金属粉末，其以Fe为主要成分Co，以所述强磁性金属粉末中的Fe和Co的总重量计含有1〜5atm％的Y，所述粘合剂包含主要由二醇成分组成的聚氨酯 的聚醚多元醇和聚酯多元醇和多异氰酸酯组分。

公开(公告)号：US5750261A

公开(公告)日：1998-05-12

申请号：US674880

申请日：1996-07-03

申请人： Kenichi Kurihara ,  Masafumi Ata ,  Masataka Matsute ,  Haruo Watanabe

发明人： Kenichi Kurihara ,  Masafumi Ata ,  Masataka Matsute ,  Haruo Watanabe

IPC分类号： C08G18/79 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC分类号： G11B5/7022 ,  Y10S428/90 ,  Y10T428/31547 ,  Y10T428/31609

摘要： A magnetic recording medium comprising a non-magnetic base layer and an magnetic layer provided thereon which comprises a magnetic powder and a binder cured with a curing agent, wherein said binder has the hydroxyl group and said curing agent is a mixed polyvalent isocyanate compound comprising oligomers made of a diisocyanate monomer, wherein 50% by weight or more of said mixed compound comprises said oligomers which have polymerization degrees of 7 or less. The curing agent improves curing properties of the binder, and the magnetic recording medium produced therewith is excellent in sliding durability.

摘要翻译： 一种包含非磁性基层和设置在其上的磁性层的磁记录介质，其包含磁性粉末和用固化剂固化的粘合剂，其中所述粘合剂具有羟基，所述固化剂是包含低聚物的混合多价异氰酸酯化合物 由二异氰酸酯单体制成，其中50重量％以上的所述混合化合物包含聚合度为7以下的所述低聚物。 固化剂提高粘合剂的固化性能，由此制造的磁记录介质具有优异的滑动耐久性。

公开(公告)号：US5702821A

公开(公告)日：1997-12-30

申请号：US555447

申请日：1995-11-09

申请人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

发明人： Yuichiro Murayama ,  Masaki Satake ,  Hiroshi Hashimoto ,  Tsutomu Okita

IPC分类号： C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  G11B5/702

CPC分类号： G11B5/7021 ,  Y10S428/90 ,  Y10T428/31609

摘要： In a binder for a magnetic recording medium for forming a magnetic layer with ferromagnetic powder dispersed therein being arranged on a non-magnetic support member, whereby said binder consists of a polyurethane resin, which is a reaction product of diol and organic diisocyanate as principal materials, said polyurethane resin contains a short-chain diol having cyclic structure by 17 to 40 weight %, and said polyurethane resin contains a long-chain diol comprising 1.0 to 5.0 mmol/g of ether group to total urethane resin by 10 to 50 weight %. According to a binder for a magnetic recording medium and a magnetic recording medium using said binder of the present invention, good dispersion property, high running durability and preservation property can be obtained.

摘要翻译： 在用于形成其中分散有铁磁性粉末的磁性层的磁记录介质的粘合剂中，其布置在非磁性支撑构件上，由此所述粘合剂由作为主要材料的二醇和有机二异氰酸酯的反应产物的聚氨酯树脂 所述聚氨酯树脂含有具有17〜40重量％的环状结构的短链二醇，所述聚氨酯树脂含有长链二醇，其含有1.0〜5.0mmol / g的醚基与总聚氨酯树脂的比例为10〜50重量％ 。 根据本发明的磁记录介质用粘合剂和使用该粘合剂的磁记录介质，可以获得良好的分散性，高运行耐久性和保存性。

公开(公告)号：US5681919A

公开(公告)日：1997-10-28

申请号：US453150

申请日：1995-05-30

申请人： Charles J. Amirsakis ,  David E. Vietti ,  Daniel P. Heberer ,  Louis C. Dolmon ,  Lawrence Picchiotti

发明人： Charles J. Amirsakis ,  David E. Vietti ,  Daniel P. Heberer ,  Louis C. Dolmon ,  Lawrence Picchiotti

IPC分类号： C08G63/685 ,  C07F9/38 ,  C08G18/08 ,  C08G18/30 ,  C08G63/692 ,  C09D5/23 ,  G11B5/702

CPC分类号： C08G18/0819 ,  C08G63/6926 ,  G11B5/7021 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/31609 ,  Y10T428/31786

摘要： A magnetic recording medium is prepared by applying a magnetic coating composition onto a non-magnetic support and curing said composition, said coating composition containing ferromagnetic particles dispersed in a binder comprising a thermoplastic resin selected from the group consisting of polyurethanes and polyester wherein there is chemically bonded to said resin at least one aminoalkylphosphonate represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different oxyalkyl radicals having from 2 to 12 carbon atoms, R.sup.3 is an alkylene radical having from 1 to 12 carbon atoms, or an aralkylene radical having from 7 to 10 carbon atoms R.sup.4 is an alkyl radical having from 1 to 12 carbon atoms, a cycloalkyl radical having from 5 to 12 carbon atoms, or an aryl radical having from 6 to 12 carbon atoms wherein the aryl radical may contain a halogen atom, a hydroxyl group, or an amino group, and M.sup.+ is a metal ion or an ammonium ion.

摘要翻译： 通过将磁性涂料组合物施加到非磁性载体上并固化所述组合物来制备磁记录介质，所述涂料组合物含有分散在粘合剂中的铁磁颗粒，所述粘合剂包含选自聚氨酯和聚酯的热塑性树脂，其中存在化学 与所述树脂键合至少一种由下式表示的氨基烷基膦酸酯：其中R 1和R 2是相同或不同的具有2至12个碳原子的氧烷基，R 3是具有1至12个碳原子的亚烷基，或 具有7至10个碳原子的亚芳基R 4是具有1至12个碳原子的烷基，具有5至12个碳原子的环烷基或具有6至12个碳原子的芳基，其中芳基可以含有 卤素原子，羟基或氨基，M +是金属离子或铵离子。