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    MAGNETIC RECORDING MEDIUM HAVING POLYMERIC RADIATION CROSS-LINKING AGENT
    2.
    发明申请
    MAGNETIC RECORDING MEDIUM HAVING POLYMERIC RADIATION CROSS-LINKING AGENT 审中-公开
    具有聚合物辐射交联剂的磁记录介质

    公开(公告)号：WO1997023869A1

    公开(公告)日：1997-07-03

    申请号：PCT/US1996020124

    申请日：1996-12-17

    Applicant: IMATION CORP.

    Inventor： IMATION CORP. ,  ARUDI, Ravindra, L. ,  KUMAR, Ramesh, C.

    IPC: G11B05/702

    CPC classification number: G11B5/7022 ,  G11B5/7021 ,  G11B5/7023 ,  G11B5/7026 ,  G11B5/7028

    Abstract: The present invention provides magnetic recording media comprising a magnetic layer and optionally a backside coating provided on a substrate. At least one of the magnetic layer and the optional backside coating comprises a polymeric binder, wherein the polymeric binder is an electron beam radiation cross-linked matrix of ingredients comprising a binder polymer component and a polymeric radiation cross-linking agent. The polymeric radiation cross-linking agent comprises a plurality of (meth)acrylate-functional chain segments of formula (I), wherein B is a segment of the polymer backbone, X is a single bond or a divalent organic linking group, n has a value in the range from 2 to 6, and R is H or -CH3. The polymeric radiation cross-linking agent has a molecular weight of at least 4000 and has sufficiently high molecular flexibility to effectively cross-link the polymeric binder upon exposure of the polymeric radiation cross-linking agent to electron beam radiation.

    Abstract translation: 本发明提供磁性记录介质，其包括磁性层和任选地设置在基底上的背面涂层。 磁性层和任选的背面涂层中的至少一个包括聚合物粘合剂，其中聚合物粘合剂是包含粘合剂聚合物组分和聚合物辐射交联剂的成分的电子束辐射交联基质。 聚合物辐射交联剂包括多个式（I）的（甲基）丙烯酸酯官能链段，其中B 1是聚合物主链的一部分，X 1是单键或二价有机 连接基团，n具有2至6的范围内的值，R 9为H或-CH 3。 聚合物辐射交联剂的分子量至少为4000，并且具有足够高的分子柔性，以便在将聚合物辐射交联剂暴露于电子束辐射时有效地将聚合物粘合剂交联。

    Coatings for magnetic recording structures and production thereof
    3.
    发明公开
    Coatings for magnetic recording structures and production thereof 失效
    磁性记录结构及其生产用涂料

    公开(公告)号：EP0149483A3

    公开(公告)日：1987-05-27

    申请号：EP85100262

    申请日：1985-01-12

    Applicant: DeSOTO, INC.

    Inventor： Ansel, Robert E.

    IPC: G11B05/702 ,  C08G18/67

    CPC classification number: G11B5/7026 ,  C08G18/672 ,  C08G18/44

    Abstract: Radiation curable coating compositions, and especially electron beam-curable coating compositions, are disclosed in which magnetizable particles are dispersed in a liquid vehicle comprising an hydroxy functional diethylenically unsaturated polyurethane having the following structural formula:
    in which X is a monoethylenically unsaturated monomer initially carrying a single hydroxy group, R" is the residue of an at leat trifunctional polyol or amino alcohol linking compound, s is a number of f0.8 to 10, t is a number from 1 to 15, and Z is a diisocyanate terminated polycarbonate diol polyurethane oligomer having the following structure:
    in which R is alkylene having from 1-20 carbon atoms, R' is the residue of an alkylene diol containing from 2-12 carbon atoms, Q is the residue of an organic diisocyanate; y is at least 1, and R' and y are selected to provide a molecular weight for the polycarbonate diol reactant of from 300 to 3000.

    MAGNETIC RECORDING MEDIA
    5.
    发明申请
    MAGNETIC RECORDING MEDIA 审中-公开
    磁记录媒体

    公开(公告)号：WO1997015048A1

    公开(公告)日：1997-04-24

    申请号：PCT/KR1995000177

    申请日：1995-12-27

    Applicant: KOLON INDUSTRIES, INC. ,  PARK, Jong, Min ,  JOH, Hyeon, Soo ,  KIM, Jin, Sa

    Inventor： KOLON INDUSTRIES, INC.

    IPC: G11B05/702

    CPC classification number: G11B5/7021 ,  C09D175/04 ,  C08L75/04

    Abstract: A magnetic recording media comprising at least two independent polyurethane resins, each having a weight average molecular weight of about 10,000 to 250,000 and an acidity of about 0.1 to 70 and exhibiting high dispersibility and dispersion stability of magnetic component without using chlorine-containing binder component, which is superior in durability and scratch resistance while retaining high magnetic recording performance.

    Abstract translation: 一种包含至少两种独立的聚氨酯树脂的磁记录介质，每个独立的聚氨酯树脂的重均分子量为约10,000-250,000，酸度为约0.1-70，并且在不使用含氯粘合剂组分的情况下表现出高分散性和磁性组分的分散稳定性， 其耐久性和耐划伤性优异，同时保持高的磁记录性能。

    MAGNETIC RECORDING MEDIUM COMPRISING BINDER THAT MAY BE CURED USING BOTH ISOCYANATE AND RADIATION CURING TECHNIQUES
    6.
    发明申请
    MAGNETIC RECORDING MEDIUM COMPRISING BINDER THAT MAY BE CURED USING BOTH ISOCYANATE AND RADIATION CURING TECHNIQUES 审中-公开
    包含可能使用异氰酸酯和辐射固化技术固化的粘合剂的磁记录介质

    公开(公告)号：WO1993024924A2

    公开(公告)日：1993-12-09

    申请号：PCT/US1993004151

    申请日：1993-05-03

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  CHERNEGA, John, G. ,  MUGGEE, John, M. ,  ELLIS, Richard, J. ,  MOSBEY, Deral, T. ,  ANDERSON, Jeffrey, T.

    IPC: G11B05/702

    CPC classification number: G11B5/735 ,  G11B5/702 ,  G11B5/7022

    Abstract: A magnetic recording medium comprising a magnetizable layer provided on a nonmagnetizable support. The magnetizable layer comprises a magnetic pigment dispersed in a cured binder. The cured binder is derived from binder materials comprising: (a) a first polymer having a Tg of about 60 DEG C or more, wherein said first polymer comprises a plurality of isocyanate cross-linkable hydroxy groups and a plurality of radiation cross-linkable groups; and (b) a second polymer having a Tg of about 25 DEG C or less, wherein said second polymer comprises a plurality of isocyanate cross-linkable hydroxy groups and a plurality of radiation cross-linkable curable groups, wherein the weight ratio of the second polymer to the first polymer is in the range from 1:19 to 19:1.

    Abstract translation: 一种磁记录介质，包括设置在不可磁化载体上的可磁化层。 可磁化层包含分散在固化的粘合剂中的磁性颜料。 固化的粘合剂衍生自粘合剂材料，其包含：（a）Tg为约60℃或更高的第一聚合物，其中所述第一聚合物包含多个异氰酸酯可交联羟基和多个可辐射交联基团 ; 和（b）Tg为约25℃或更低的第二聚合物，其中所述第二聚合物包含多个异氰酸酯交联的羟基和多个可辐射的可交联的可固化基团，其中第二聚合物的重量比 聚合物与第一聚合物的摩尔比在1:19至19:1的范围内。

    NON-PLASTICIZING, HIGH GLASS TRANSITION TEMPERATURE DISPERSANTS FOR MAGNETIC MEDIA
    10.
    发明申请
    NON-PLASTICIZING, HIGH GLASS TRANSITION TEMPERATURE DISPERSANTS FOR MAGNETIC MEDIA 审中-公开
    非增塑剂，磁性介质高玻璃化转变温度分散剂

    公开(公告)号：WO1996030899A1

    公开(公告)日：1996-10-03

    申请号：PCT/US1996002804

    申请日：1996-02-28

    Applicant: MINNESOTA MINING AND MANUFACTURING COMPANY

    Inventor： MINNESOTA MINING AND MANUFACTURING COMPANY ,  KUMAR, Ramesh, C. ,  PATEL, Suman, K.

    IPC: G11B05/702

    CPC classification number: C08F230/02 ,  G11B5/7023 ,  Y10S428/90 ,  Y10T428/25 ,  Y10T428/31935

    Abstract: The present invention provides a non-halogenated vinyl oligomer wherein the oligomer comprises a plurality of pendant nitrile groups and at least one pendant dispersing group; wherein the oligomer has a glass transition temperature of about 60 to about 105 DEG C and a number average molecular weight of about 2000 to about 4000 and the equivalent weight of the dispersing group(s) is about 500 to about 50,000. The invention also provides magnetic recording media comprising these dispersants.

    Abstract translation: 本发明提供一种非卤代乙烯基低聚物，其中低聚物包括多个侧链腈基和至少一个侧链分散基团; 其中所述低聚物的玻璃化转变温度为约60至约105℃，数均分子量为约2000至约4000，分散基团的当量为约500至约50,000。 本发明还提供包含这些分散剂的磁记录介质。

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