Urethane acrylate compositions
    52.
    发明公开
    Urethane acrylate compositions 失效
    URETHANE丙烯酸酯组合物

    公开(公告)号:EP0122611A3

    公开(公告)日:1986-03-26

    申请号:EP84104162

    申请日:1984-04-12

    Abstract: A urethane acrylate resin obtained by reacting a polyisocyanate with a polyester polyol having a molecular weight of 500 to 3,000, a low-molecular-weight polyol having a molecular weight of 60 to 400 and a hydroxyalkyl acrylate containing at least 70 mole % of a monohydroxyalkyl acrylate at an NCO/OH equivalent ratio in the range of 0.7 to 1.20. The composition comprising the above urethane acrylate resin affords crosslinked products having extremely excellent, tough physical properties, and can therefore be advantageously employed, for example, for base coatings for paper and polyethylene films prior to vacuum metallizing, protective coatings after vacuum metallizing, covering materials for electromagnetic tapes and floppy discs, vehicles for printing ink, adhesives. etc.

    Magnetic recording medium
    54.
    发明公开
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:EP0080204A3

    公开(公告)日:1985-10-02

    申请号:EP82110790

    申请日:1982-11-23

    CPC classification number: G11B5/70 G11B5/7305 Y10S428/90

    Abstract: A magnetic recording medium such as a magnetic tape, which comprises a base film, a magnetic layer having an elastic modulus at 1% elongation of not less than 1,200 kg/mm 2 totally In both longitudinal and width direction which is higher than that of the base film, said magnetic layer being formed on one surface of the base film, and a backcoat layer having an elastic modulus at 1% elongation of not less than 1,200 kg/mm 2 totally In both longitudinal and width directions which is higher than that of the base film, said backcoat layer being formed on another surface of the base film, said magnetic recording medium having a total thickness of not more than 17 µ, said magnetic recording medium having excellent mechanical strength and being used without buckle and injury during usage even in a thin thickness.

    Magnetic recording medium
    56.
    发明公开
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:EP0080205A3

    公开(公告)日:1985-07-03

    申请号:EP82110791

    申请日:1982-11-23

    CPC classification number: G11B5/7022

    Abstract: A magnetic recording medium such as a magnetic tape, which comprises a base carrier and a magnetic layer formed on the base carrier, which is characterized in that the binder for forming the magnetic layer on the base carrier comprises a combination of at least one of resins selected from the group consisting of a vinyl chloridevinyl acetate copolymer resin, a polyvinylidene chloride resins, a phenoxy resin, an acrylic resin and a fibrillar resin, and a polyurethane resin containing 15% by weight or more of 4,4'-diphenylmethane diisocyanate, and optionally an isocyanate compound having a low molecular weight, said magnetic recording medium having excellent mechanical strength, excellent electrical characteristics and durability and being used without undesirable buckle, injury, curl of edge thereof during usage even in a thin thickness.

    Abstract translation: 一种磁记录介质,例如磁带,其包括基底载体和形成在基底载体上的磁性层,其特征在于,用于在基底载体上形成磁性层的粘结剂包括至少一种树脂 选自氯乙烯乙酸乙烯酯共聚物树脂,聚偏二氯乙烯树脂,苯氧基树脂,丙烯酸树脂和纤维状树脂的组合物,以及含有15重量%以上4,4,4-三苯基甲烷二异氰酸酯的聚氨酯树脂, 和任选的具有低分子量的异氰酸酯化合物,所述磁记录介质具有优异的机械强度,优异的电特性和耐久性,并且在使用期间即使在薄的厚度下也能够使用而不需要任何扣环,损伤,边缘的卷曲。

    Magnetic recording medium
    57.
    发明公开
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:EP0090499A3

    公开(公告)日:1985-04-03

    申请号:EP83301031

    申请日:1983-02-25

    Abstract: A magnetic recording medium comprises a film of an aromatic polyamide having at least 50 mole % of recurring units represented by the following general formula:
    wherein m and n are integers of from 0 to 4, with the proviso that the case where both of m and n are 0 is excluded, and at least one high performance magnetic layer of a metal or metal compound vacuum-deposited on the aromatic polyamide film. This magnetic recording medium shows a reduced dimensional change and is substantially free of curling or breakage due to elongation, and is excellent in flatness and adhesive strength between the base film and the magnetic layer. Accordingly, this magnetic recording medium is suitable for high-density magnetic recording.

    Abstract translation: 磁记录介质包括芳族聚酰胺薄膜,其具有至少50摩尔%由以下通式表示的重复单元:其中m和n是从0到4的整数,条件是m和 排除n为0,并在该芳香族聚酰胺膜上真空沉积至少一层金属或金属化合物的高性能磁性层。 该磁记录介质显示出尺寸变化减小,并且基本上没有由于延伸导致的卷曲或断裂,并且在基膜和磁性层之间的平坦性和粘合强度优异。 因此,该磁记录介质适合于高密度磁记录。

    Magnetic recording coating composition
    59.
    发明公开
    Magnetic recording coating composition 失效
    磁记录涂料组合物

    公开(公告)号:EP0075083A3

    公开(公告)日:1983-08-17

    申请号:EP82106246

    申请日:1982-07-13

    CPC classification number: G11B5/7013 G11B5/7021

    Abstract: A magnetic recording coating composition having a high density of magnetic particles uniformly dispersed in a high performance, thermoset polyurethane resin binder with the dispersion applied as a thin coating onto a rigid substrate. The thermosetting resin binder comprises a blocked isocyanate polymer reacted with a hydroxy terminated or branched polymer. The coating composition has an extended shelf life and can be cured at temperatures below 375°F to produce a smooth, hard, though durable and well dispersed magnetic coating with an improved orientation ratio that readily accepts buffing, washing, and lubrication.

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