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    • 1. 发明授权
    • Magnetic recording media
    • 磁记录媒体
    • US4357378A
    • 1982-11-02
    • US234708
    • 1981-02-17
    • Guenter VaethRudolf BachmannWerner SenkpielHans-Joerg HartmannRoland FalkHerbert Motz
    • Guenter VaethRudolf BachmannWerner SenkpielHans-Joerg HartmannRoland FalkHerbert Motz
    • C09D5/23G11B5/702B32B3/02
    • G11B5/7022Y10S428/90Y10T428/31605Y10T428/31609Y10T428/31699Y10T428/31935
    • The invention relates to magnetic recording media comprising a non-magnetic base and, applied thereto, a firmly adhering magnetic coating based on a finely divided magnetic pigment and a special binder mixture. This binder mixture consists essentially of 20 to 90 percent by weight of an elastomeric polyurethane which is soluble in a volatile organic solvent, is practically free of isocyanate groups and has been obtained from a linear, aliphatic polyester or polyether and a diisocyanate of 6 to 24 carbon atoms, and of 10 to 80 percent by weight of a vinyl chloride copolymer which contains 50 to 90 percent by weight of vinyl chloride units and 10 to 50 percent by weight of units of one or more diesters of maleic acid with an alcohol of 1 to 3 carbon atoms, or of the reaction product of this binder mixture with a polyisocyanate of 6 to 50 carbon atoms. Magnetic coatings containing such a binder mixture are distinguished by improved surface hardness coupled with improved orientability of the magnetic particles, as a result of which such recording media are particularly suitable for modern video- and audio-recording instruments.
    • 本发明涉及包含非磁性基底的磁记录介质,并且在其上施加基于细分磁性颜料和特殊粘合剂混合物的牢固粘附的磁性涂层。 该粘合剂混合物基本上由20至90重量%的可溶于挥发性有机溶剂的弹性体聚氨酯组成,实际上不含异氰酸酯基团,并且由线性脂族聚酯或聚醚和6至24的二异氰酸酯获得 和10至80重量%的氯乙烯共聚物,其含有50至90重量%的氯乙烯单元和10至50重量%的一种或多种马来酸二醇与醇的共聚物1 或者该粘合剂混合物与6至50个碳原子的多异氰酸酯的反应产物。 含有这种粘合剂混合物的磁性涂层的特征在于改进的表面硬度以及磁性颗粒的改进的取向性,结果这种记录介质特别适用于现代的视频和音频记录仪器。
    • 4. 发明授权
    • Magnetic recording media
    • 磁记录媒体
    • US4152484A
    • 1979-05-01
    • US819820
    • 1977-07-28
    • Rudolf BachmannHans-Joerg HartmannHerbert Motz
    • Rudolf BachmannHans-Joerg HartmannHerbert Motz
    • C08L75/04G11B5/702H01F10/02
    • G11B5/7022C08L75/04Y10S428/90Y10T428/31565Y10T428/3158Y10T428/31609Y10T428/31935
    • This invention relates to magnetic recording media comprising a non-magnetic base and a magnetic coating firmly bonded thereto, which coating consists essentially of a dispersion of a finely divided magnetic pigment in a polyurethane-containing mixture of binders. This binder mixture contains from 30 to 90% by weight of an elastomeric polyurethane which is virtually free from isocyanate groups and is soluble in a volatile organic solvent, and from 10 to 70% by weight of a vinyl chloride copolymer containing from 5 to 50% by weight of polymerized units of a monoester obtained from an aliphatic diol of from 2 to 4 carbon atoms and acrylic or methacrylic acid. Magnetic recording media having a magnetic coating containing this binder mixture are distinguished by advantageous mechanical and electrical properties, in particular by good abrasion resistance and improved packing density combined with better orientation of the magnetic particles.
    • 本发明涉及包含非磁性基体和牢固地结合到其上的磁性涂层的磁记录介质,该涂层基本上由细分散的磁性颜料在含聚氨酯的粘合剂混合物中的分散体组成。 该粘合剂混合物含有30至90重量%的基本上不含异氰酸酯基并且可溶于挥发性有机溶剂的弹性体聚氨酯,和10至70重量%的含有5至50重量% 的由2至4个碳原子的脂族二醇获得的单酯和丙烯酸或甲基丙烯酸的聚合单元。 具有包含该粘合剂混合物的磁性涂层的磁记录介质的特征在于有利的机械和电学性能,特别是通过良好的耐磨性和改善的填充密度以及磁性颗粒的更好取向的组合。
    • 6. 发明授权
    • Process for the preparation of polymerizable polyurethane elastomers
    • 制备可聚合聚氨酯弹性体的方法
    • US4334034A
    • 1982-06-08
    • US231836
    • 1981-02-05
    • August LehnerHeinrich HartmannGuenter HeilWerner LenzIngolf BuetheRudolf Bachmann
    • August LehnerHeinrich HartmannGuenter HeilWerner LenzIngolf BuetheRudolf Bachmann
    • C08G18/00C08G18/67C08G63/76C08G18/62
    • C08G18/6705C08G18/675
    • A process for the preparation of polymerizable, primarily linear thermoplastic polyurethane elastomers with acrylate side groups comprising reacting an organic polyisocyanate with a mixture of(a) an acrylate diol having a molecular weight of 146 to 3000,(b) an organic polyhydroxyl compound other than those of paragraph (a) having a molecular weight between 400 and 5000, and(c) a chain extender selected from the group consisting of diols, diamines, aminoalcohols, and triols, having molecular weights between 61 and 400, water, and mixtures thereofwherein the ratio of isocyanate to active hydrogen containing groups is from 0.8:1 to 1.2:1 and wherein 1.4 to 1.8 moles of organic polyisocyante, 0 to 15 moles of component (c) and 0.3 to 6 moles of component (a) are used per mole of component (b). The polymerizable polyurethane elastomers may be used for the manufacture of molded parts, laminates, adhesives, coatings, magnetic tapes, and other articles.
    • 一种制备具有丙烯酸酯侧基的可聚合的主要线性的热塑性聚氨酯弹性体的方法,包括使有机多异氰酸酯与(a)分子量为146至3000的丙烯酸酯二醇和(b)有机多羟基化合物的混合物 段落(a)分子量在400和5000之间的那些,和(c)分子量在61和400之间的选自二醇,二胺,氨基醇和三醇的增链剂,水及其混合物 其中异氰酸酯与含活性氢的基团的比例为0.8:1至1.2:1,并且其中使用1.4至1.8摩尔有机聚异氰酸酯,0至15摩尔的组分(c)和0.3至6摩尔的组分(a) 每摩尔组分(b)。 可聚合的聚氨酯弹性体可用于制造模制件,层压材料,粘合剂,涂料,磁带和其它制品。