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    • 3. 发明授权
    • Magnetic recording medium
    • 磁记录介质
    • US4959263A
    • 1990-09-25
    • US195224
    • 1988-05-18
    • Masashi AonumaTsutomu OkitaHiroshi HashimotoHiroaki ArakiKiyotaka FukinoKiyomi Ejiri
    • Masashi AonumaTsutomu OkitaHiroshi HashimotoHiroaki ArakiKiyotaka FukinoKiyomi Ejiri
    • G11B5/702G11B5/712G11B5/714
    • G11B5/7026G11B5/712G11B5/714Y10S428/90Y10T428/257
    • A magnetic recording medium is described, comprising a nonmagnetic support having thereon a magnetic layer containing a binder which is cross-linkable or polymerizable by radiation irradiation and ferromagnetic particles, the ferromagnetic particles being metal or metal alloy particles mainly comprising iron having a crystal size of 300 .ANG. or less, having an atomic ratio of oxygen atoms to iron atoms of from 1.6 to 3.0 on the surface of the particles, and the magnetic layer having been irradiated with radiation, and comprising a nonmagnetic support having thereon a magnetic layer containing a binder comprising thermoplastic resins, thermosetting resins, reactive type resins and mixtures thereof and ferromagnetic particles, said ferromagnetic particles being metal or metal alloy particles mainly comprising iron having a crystal size of 250 .ANG. or less, and having an atomic ratio of oxygen atoms to iron atoms of from 1.6 to 3.0 on the surface of said particles.
    • 描述了一种磁记录介质,其包括其上具有含有可通过辐射照射和铁磁性颗粒可交联或可聚合的粘合剂的磁性层的非磁性载体,所述铁磁颗粒是主要包含具有晶体尺寸的铁的金属或金属合金颗粒 300或更小,在颗粒表面上的氧原子与铁原子的原子比为1.6至3.0,并且已经辐照辐照的磁性层,并且包含其上具有含有粘合剂的磁性层的非磁性载体 包括热塑性树脂,热固性树脂,反应型树脂及其混合物和铁磁颗粒,所述铁磁性颗粒是主要包含结晶尺寸为250或更小的铁并且具有氧原子与铁原子的原子比的金属或金属合金颗粒 在所述颗粒的表面上为1.6至3.0。
    • 8. 发明授权
    • Magnetic recording medium lubricated by a three component fatty acid
ester-fatty acid amide composition
    • 由三组分脂肪酸酯 - 脂肪酸酰胺组合物润滑的磁记录介质
    • US5091268A
    • 1992-02-25
    • US546183
    • 1990-06-29
    • Yasuo NishikawaAkira KasugaTsutomu OkitaMasashi Aonuma
    • Yasuo NishikawaAkira KasugaTsutomu OkitaMasashi Aonuma
    • G11B5/708C09D5/23C09D127/04C09D127/06C09D175/06C10M105/34C10M105/68C10N40/18G11B5/71G11B5/725G11B5/73
    • G11B5/725G11B5/71Y10S428/90
    • A novel magnetic recording medium is provided comprising a non-magnetic support having provided thereon a magnetic layer comprising a ferromagnetic powder dispersed in a binder, wherein at least one fatty acid amide compound represented by formula (I), at least one fatty acid ester represented by formula (II) and at least one fatty acid ester represented by formula (III) are provided in or on the magnetic layer: ##STR1## wherein R.sup.1 represents a C.sub.13-21 straight-chain saturated hydrocarbon group; ##STR2## wherein R.sup.2 represents a C.sub.12-21 straight-chain or branched saturated or unsaturated hydrocarbon group; and R.sup.3 represents a C.sub.1-10 straight-chain or branched saturated or unsaturated hydrocarbon group; ##STR3## wherein R.sup.4 represents a C.sub.12-21 straight-chain or branched saturated or unsaturated hydrocarbon group; R.sup.5 represents a C.sub.2-3 divalent hydrocarbon group; R.sup.6 represents a C.sub.1-10 straight-chain or branched saturated or unsaturated hydrocarbon group; and n represents an integer of from 1 to 10 where n may be the same or different when the magnetic layer contains two or more compounds represented by formula (III).
    • 提供了一种新颖的磁记录介质,其包括非磁性载体,其上设置有包含分散在粘合剂中的铁磁粉末的磁性层,其中至少一种由式(I)表示的脂肪酸酰胺化合物,至少一种脂肪酸酯代表 通过式(II)和至少一种由式(III)表示的脂肪酸酯提供在磁性层中或其上:其中R1表示C13-21直链饱和烃基; (II)其中R2代表C12-21直链或支链饱和或不饱和烃基; 并且R 3表示C 1-10直链或支链饱和或不饱和烃基; 其中R4代表C12-21直链或支链饱和或不饱和烃基; R5表示C2-3二价烃基; R6表示C1-10直链或支链饱和或不饱和烃基; n表示1〜10的整数,其中当磁性层含有两种或更多种由式(III)表示的化合物时,n可以相同或不同。