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    • 2. 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。
    • 6. 发明授权
    • Magnetic recording medium and process for producing same
    • 磁记录介质及其制造方法
    • US5456977A
    • 1995-10-10
    • US53347
    • 1993-04-28
    • Kiyomi EjiriMasashi AonumaYoichi Hayata
    • Kiyomi EjiriMasashi AonumaYoichi Hayata
    • G11B5/708C09D5/23C09D7/12G11B5/70G11B5/71G11B5/716B32B5/16
    • G11B5/70G11B5/7085G11B5/716Y10T428/256Y10T428/257Y10T428/27
    • A magnetic recording medium is disclosed, comprising a nonmagnetic support having thereon a magnetic layer containing a ferromagnetic powder and a binder, wherein the magnetic layer contains at least one of .alpha.-Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 in an amount of 5 to 15% by weight based on the weight of the ferromagnetic powder, the density of at least one of .alpha.-Al.sub.2 O.sub.3 and Cr.sub.2 O.sub.3 in the surface of the magnetic layer is less than 0.25/.mu.m.sup.2, the intensity ratio of Al spectrum to Fe spectrum as determined by ESCA is in the range of 0.05 to 0.20, or the intensity ratio of Cr spectrum to Fe spectrum as determined by ESCA is in the range of 0.02 to 0.08, and the magnetic layer contains a fatty acid or a fatty acid ester, and the fatty acid or fatty acid ester is orientated in the surface of the magnetic layer. And further a process for producing the above magnetic recording medium is disclosed.
    • 公开了一种磁记录介质,其包括其上具有含有铁磁性粉末和粘合剂的磁性层的非磁性载体,其中所述磁性层含有以重量计5至15%的量的α-Al 2 O 3和Cr 2 O 3中的至少一种 铁磁粉末的重量,磁性层表面中的α-Al2O3和Cr2O3中的至少一种的密度小于0.25 /μm2,通过ESCA测定的Al光谱与Fe光谱的强度比在 或者通过ESCA测定的Cr光谱与Fe光谱的强度比在0.02〜0.08的范围内,磁性层含有脂肪酸或脂肪酸酯,脂肪酸或脂肪酸 酯定向在磁性层的表面。 并且还公开了制造上述磁记录介质的方法。