粉末用表面改質剤、それを含む磁性塗料および非磁性塗料、ならびに磁気記録媒体

Powder surface modifier, magnetic paint and non-magnetic paint containing the same, and magnetic recording medium

Abstract

【課題】磁性塗料中の磁性粉末等の粉末の分散性を高めるために粉末表面を改質するための手段を提供すること。析出物発生等の媒体性能劣化を起こすことなく、優れた表面平滑性を有する磁気記録媒体を提供すること。 【解決手段】下記一般式(I)で表される化合物を含む粉末用表面改質剤。非磁性支持体上に強磁性粉末および結合剤を含む磁性層を有する磁気記録媒体。前記磁性層は、下記一般式(I)で表される化合物を更に含む。 [一般式(I)中、R 1 はアルキル基またはアリール基を表し、R 2 は水酸基またはアリール基を表す。] 【選択図】なし
<P>PROBLEM TO BE SOLVED: To provide a means for modifying the surface of powder in order to improve the dispersibility of the powder such as magnetic powder etc. in a magnetic paint, and to provide a magnetic recording medium having excellent surface smoothness without causing deterioration of medium performance such as the occurrence of sludge. <P>SOLUTION: A powder surface modifier contains a compound expressed by a formula (I). The magnetic recording medium has a magnetic layer containing ferromagnetic powder and a binder on a nonmagnetic support. The magnetic layer further contains the compound expressed by the formula (I). In the formula (I), R<SP>1</SP>represents an alkyl group or an aryl group, and R<SP>2</SP>represents a hydroxyl group or an aryl group. <P>COPYRIGHT: (C)2010,JPO&INPIT

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Patent Citations (2)

    Publication numberPublication dateAssigneeTitle
    JP-2003331413-ANovember 21, 2003Hitachi Maxell Ltd, 日立マクセル株式会社Magnetic tape
    JP-2005248063-ASeptember 15, 2005Toyo Ink Mfg Co Ltd, 東洋インキ製造株式会社ウレタンウレア樹脂の製造方法

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Cited By (5)

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    JP-2012203956-AOctober 22, 2012Fujifilm Corp, 富士フイルム株式会社Method of manufacturing hexagonal ferrite magnetic powder, magnetic recording medium and method of manufacturing the same
    JP-2017045501-AMarch 02, 2017富士フイルム株式会社, Fujifilm Corp磁気記録媒体
    US-8840802-B2September 23, 2014Fujifilm CorporationMethod of manufacturing hexagonal ferrite magnetic powder, magnetic recording medium and method of manufacturing the same
    US-9583129-B2February 28, 2017Fujifilm CorporationMethod of manufacturing magnetic recording medium
    WO-2015198514-A1December 30, 2015ソニー株式会社Magnetic recording medium