JPS60184576A - 磁性塗料組成物 - Google Patents

磁性塗料組成物

Info

Publication number
JPS60184576A
JPS60184576A JP59039941A JP3994184A JPS60184576A JP S60184576 A JPS60184576 A JP S60184576A JP 59039941 A JP59039941 A JP 59039941A JP 3994184 A JP3994184 A JP 3994184A JP S60184576 A JPS60184576 A JP S60184576A
Authority
JP
Japan
Prior art keywords
magnetic
iron carbide
acicular particles
action
coercive force
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP59039941A
Other languages
English (en)
Other versions
JPH0352500B2 (ja
Inventor
Yoshiyuki Shibuya
吉之 渋谷
Shigeo Daimon
大門　茂男
Kazuo Okamura
和夫 岡村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Daikin Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd, Daikin Kogyo Co Ltd filed Critical Daikin Industries Ltd
Priority to JP59039941A priority Critical patent/JPS60184576A/ja
Priority to CA000474656A priority patent/CA1340138C/en
Priority to KR1019850001121A priority patent/KR870001947B1/ko
Priority to EP85102271A priority patent/EP0154903B1/en
Priority to DE8585102271T priority patent/DE3561087D1/de
Publication of JPS60184576A publication Critical patent/JPS60184576A/ja
Priority to US06/935,083 priority patent/US5346758A/en
Publication of JPH0352500B2 publication Critical patent/JPH0352500B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/10—Metal compounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • G11B5/70668—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • Y10T428/257—Iron oxide or aluminum oxide
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Powder Metallurgy (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は磁性塗料組成物に関する。
一般に磁性塗料組成物には磁性粉末以外にパイングー（
ｋＩ脂；滑剤；アルミナ、炭化ケイ素等の研摩剤；カー
ボン、界面活性剤等の導電剤；カーボン等の着色剤など
が配合されている。しかし上記各様の添加剤はいずれも
磁化量を有しないため、この磁性塗料を塗布した磁気記
録媒体の磁束密度を低下さぜるという欠点を有している
。
本発明者は上記欠、αに鑑み、研摩作用、導電作用、７
１色作用を有し、」１つ優れた保磁力及び磁化量を併せ
有する添加剤につぎ鋭意研究を行った。
しかし上記特性を有する添加剤であっても、その保磁力
を自由にコントロールすることができない添加剤であれ
ば、添加される主たる磁性材料と混合して得られる磁性
塗料は再生、消去、転写等の特性１こ悪’Ａｋ　’！４
を及ぼすことがある。
本発明の目的は研摩剤、導電剤、着色剤等の槻能をイｊ
し、且っｆｇれた保磁力及び磁化量を有する添加剤を配
合した磁性塗料組成物を提供することにある。
また本発明の目的は主たる磁性材料の有する保磁力に合
わせて自由にその保磁力をコントロールとのできる添加
剤を配合した磁性塗料組成物を提供することにある。
本発明は炭化鉄を含有する針状粒子を添加したことを特
徴とする磁性塗料組成物に係る。
本発明の添加剤である炭化鉄を含有する針状粒子は硬く
、電気伝導率が大きく、黒色で着色力が強い。しかもそ
の保持力を自由に調節して製造することができる。従っ
て主たる磁イク：材料の有する保磁力に合せて、添加剤
である炭化鉄を含有する針状粒子の保磁力を選択するこ
とが可能で、これにより上記再生、消去、転写等の特性
に悪影響の及ぶことを防止することができる。
本発明で１史用される炭化鉄を含有する針状粒子は例え
ば本出願人の出願に係る１、′ｉ願昭５８−１７１７６
５号に記載されたものである。その配合割合は主たる磁
性材料に対して好ましくは約０．５〜２０重呈％、より
好ましくは約１〜１０重量％とするのが良い。
本発明で使用される主たる磁性材料とじ一〇は公知の各
種のものを例示でき、例えば磁性酸化鉄、コバルト変性
酸化鉄、二酸化クロム、メタル鉄などを例示することが
できる。
また本発明の磁性塗料組成物に配合するパイングーＩＩ
Ｈ脂等の各種の成分は公知のものをそのまま使用するこ
とができ、またその製造法も公知の方法を利用すること
ができる。
以下、実施例を挙げで説明する。
参考例１ コバルト変性酸化鉄〔平均粒径（長軸）０．４μｍ０、
軸比°７、Ｈｅ　６５００ｅ、ａ、ｓ　８０ｅｍｕ７ｇ
　〕１ｓ、ｚ５．．。
α−アルミナ０．３５Ｈ、カーボン０．２５ｇ、塩化ビ
ニル／酢酸ビニル共重合体５．２５ｇ、ジオクチル７ク
レー）　１．ｏ、、ラウリン酸０．２ｇ、）ルエン］、
　５　、　Ｏｇ及びメチルエチルケトン１５．０８を使
用して調製した磁性塗料をドクターナイフ（間隙１００
μｍ０）でポリエチレンテレフタレートフィルム上に塗
布し、磁気記録媒体を得た。このものの保磁力（トｆ　
ｃ　）は６５５０ｅ、残留磁束密度（Ｂｒ）は１４８（
ｌウスであった。
実施例Ｉ 参考例１において、α−アルミナ及びカーボンの代りに
、炭化鉄を含有する針状粒子〔平均粒径（長軸）０．３
μＩ１１．軸比８、Ｈｃ　６８５０ｅ、σＳ１Ｓ１００
ｅ／ｇ）を使用した以外は同様にして磁気記録媒体を得
た。このもののＨｅは６６００ｅ、　Ｂｒ１５５０ガウ
スであった。
（以上　） 特許出願人　ダイキン工業株式会社 代　理　人　弁理士　１）村　巌 手続補正書（自発） 昭和６０年５月１２（日 特許庁長官殿 昭和５９年特許願第３９９４．１号 ２、発明の名称 磁性塗料組成物 ３、補正をする者 事件との関係　特許出願人 ダイキン工業株式会社 ４、代理人 〒５３０大阪市北区曽根崎１丁目２番８号自　発 ６、補正の対象 明細書の「発明の詳細な説明」の項 ７、補正の内容 補　正　の　内　容 １．明細書第２頁第１３行 「コン１０−ル−１の次に「するこ」を加入します。
２、明細書ｆｆ５５頁第４行の次に下記を加入しよす。
［実施例２ 参考例１において、α−アルミナ及びカーボンの代りに
、その２倍量の実施例１で゛使用した炭化鉄を含有する
針状；粒子を使用し５た以外は同様にして磁気記ｉ、ｑ
：　ｉｔ、：孔体を招だ。
このもののＨ（＝は６６００ｅ、Ｂｒは１６７０ガウス
であった。
実施例３ 参考例１においで、ａ−アルミナ及びカーボンの代りに
、その３信置の実施例１で使用した炭化鉄を含有するユ
１状粒子を使用した以外は同様にして磁気記録媒体を得
た。
このもののＨｃは６７２０ｅ、Ｂｒは１７２０ガウスで
あった。ｊ （以　上）

Claims (2)

    【特許請求の範囲】
  1. （１）炭化鉄を含有する針状粒子を添加したことを特徴
    とする磁性塗料組成物。
  2. （２）炭化鉄を含有する剣状粒子の添加量が主たる磁性
    材料に対して約０．５〜２０重量％である請求の範囲第
    １項に記載の組成物。
JP59039941A 1984-03-01 1984-03-01 磁性塗料組成物 Granted JPS60184576A (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP59039941A JPS60184576A (ja) 1984-03-01 1984-03-01 磁性塗料組成物
CA000474656A CA1340138C (en) 1984-03-01 1985-02-19 Magnetic coating composition and magnetic recording medium
KR1019850001121A KR870001947B1 (ko) 1984-03-01 1985-02-22 자기 피복 조성물 및 자기 기록 필름(磁氣被覆組成勿 및 磁氣記錄媒體)
EP85102271A EP0154903B1 (en) 1984-03-01 1985-02-28 Magnetic coating composition and magnetic recording medium
DE8585102271T DE3561087D1 (en) 1984-03-01 1985-02-28 Magnetic coating composition and magnetic recording medium
US06/935,083 US5346758A (en) 1984-03-01 1986-11-24 Magnetic coating composition and magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59039941A JPS60184576A (ja) 1984-03-01 1984-03-01 磁性塗料組成物

Publications (2)

Publication Number Publication Date
JPS60184576A true JPS60184576A (ja) 1985-09-20
JPH0352500B2 JPH0352500B2 (ja) 1991-08-12

Family

ID=12566974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59039941A Granted JPS60184576A (ja) 1984-03-01 1984-03-01 磁性塗料組成物

Country Status (6)

Country Link
US (1) US5346758A (ja)
EP (1) EP0154903B1 (ja)
JP (1) JPS60184576A (ja)
KR (1) KR870001947B1 (ja)
CA (1) CA1340138C (ja)
DE (1) DE3561087D1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211625A (ja) * 1984-04-05 1985-10-24 Tdk Corp 磁気記録媒体
US5514465A (en) * 1993-06-30 1996-05-07 Tdk Corporation Magnetic recording medium comprising a magnetic layer containing magnetic powder, an organic dye and a binder having an amino group or ammonium salt group
US5618637A (en) * 1991-11-25 1997-04-08 Tdk Corporation Magnetic recording medium

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632866A (en) * 1984-04-05 1986-12-30 Tdk Corporation Magnetic recording medium
GB2181445B (en) * 1985-10-09 1989-11-08 Tdk Corp Magnetic recording medium
US5040552A (en) * 1988-12-08 1991-08-20 Philip Morris Incorporated Metal carbide heat source
US5188130A (en) 1989-11-29 1993-02-23 Philip Morris, Incorporated Chemical heat source comprising metal nitride, metal oxide and carbon
US5247949A (en) * 1991-01-09 1993-09-28 Philip Morris Incorporated Method for producing metal carbide heat sources

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US357293A (en) * 1887-02-08 Electric cut-out
US3865627A (en) * 1972-05-22 1975-02-11 Minnesota Mining & Mfg Magnetic recording medium incorporating fine acicular iron-based particles
FR2481256A1 (fr) * 1980-04-28 1981-10-30 Rhone Poulenc Ind Particules magnetiques de coercivite elevee a base d'oxydes de fer ferrimagnetique dopees au cobalt, leurs procedes de preparation et leurs applications
JPS5920402A (ja) * 1982-07-26 1984-02-02 Fuji Photo Film Co Ltd 強磁性金属粉末
DE3240337A1 (de) * 1982-10-30 1984-05-03 Basf Ag, 6700 Ludwigshafen Nadelfoermige ferromagnetische chromdioxidteilchen
EP0123318B1 (en) * 1983-04-25 1988-03-09 Daikin Kogyo Co., Ltd. Acicular particulate material containing iron carbide
US4632866A (en) * 1984-04-05 1986-12-30 Tdk Corporation Magnetic recording medium

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60211625A (ja) * 1984-04-05 1985-10-24 Tdk Corp 磁気記録媒体
JPH0610859B2 (ja) * 1984-04-05 1994-02-09 ティーディーケイ株式会社 磁気記録媒体
US5618637A (en) * 1991-11-25 1997-04-08 Tdk Corporation Magnetic recording medium
US5514465A (en) * 1993-06-30 1996-05-07 Tdk Corporation Magnetic recording medium comprising a magnetic layer containing magnetic powder, an organic dye and a binder having an amino group or ammonium salt group

Also Published As

Publication number Publication date
US5346758A (en) 1994-09-13
EP0154903B1 (en) 1987-11-25
JPH0352500B2 (ja) 1991-08-12
KR850006202A (ko) 1985-10-02
EP0154903A1 (en) 1985-09-18
KR870001947B1 (ko) 1987-10-23
CA1340138C (en) 1998-11-24
DE3561087D1 (en) 1988-01-07

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