JPS5760529A - Binder and magnetic recording material - Google Patents

Binder and magnetic recording material

Info

Publication number
JPS5760529A
JPS5760529A JP13469380A JP13469380A JPS5760529A JP S5760529 A JPS5760529 A JP S5760529A JP 13469380 A JP13469380 A JP 13469380A JP 13469380 A JP13469380 A JP 13469380A JP S5760529 A JPS5760529 A JP S5760529A
Authority
JP
Japan
Prior art keywords
polyol
equivalent
binder
low molecular
magnetic
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
JP13469380A
Other languages
Japanese (ja)
Other versions
JPS6310487B2 (en
Inventor
Hajime Akiyama
Kazuyoshi Tanaka
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.)
Sanyo Chemical Industries Ltd
Original Assignee
Sanyo Chemical Industries 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 Sanyo Chemical Industries Ltd filed Critical Sanyo Chemical Industries Ltd
Priority to JP13469380A priority Critical patent/JPS5760529A/en
Publication of JPS5760529A publication Critical patent/JPS5760529A/en
Publication of JPS6310487B2 publication Critical patent/JPS6310487B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • G11B5/702—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 bonding agent
    • G11B5/7021—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 bonding agent containing a polyurethane or a polyisocyanate

Landscapes

  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To increase the dispersing property and wear resistance of magnetic material by using a binder which is obtained from a macromolecular polyol including polycaprolacton polyol, low molecular polyol having >=3 functional groups, and aromatic polyisocyanate through reaction. CONSTITUTION:Polyurethane is manufactured by reacting mixed poyol A including macromolecular polyol A1 of 200-2,000 equivalent including >=50wt% polycaprolacton polyol and low molecular polyol A2 including 1-40 equivalent % of low molecular polyol of >=3 functional groups (such as trimethylolpropane) with aromatic polyisocyanate. The equivalent of the polyol A is taken as 100-1,750 and the equivalent ratio NCO/OH of the polyisocyanate and polyol A is taken as 0.6-1.5. The magnetic substance layer is formed by using this polyurethane resin as a binder. Thus, magnetic recording media excellent in dispersing property of magnetic powder, smoothness, scratch resistance and hydrolysis resistance can be obtd.
JP13469380A 1980-09-26 1980-09-26 Binder and magnetic recording material Granted JPS5760529A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13469380A JPS5760529A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13469380A JPS5760529A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Publications (2)

Publication Number Publication Date
JPS5760529A true JPS5760529A (en) 1982-04-12
JPS6310487B2 JPS6310487B2 (en) 1988-03-07

Family

ID=15134375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13469380A Granted JPS5760529A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Country Status (1)

Country Link
JP (1) JPS5760529A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126960U (en) * 1984-07-25 1986-02-18 三浦工業株式会社 Combustion control system in small boiler
JPS61158024A (en) * 1984-12-28 1986-07-17 Dainichi Seika Kogyo Kk Magnetic recording medium
JPH03150721A (en) * 1990-09-21 1991-06-27 Konica Corp Magnetic recording medium
CN1332094C (en) * 2004-02-06 2007-08-15 姜成顺 Elastic permeable road surface containing waste broken polyurethane for new road and its paving method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5483812A (en) * 1977-12-02 1979-07-04 Basf Ag Magnetic record carrier having polyurethane elastomer in magnetic layer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5483812A (en) * 1977-12-02 1979-07-04 Basf Ag Magnetic record carrier having polyurethane elastomer in magnetic layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6126960U (en) * 1984-07-25 1986-02-18 三浦工業株式会社 Combustion control system in small boiler
JPH0318839Y2 (en) * 1984-07-25 1991-04-22
JPS61158024A (en) * 1984-12-28 1986-07-17 Dainichi Seika Kogyo Kk Magnetic recording medium
JPH03150721A (en) * 1990-09-21 1991-06-27 Konica Corp Magnetic recording medium
CN1332094C (en) * 2004-02-06 2007-08-15 姜成顺 Elastic permeable road surface containing waste broken polyurethane for new road and its paving method

Also Published As

Publication number Publication date
JPS6310487B2 (en) 1988-03-07

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