JPS5760531A - Binder and magnetic recording material - Google Patents

Binder and magnetic recording material

Info

Publication number
JPS5760531A
JPS5760531A JP13469580A JP13469580A JPS5760531A JP S5760531 A JPS5760531 A JP S5760531A JP 13469580 A JP13469580 A JP 13469580A JP 13469580 A JP13469580 A JP 13469580A JP S5760531 A JPS5760531 A JP S5760531A
Authority
JP
Japan
Prior art keywords
polyol
equivalent
low molecular
binder
recording material
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.)
Pending
Application number
JP13469580A
Other languages
Japanese (ja)
Inventor
Hajime Akiyama
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 JP13469580A priority Critical patent/JPS5760531A/en
Publication of JPS5760531A publication Critical patent/JPS5760531A/en
Pending 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 powder, by using a polyurethane resin consisting of a mixture between a specified macromolecular polyol and low molecular polyol including >=3 functional groups low molecular polyol, and of an aromatic polyisocyanate as a binder. CONSTITUTION:A polyurethane resin (C) can be obtd. by reacting a mixed polyol A including a macromolecular polyol (A1) 150-2,000 equivalent having 150- 2,000 equivalent of polytetramethylene glycol (a1) or including the polyol (a1) plus >=50wt% of polycaprolactone polyol, and low molecular polyol (A2) including >=3 functional groups of low molecular polyol (a2), with an aromatic polyisocyanate (B). In the polyol (a2), 1-40 equivalent % of the a2 is included in the polyol A as methylolpropane and the A2 is included in the A in 20-29 equivalent %. The NCO/OH equivalent ratio of the B to A is taken as 0.6-1.5. This resin C is used for a binder and the magnetic recording material excellent in durability can be obtd.
JP13469580A 1980-09-26 1980-09-26 Binder and magnetic recording material Pending JPS5760531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13469580A JPS5760531A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13469580A JPS5760531A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Publications (1)

Publication Number Publication Date
JPS5760531A true JPS5760531A (en) 1982-04-12

Family

ID=15134425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13469580A Pending JPS5760531A (en) 1980-09-26 1980-09-26 Binder and magnetic recording material

Country Status (1)

Country Link
JP (1) JPS5760531A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61104325A (en) * 1984-10-22 1986-05-22 Konishiroku Photo Ind Co Ltd Magnetic recording medium
EP0714696A3 (en) * 1994-12-01 1997-05-07 Freudenberg Carl Fa Adsorption filter for air and process for preparing it

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61104325A (en) * 1984-10-22 1986-05-22 Konishiroku Photo Ind Co Ltd Magnetic recording medium
JPH0568006B2 (en) * 1984-10-22 1993-09-28 Konishiroku Photo Ind
EP0714696A3 (en) * 1994-12-01 1997-05-07 Freudenberg Carl Fa Adsorption filter for air and process for preparing it

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