JPS6478421A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS6478421A
JPS6478421A JP23592987A JP23592987A JPS6478421A JP S6478421 A JPS6478421 A JP S6478421A JP 23592987 A JP23592987 A JP 23592987A JP 23592987 A JP23592987 A JP 23592987A JP S6478421 A JPS6478421 A JP S6478421A
Authority
JP
Japan
Prior art keywords
polyurethane resin
arom
durability
conjunction
polyester polyol
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
JP23592987A
Other languages
Japanese (ja)
Inventor
Kimihiko Konno
Kenji Sumiya
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Priority to JP23592987A priority Critical patent/JPS6478421A/en
Publication of JPS6478421A publication Critical patent/JPS6478421A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To improve durability by using a polyurethane resin formed by using arom. polyester polyol as a polyol component as a binder component and using magnetic powder and alumina powder in conjunction therewith. CONSTITUTION:The polyurethane resin to be used as the binder component is the polyurethane resin formed by using the arom. polyester polyol as the polyol component, for which the arom. polyester polyol contg. at least one kind among acid components such as sodium 5-sulfoisophthalate and isophthalic acid and alcohol components such as 1,4-butandiol and ethylene glycol is used. Since such polyurethane resin has good affinity to the magnetic powder, the resin improves the dispersibility of the extremely fine magnetic powder and sufficiently intensifies the coated film strength of the magnetic layer, thereby improving the durability thereof. The alumina powder to be used in conjunction with the polyurethane resin has preferably >=3.0m<2>/g BET specific surface area. The durability is additionally improved if such alumina powder is used in conjunction with the resin.
JP23592987A 1987-09-18 1987-09-18 Magnetic recording medium Pending JPS6478421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23592987A JPS6478421A (en) 1987-09-18 1987-09-18 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23592987A JPS6478421A (en) 1987-09-18 1987-09-18 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS6478421A true JPS6478421A (en) 1989-03-23

Family

ID=16993326

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23592987A Pending JPS6478421A (en) 1987-09-18 1987-09-18 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS6478421A (en)

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