JPS644920A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS644920A
JPS644920A JP16183887A JP16183887A JPS644920A JP S644920 A JPS644920 A JP S644920A JP 16183887 A JP16183887 A JP 16183887A JP 16183887 A JP16183887 A JP 16183887A JP S644920 A JPS644920 A JP S644920A
Authority
JP
Japan
Prior art keywords
polyurethane
salt
recording medium
binder
contg
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
JP16183887A
Other languages
Japanese (ja)
Other versions
JPH0695379B2 (en
Inventor
Eiji Kitaura
Hitoshi Azegami
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP16183887A priority Critical patent/JPH0695379B2/en
Publication of JPS644920A publication Critical patent/JPS644920A/en
Publication of JPH0695379B2 publication Critical patent/JPH0695379B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To improve the dispersibility of CrO2 powder and durability by incorporating polybutyrene adipate polyurethane contg. a sulfo group or the salt thereof and polycaprolactone polyurethane contg. a carboxyl group or the salt thereof into a binder. CONSTITUTION:This recording medium has a magnetic layer contg. the magnetic CrO2 powder and the binder on a base. This binder contains the polybutyrene adipate polyurethane having the sulfo group or the salt thereof and the polycaprolactone polyurethane having the carboxyl group or the salt thereof and contains, if necessary, other binder resins and hardener. The weight ratio of the polybutyrene adipate polyurethane/polycaprolactone polyurethane is 3/1-1/3. The dispersibility of the CrO2 powder is thereby improved and the recording medium having the excellent durability is obtd.
JP16183887A 1987-06-29 1987-06-29 Magnetic recording medium Expired - Lifetime JPH0695379B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16183887A JPH0695379B2 (en) 1987-06-29 1987-06-29 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16183887A JPH0695379B2 (en) 1987-06-29 1987-06-29 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS644920A true JPS644920A (en) 1989-01-10
JPH0695379B2 JPH0695379B2 (en) 1994-11-24

Family

ID=15742894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16183887A Expired - Lifetime JPH0695379B2 (en) 1987-06-29 1987-06-29 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPH0695379B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947980A (en) * 1989-03-02 1990-08-14 American Telephone And Telegraph Company Method and apparatus for stopping and clamping substrates

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947980A (en) * 1989-03-02 1990-08-14 American Telephone And Telegraph Company Method and apparatus for stopping and clamping substrates

Also Published As

Publication number Publication date
JPH0695379B2 (en) 1994-11-24

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