JPS5690422A - Magnetic recording medium and its production - Google Patents

Magnetic recording medium and its production

Info

Publication number
JPS5690422A
JPS5690422A JP16567179A JP16567179A JPS5690422A JP S5690422 A JPS5690422 A JP S5690422A JP 16567179 A JP16567179 A JP 16567179A JP 16567179 A JP16567179 A JP 16567179A JP S5690422 A JPS5690422 A JP S5690422A
Authority
JP
Japan
Prior art keywords
magnetic
polyurethane
polyvalent isocyanate
recording medium
magnetic recording
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
JP16567179A
Other languages
Japanese (ja)
Inventor
Hiroaki Hiratsuka
Hiroaki Hanabusa
Kozaburo Nakamura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16567179A priority Critical patent/JPS5690422A/en
Publication of JPS5690422A publication Critical patent/JPS5690422A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To improve resistances to heat and wear, by using a starting resin for binder to disperse magnetic powder into the straight-chain thermoplastic polyurethane and by obtaining a magnetic film having a specific stress for stretching at the stage of cross-linking with polyvalent isocyanate.
CONSTITUTION: The magnetic coating material consisting of the polyurethane solution of at least 5W15wt% concentration, magnetic powder, and the polyvalent isocyanate of 5W20wt% based on polyurethane solid components is appllied to the film and is subjected to heat treatment at 60W100°C for severalW24hr to obtain a magnetic recording medium. In this case, the said polyurethane is the straight- chain thermoplastic polyurethane, and a magnetic layer having ≥1kg/mm2 stress for (per the initial section) at 50% stretching when it is cross-linked with polyvalent isocyanate.
COPYRIGHT: (C)1981,JPO&Japio
JP16567179A 1979-12-21 1979-12-21 Magnetic recording medium and its production Pending JPS5690422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16567179A JPS5690422A (en) 1979-12-21 1979-12-21 Magnetic recording medium and its production

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16567179A JPS5690422A (en) 1979-12-21 1979-12-21 Magnetic recording medium and its production

Publications (1)

Publication Number Publication Date
JPS5690422A true JPS5690422A (en) 1981-07-22

Family

ID=15816804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16567179A Pending JPS5690422A (en) 1979-12-21 1979-12-21 Magnetic recording medium and its production

Country Status (1)

Country Link
JP (1) JPS5690422A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928223A (en) * 1982-07-21 1984-02-14 バスフ　アクチエンゲゼルシヤフト Magnetic recording carrier
JPS5930236A (en) * 1982-07-21 1984-02-17 バスフ　アクチエンゲゼルシヤフト Magnetic recording carrier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5928223A (en) * 1982-07-21 1984-02-14 バスフ　アクチエンゲゼルシヤフト Magnetic recording carrier
JPS5930236A (en) * 1982-07-21 1984-02-17 バスフ　アクチエンゲゼルシヤフト Magnetic recording carrier
JPH056732B2 (en) * 1982-07-21 1993-01-27 Basf Ag
JPH056733B2 (en) * 1982-07-21 1993-01-27 Basf Ag

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