JPS54135507A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS54135507A
JPS54135507A JP4355678A JP4355678A JPS54135507A JP S54135507 A JPS54135507 A JP S54135507A JP 4355678 A JP4355678 A JP 4355678A JP 4355678 A JP4355678 A JP 4355678A JP S54135507 A JPS54135507 A JP S54135507A
Authority
JP
Japan
Prior art keywords
coating
degradation
magnetic
prepare
recording medium
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
JP4355678A
Other languages
Japanese (ja)
Other versions
JPS5746128B2 (en
Inventor
Masaharu Nishimatsu
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 JP4355678A priority Critical patent/JPS54135507A/en
Publication of JPS54135507A publication Critical patent/JPS54135507A/en
Publication of JPS5746128B2 publication Critical patent/JPS5746128B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To produce magnetic coating free from degradation in performance despite long term exposure by using a binder composed of hardening components compounded with the specific polyether base surface active agent.
CONSTITUTION: The polyether base surface active agent expressed by R-(C2H4O)n OOCR(R is alkyl, alkyl phenyl; n is integer of over 1) is compounded to the hardening components comprising adding a hardener to a thermoplastic polyurethane resin, vinyl chloride-vinyl acetate copolymer, etc. to prepare the binder. To this is mixed magnetic powder such as γ-Fe2O3 to prepare the magnetic coating. Even if the abovementioned magnetic coating is used after lapse of a long time after the preparation, no degradation in performance is observed as compared to the use immediate after the preparation, thus coating this on a substrate such as polyester film enables the magnetic recording medium of superior properties such as orientation characteristic, surface characteristic and others to be produced.
COPYRIGHT: (C)1979,JPO&Japio
JP4355678A 1978-04-13 1978-04-13 Magnetic recording medium Granted JPS54135507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4355678A JPS54135507A (en) 1978-04-13 1978-04-13 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4355678A JPS54135507A (en) 1978-04-13 1978-04-13 Magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS54135507A true JPS54135507A (en) 1979-10-20
JPS5746128B2 JPS5746128B2 (en) 1982-10-01

Family

ID=12667016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4355678A Granted JPS54135507A (en) 1978-04-13 1978-04-13 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS54135507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598129A (en) * 1982-07-06 1984-01-17 Matsushita Electric Ind Co Ltd Flexible magnetic disk

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598129A (en) * 1982-07-06 1984-01-17 Matsushita Electric Ind Co Ltd Flexible magnetic disk
JPH0456368B2 (en) * 1982-07-06 1992-09-08 Matsushita Electric Ind Co Ltd

Also Published As

Publication number Publication date
JPS5746128B2 (en) 1982-10-01

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