JPS551636A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS551636A
JPS551636A JP7436578A JP7436578A JPS551636A JP S551636 A JPS551636 A JP S551636A JP 7436578 A JP7436578 A JP 7436578A JP 7436578 A JP7436578 A JP 7436578A JP S551636 A JPS551636 A JP S551636A
Authority
JP
Japan
Prior art keywords
magnetic layer
magnetic
liquid paraffin
phthalic
acid ester
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
JP7436578A
Other languages
Japanese (ja)
Other versions
JPS6049972B2 (en
Inventor
Shoichi Sakamoto
Akira Matsumoto
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 JP7436578A priority Critical patent/JPS6049972B2/en
Publication of JPS551636A publication Critical patent/JPS551636A/en
Publication of JPS6049972B2 publication Critical patent/JPS6049972B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To improve the defacement-proof property of a magnetic layer to make a magnetic recording medium superior in durability by causing the magnetic layer, where a specific resin is a binder, to include liquid paraffin and phthalic-acid ester.
CONSTITUTION: Drift paraffin and phthalic-acid ester are added and mixed to the magnetic paint where a mixture of a vinyl chloride-vinyl acetate system copolymer and an urethane polymer is a binder for magnetic powder. The obtained paint is applied onto a substrate and is dried, and a magnetic layer is formed. As regards drift paraffin, 0.5 to 1 weight % for magnetic powder is used, and it is desirable that the weight ratio of phthalic-acid ester to liquid paraffin is 1/1 to 1/10. As a result, liquid paraffin over a required quantity can be prevented from exuding onto the magnetic layer surface even in case of a large quantity of liquid paraffin, and lubrication effects superior in long-time stability can be obtained, and the defacement-proof property of the magnetic layer is improved furthermore.
COPYRIGHT: (C)1980,JPO&Japio
JP7436578A 1978-06-20 1978-06-20 magnetic recording medium Expired JPS6049972B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7436578A JPS6049972B2 (en) 1978-06-20 1978-06-20 magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7436578A JPS6049972B2 (en) 1978-06-20 1978-06-20 magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS551636A true JPS551636A (en) 1980-01-08
JPS6049972B2 JPS6049972B2 (en) 1985-11-06

Family

ID=13545047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7436578A Expired JPS6049972B2 (en) 1978-06-20 1978-06-20 magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS6049972B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4699817A (en) * 1985-05-01 1987-10-13 Victor Company Of Japan, Ltd. Magnetic recording medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4699817A (en) * 1985-05-01 1987-10-13 Victor Company Of Japan, Ltd. Magnetic recording medium

Also Published As

Publication number Publication date
JPS6049972B2 (en) 1985-11-06

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