JPS563429A - Magnetic recording substance - Google Patents

Magnetic recording substance

Info

Publication number
JPS563429A
JPS563429A JP7750779A JP7750779A JPS563429A JP S563429 A JPS563429 A JP S563429A JP 7750779 A JP7750779 A JP 7750779A JP 7750779 A JP7750779 A JP 7750779A JP S563429 A JPS563429 A JP S563429A
Authority
JP
Japan
Prior art keywords
magnetic powder
magnetic
dispersed
compound
supporter
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
JP7750779A
Other languages
Japanese (ja)
Other versions
JPH0130222B2 (en
Inventor
Akio Ishizawa
Minoru Hashimoto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7750779A priority Critical patent/JPS563429A/en
Publication of JPS563429A publication Critical patent/JPS563429A/en
Publication of JPH0130222B2 publication Critical patent/JPH0130222B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain a magnetic recording medium which excels in the resistance to wear, by providing the mixture layer of the magnetic powder attached by the radical (co)polymer, the copolymer of vinyl chloride-vinyl acetate having more than one group of OH and COOH and the isocyanate compound each.
CONSTITUTION: The magnetic powder is dispersed into the aqueous medium, and then the radical (co)polymerizable compound of 5W50pts.wt. to the magnetic powder of 50W95pts.wt. plus the compound which causes the HSO3 ion are added to the above-mentioned dispersed substance. Thus the magnetic powder is obtained with the (co)polymer stuck firmly to the magnetic powder by the graft polymezisation. This magnetic powder is then dispersed into the solvent, and then the magnetic coating material to which the vinyl chloride-vinyl acetate copolymer containing the OH and COOH groups and the isocyanate compound are added in a proper amount each is applied to the supporter of polyester or the like to be dried then. The magnetic tape thus obtained has the rigid adhesion between the supporter and the magnetic layer and the magnetic powder each, thus securing the excellent resistance to wear and high sensitivity.
COPYRIGHT: (C)1981,JPO&Japio
JP7750779A 1979-06-21 1979-06-21 Magnetic recording substance Granted JPS563429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7750779A JPS563429A (en) 1979-06-21 1979-06-21 Magnetic recording substance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7750779A JPS563429A (en) 1979-06-21 1979-06-21 Magnetic recording substance

Publications (2)

Publication Number Publication Date
JPS563429A true JPS563429A (en) 1981-01-14
JPH0130222B2 JPH0130222B2 (en) 1989-06-16

Family

ID=13635871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7750779A Granted JPS563429A (en) 1979-06-21 1979-06-21 Magnetic recording substance

Country Status (1)

Country Link
JP (1) JPS563429A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885925A (en) * 1981-11-16 1983-05-23 Tdk Corp Magnetic recording medium
JPS6266418A (en) * 1985-09-19 1987-03-25 Tdk Corp Magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5113906A (en) * 1974-07-26 1976-02-03 Hitachi Ltd CHOKURYUKINOABURADOMESOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5113906A (en) * 1974-07-26 1976-02-03 Hitachi Ltd CHOKURYUKINOABURADOMESOCHI

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5885925A (en) * 1981-11-16 1983-05-23 Tdk Corp Magnetic recording medium
JPS6240765B2 (en) * 1981-11-16 1987-08-31 Tdk Electronics Co Ltd
JPS6266418A (en) * 1985-09-19 1987-03-25 Tdk Corp Magnetic recording medium

Also Published As

Publication number Publication date
JPH0130222B2 (en) 1989-06-16

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