JPS55129933A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS55129933A
JPS55129933A JP3581179A JP3581179A JPS55129933A JP S55129933 A JPS55129933 A JP S55129933A JP 3581179 A JP3581179 A JP 3581179A JP 3581179 A JP3581179 A JP 3581179A JP S55129933 A JPS55129933 A JP S55129933A
Authority
JP
Japan
Prior art keywords
magnetic
recording medium
superior
binder
magnetic powder
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
JP3581179A
Other languages
Japanese (ja)
Inventor
Takeshi Matsuura
Seiji Wataya
Akira Morioka
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 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 JP3581179A priority Critical patent/JPS55129933A/en
Publication of JPS55129933A publication Critical patent/JPS55129933A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain a magnetic recording medium which is superior in dispersion of magnetic powder and durability, by using a binder obtained by mixing a vinyl chloride-vinyl acetate-vinyl alcohol copolymer and a polyurethane prepolymer in a specific proportion.
CONSTITUTION: The material obtained by mixing comparatively hard resin (VAGH made in U.C.C., etc.,) superior in dispersion and charging of magnetic powder as a vinyl chloride-vinyl acetate-vinyl alcohol copolymer and a linear chain polyurethane prepolymer having isocyanate radicals at both ends in the proportions of 95: 5W75:25 is used as a binder. This binder and a magnetic paint including magnetic powder consisting of γ-Fe2O3, Fe3O4 containing Co, etc., are applied to a polyester film, etc., to obtain a magnetic tape. Thus, even high-coercive force powder such as magnetic powder containing Co which has a bad dispersion property generally is dispersed well, so that a magnetic recording medium superior in durability and S/N ratio can be obtained for high-density recording for video, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP3581179A 1979-03-26 1979-03-26 Magnetic recording medium Pending JPS55129933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3581179A JPS55129933A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3581179A JPS55129933A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS55129933A true JPS55129933A (en) 1980-10-08

Family

ID=12452305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3581179A Pending JPS55129933A (en) 1979-03-26 1979-03-26 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS55129933A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109007A (en) * 1973-02-13 1974-10-17

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49109007A (en) * 1973-02-13 1974-10-17

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