JPS5761067A - Production of magnetic paint - Google Patents

Production of magnetic paint

Info

Publication number
JPS5761067A
JPS5761067A JP13720080A JP13720080A JPS5761067A JP S5761067 A JPS5761067 A JP S5761067A JP 13720080 A JP13720080 A JP 13720080A JP 13720080 A JP13720080 A JP 13720080A JP S5761067 A JPS5761067 A JP S5761067A
Authority
JP
Japan
Prior art keywords
abrasive
magnetic
magnetic paint
production
binder
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
JP13720080A
Other languages
Japanese (ja)
Inventor
Shizuo Furuyama
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP13720080A priority Critical patent/JPS5761067A/en
Publication of JPS5761067A publication Critical patent/JPS5761067A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain a magnetic paint which can form a magnetic tape having excellent squareness ratio and coercive force without damaging the needle likeness of a magnetic powder, by blending an abrasive as a component of the magnetic paint, by post-addition in the production of the magnetic paint.
CONSTITUTION: In the production of a magnetic paint by using a polyurethanenitrocellulose binder, a magnetic powder, a binder such as nitrocellulose, and additives (except an abrasive) such as a lubricant, a plasticizer and a crosslinking agent are firstly stirred in a solvent to carry out primary dispersion. Then another binder such as polyurethane is added, and the mixture is stirred to carry out secondary dispersion. Finally, an abrasive is added, mixed and dispersed to form a magnetic paint. As said abrasive, alumina or silicon carbide having an average particle size of 0.05W3μ is used. The abrasive is used in an amount of 0.1W10pts.wt. per 100pts.wt. magnetic powder.
COPYRIGHT: (C)1982,JPO&Japio
JP13720080A 1980-09-30 1980-09-30 Production of magnetic paint Pending JPS5761067A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13720080A JPS5761067A (en) 1980-09-30 1980-09-30 Production of magnetic paint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13720080A JPS5761067A (en) 1980-09-30 1980-09-30 Production of magnetic paint

Publications (1)

Publication Number Publication Date
JPS5761067A true JPS5761067A (en) 1982-04-13

Family

ID=15193124

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13720080A Pending JPS5761067A (en) 1980-09-30 1980-09-30 Production of magnetic paint

Country Status (1)

Country Link
JP (1) JPS5761067A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238648A (en) * 1989-11-10 1991-06-05 Tdk Corp Magnetic tape cartridge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52151898A (en) * 1976-06-11 1977-12-16 Hitachi Ltd Manufacturing method of magnetic paint
JPS5572305A (en) * 1978-11-28 1980-05-31 Teijin Ltd Electrical insulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52151898A (en) * 1976-06-11 1977-12-16 Hitachi Ltd Manufacturing method of magnetic paint
JPS5572305A (en) * 1978-11-28 1980-05-31 Teijin Ltd Electrical insulator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2238648A (en) * 1989-11-10 1991-06-05 Tdk Corp Magnetic tape cartridge
US5172288A (en) * 1989-11-10 1992-12-15 Tdk Corporation Magnetic recording medium and a tape guide in a cartridge
GB2238648B (en) * 1989-11-10 1994-08-10 Tdk Corp Magnetic tape cartridge

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