Title:
PRODUCTION OF LUBRICANT
Document Type and Number:
Japanese Patent JPH09157674
Kind Code:
A
Abstract:
To produce a lubricant effective for imparting a magnetic recording medium with excellent transport durability in high purity without using a fluorine-based solvent by esterifying a perfluoropolyether having terminal OH, extracting the produced ester with a solvent and hydrolyzing the product.
The objective lubricant is produced by esterifying a perfluoropolyether having terminal OH and contained in a synthetic material [e.g. a compound of the formula, HOCH2CF2(OC2F4)p(OCF2)qOCF2CH2OH (p≥1; q≥1) with an esterifying agent such as a 6-12C carboxylic acid chloride, extracting the obtained ester compound with a solvent such as an ether and hydrolyzing the extract with a potassium hydroxide solution, a sodium hydroxide solution, etc.
More Like This:
JPS61113130 | LUBRICANT FOR MAGNETIC RECORDING MEDIUM |
JPH0762907 | [Title of Invention] Magnetic recording medium |
JPH0414613 | MAGNETIC RECORDING MEDIUM |
Inventors:
KONDO HIROFUMI
Application Number:
JP32039095A
Publication Date:
June 17, 1997
Filing Date:
December 08, 1995
Export Citation:
Assignee:
SONY CORP
International Classes:
C10M105/54; C10M107/38; C10M177/00; G11B5/71; C10N40/18; C10N60/00; C10N70/00; (IPC1-7): C10M105/54; C10M107/38; C10M177/00; G11B5/71
Attorney, Agent or Firm:
Akira Koike (2 outside)
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