Title:
磁気記録媒体用潤滑剤の精製方法
Document Type and Number:
Japanese Patent JP4120199
Kind Code:
B2
Abstract:
A method to refine a lubricant on a magnetic recording medium includes a compound A including a perfluoropolyether molecular structure having two hydroxyl groups at each of two ends and a compound B including the perfluoropolyether molecular structure having one hydroxyl group at each of two ends. The method includes putting the lubricant into a pressure vessel set at a pressure and a temperature and removing the compound B dissolved in an extracting medium of a supercritical carbon dioxide fluid that flows at a predetermined rate through the pressure vessel held at a predetermined temperature and at a predetermined pressure. The method performs recovering the compound A dissolved in the extracting medium that flows through the pressure vessel held at the predetermined pressure and at a temperature lower than the predetermined temperature or at the predetermined temperature and at a pressure higher than the predetermined pressure.
More Like This:
| WO/2009/096570 | LUBRICANT COMPOSITIONS |
| WO/1990/007562 | FLUORINATED LUBRICATING COMPOSITIONS |
| JPH06176355 | MAGNETIC RECORDING MEDIUM |
Inventors:
Yoshihito Osawa
Shinji Shirai
Masayuki Ishikawa
Shinji Shirai
Masayuki Ishikawa
Application Number:
JP2001326795A
Publication Date:
July 16, 2008
Filing Date:
October 24, 2001
Export Citation:
Assignee:
Fuji Electric Device Technology Co., Ltd.
International Classes:
C10M105/54; C10M107/38; C10M175/00; G11B5/71; G11B5/725; C10N30/08; C10N40/18; C10N70/00
Domestic Patent References:
| JP2001052327A | ||||
| JP2001164279A | ||||
| JP2001229524A |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe
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