Lubricant

• US 7,968,505 B2
• Filed: 03/26/2008
• Issued: 06/28/2011
• Est. Priority Date: 08/06/2004
• Status: Expired due to Fees

• Current Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Original Assignee: Seagate Technology LLC (Seagate Technology Holdings Plc)
• Inventors: Liu, Jianwei, Stirniman, Michael Joseph
• Primary Examiner(s): Caldarola; Glenn A
• Assistant Examiner(s): Oladapo; Taiwo
• Application Number:
  US12/055,946
• Publication Number:
  US 20080305975A1
• Time in Patent Office: 1,189 Days
• Field of Search: 508/243, 508/422, 508/545, 508/548, 508/564, 508/579, 508/591, 508/425, 508/427, 508/430, 508/551, 508/560
• US Class Current: 508/591
• CPC Class Codes: C10M 107/48 containing phosphorus
• CPC Class Codes: C10M 2213/0606 used as base material
• CPC Class Codes: C10M 2225/0405 used as base material
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2040/18 in connection with recordings on magnetic tape or disc
• CPC Class Codes: C10N 2050/023 Multi-layer lubricant coatings
• CPC Class Codes: C10N 2060/12 by phosphorus or a compound containing phosphorus, e.g. PxSy
• CPC Class Codes: C10N 2070/00 Specific manufacturing methods for lubricant compositions
• CPC Class Codes: G11B 5/7257 Perfluoropolyether lubricant

Abstract

A magnetic recording medium comprising a lubricant film comprising a photosynthesized lubricant having a single phase composition of at least a lubricant moiety and an additive moiety is disclosed.

Claims

1. A photosensitized lubricant having a single phase composition of at least a lubricant moiety that is chemically linked to an additive moiety, wherein a molecule of the photosynthesized lubricant comprises a main-chain of one or more perfluoropolyether (PFPE) moieties, with a first end of the molecule having a pentaphenoxy cyclotriphosphazene, and wherein a second end of the molecule has an amide group.

2. The photosensitized lubricant of claim 1, wherein the second end of the molecule has an acetamide group.