Perfluoropolyether containing lubricants with mixed end groups

US8852763B2 · kind B2 · utility

Assignee

• Seagate Technology LLC · US

Inventors

• Xiaoping Yan · Pleasanton, US
• Michael J. Stirniman · Fremont, US

Key dates

• Filing date: Apr 25, 2012
• Grant date: Oct 7, 2014
• Expiry date: Aug 2, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of formula I:wherein X are independently —(CH2)b—, wherein b is 0 or an integer from 1 to 6; Rf are independently —CF2O(CF2CF2O)p(CF2)qCF2—, —CF2CF2O(CF2CF2CF2O)rCF2CF2—, or —CF2CF2CF2O(CF2CF2CF2CF2O)sCF2CF2CF2—, or derivatives thereof, wherein p, q, r and s are independently integers so that Mn of Rf is about 150 to 4500; and Z are independently chosen from groups that comprise —OH, —(OH)2, —COOCH3, —F, —CF3, or —CF2CF3, with the caveat that not all Z are the same.