Perfluorinated polyethers (PFPE) as magnetic lubricants

US9045711B2 · kind B2 · utility

Assignee

• HGST Netherlands, B.V. · NL

Inventors

• Hong Deng · San Jose, US
• Xing-Cai Guo · Lo Wu, CN
• Vedantham Raman · معلمی نژاد, US
• Robert Waltman · Gilroy, US
• Yu-Chen Wu · New Taipei, TW

Key dates

• Filing date: Dec 16, 2011
• Grant date: Jun 2, 2015
• Expiry date: Feb 25, 2033

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2050/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A surface agent includes two end portions and a middle portion disposed between the end portions. The end portions include an anchor group or a truncation group. The anchor group includes at least one surface active functional group. The midsection includes at least one perfluoroalkyl-branched perfluorinated ether unit.