パーフルオロポリエーテルおよびその製造および使用方法

Japanese Patent JP5242879

B2

A perfluoropolyether, a composition comprising the perfluoropolyether, a process for producing the perfluoropolyether, and a process for improving the thermostability of grease or lubricant are provided. The perfluoropolyether comprises perfluoroalkyl radical end groups in which the radical has at least 3 carbon atoms per radical and is substantially free of perfluoromethyl and perfluoroethyl end groups. The process for producing the perfluoropolyether can comprise (1) contacting a perfluoro acid halide, a C2- to C4-substituted ethyl epoxide, or a C3+ fluoroketone with a metal halide to produce an alkoxide; (2) contacting the alkoxide with either hexafluoropropylene oxide or tetrafluorooxetane to produce a second acid halide; (3) esterifying the second acid halide to an ester; (4) reducing the ester to its corresponding alcohol; (5) converting the alcohol with a base to a salt form; (6) contacting the salt form with a C3 or higher olefin to produce a fluoropolyether; and (7) fluorinating the fluoropolyether. The process for improving the thermostability of a grease or lubricant comprises combining the grease or lubricant with the composition.

JP3696255

NOVEL LUBRICATING OIL AND GREASE

John El. Howell
Eric William Perez
Alfred Waterfeld
Chadron Mark Friesen
Joseph Stewart Slasher

JP2002512274A

July 24, 2013

July 19, 2001

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E.I.DU PONT DE NEMOURS AND COMPANY

C08G65/00; C10M105/54; C08G65/22; C08K3/36; C08K3/38; C08L27/18; C08L71/00; C10M107/38; C10M113/00; C10M113/12; C10M119/22; C10M147/04; C10M169/02; C10M169/06; C10N30/08; C10N50/10

JP8003405A
JP2043219A
JP6080773A
JP1225628A

Shigeyoshi
Toshiaki Iwasaki
Yoshikazu Tani
Kazuo Abe

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