发明名称 |
Perfluoropolyethers and processes therefor and therewith |
摘要 |
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. |
申请公布号 |
AU7356901(A) |
申请公布日期 |
2002.01.30 |
申请号 |
AU20010073569 |
申请日期 |
2001.07.19 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
JON L HOWELL;ERIK WILLIAM PEREZ;ALFRED WATERFELD;CHADRON MARK FRIESEN;JOSEPH STUART THRASHER |
分类号 |
C10M105/54;C08G65/00;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 |
主分类号 |
C10M105/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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