发明授权
US07910671B2 Linear perfluoropolyethers having an improved thermooxidative stability
有权
具有改善的热氧化稳定性的线性全氟聚醚
- 专利标题： Linear perfluoropolyethers having an improved thermooxidative stability
- 专利标题（中）： 具有改善的热氧化稳定性的线性全氟聚醚
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申请号： US11648549申请日： 2007-01-03
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公开(公告)号： US07910671B2公开(公告)日： 2011-03-22
- 发明人: Pier Antonio Guarda , Giuseppe Marchionni
- 申请人： Pier Antonio Guarda , Giuseppe Marchionni
- 申请人地址： IT Milano
- 专利权人： Solvay Solexis S.p.A.
- 当前专利权人： Solvay Solexis S.p.A.
- 当前专利权人地址： IT Milano
- 代理机构： Arent Fox LLP
- 优先权： ITMI2003A0372 20030303
- 主分类号： C08F16/24
- IPC分类号： C08F16/24
摘要：
Linear perfluoropolyethers of formula: T-O(CF2O)n(CF2CF2O)m(CF2CF2CF2O)r(CF2CF2CF2CF2O)s-T1 (I) wherein n, m, r, s are integers such that the polymer number average molecular weight is comprised between 700 and 100,000 and the n/(n+m+r+s) ratio ranges from 0.05 to 0.40, and respective preparation process by addition of a peroxidic perfluoropolyether of formula (III): T4-O(CF2O)n′(CF2CF2O)m′(O)h-T5 (III) having a PO from 1.8 to 4, to a perfluoropolyether oil preheated at a temperature comprised between 150° C. and 250° C. and subsequent exhaustive fluorination of the obtained compound.
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