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    • 71. 发明申请
    • Linear perfluoropolyethers having an improved thermooxidative stability
    • 具有改善的热氧化稳定性的线性全氟聚醚
    • US20070112156A1
    • 2007-05-17
    • US11648549
    • 2007-01-03
    • Pier GuardaGiuseppe Marchionni
    • Pier GuardaGiuseppe Marchionni
    • B32B27/00
    • C08G65/007Y10T428/3154
    • 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.
    • 线性全氟聚醚,其结构如下:<?in-line-formula description =“In-line formula”end =“lead”?>(CF 2 O 2)n(CF (CF 2)2 CF 2 O 2(CF 2)2 CF 2, (CF 2)2 CF 2 CF 2 CH 2 CF 2 R 2 CF (I)<?in-line-formula description =“In-line Formulas”end =“tail”?>其中n, m,r,s是整数,使得聚合物数均分子量在700和100,000之间,n /(n + m + r + s)的比例为0.05至0.40,各自的制备方法通过加入过氧化物 式(III)的全氟聚醚:<?in-line-formula description =“In-line Formulas”end =“lead”?> T (O)n'(CF 2)2 O 2)(O)H(O) 对于全氟聚醚油进行预热的“=”在线公式“末端=”尾“→具有1.8至4的PO, 在包含的温度下 在150℃和250℃之间,随后彻底氟化所得化合物。