| 摘要 |
A compound comprising Formula 2A, 2B, or 2C (Ra-O-CO-)2Y Formula 2A Ra-O-CO-Y-CO-O-(CH2CH2)Rf Formula 2B Ra-O-CO-Y-CO-O-R Formula 2C wherein Ra is the group (i) Rf(CH2CF2)d-(CgH2g)-; (ii) RfOCF2CF2-(CgH2g)-; (iii) RfOCFHCF2O(CH2CH2O)v-(CgH2g)-; (iv) RfOCFHCF2O(CwH2w)-; (v) RfOCF(CF3)CONH-(CgH2g)-; or (vi) Rf(CH2)h[(CF2CF2)i(CH2CH2)j]k; each Rf is independently CcF(2c+1); c is 2 to about 6; d is 1 to about 3; g is 1 to 4; v is 1 to about 4; w is from about 3 to about 12; h is 1 to about 6; i, j, and k are each independently 1, 2, or 3, or a mixture thereof; provided that the total number of carbon atoms in group (vi) is from about 8 to about 22; Y is a linear or branched diradical having olefinic unsaturation of the formula -CeH(2e-2)- wherein e is 2 or 3; R is H or a linear or branched alkyl group CbH(2b+1)-; and b is from 1 to about 18.
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