Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2006-11-14
2006-11-14
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C560S223000
Reexamination Certificate
active
07135592
ABSTRACT:
A polyfluoroalkyl ester of unsaturated carboxylic acid is produced in high yield in a more simple reactor and with much more reduction in the waste than the conventional process based on esterification reaction by subjecting a polyfluoroalkanol represented by the following general formula:in-line-formulae description="In-line Formulae" end="lead"?Rf—R—OHin-line-formulae description="In-line Formulae" end="tail"?where Rf is a polyfluoroalkyl group having 1–6 carbon atoms and R is an alkylene group having 1–6 carbon atoms, and an unsaturated carboxylic acid to dehydration reaction in a fluorine-containing solvent in the presence of an acid catalyst and a polymerization inhibitor.
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Inhibition of Gap Junctional Intercellular Communication by Perfluorinated Fatty Acids is Dependent on the Chain Length of the Fluorinated Tail, Brad L. Upham, et al, Int. J. Cancer: 78, 491-495 (1998).
Ikeda Sunao
Kokin Keisuke
Sato Katsuyuki
Urata Kimihiko
Butzel Long
Unimatec Co. Ltd.
Zucker Paul A.
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