Preparation method for polyhexafluoroepoxypropanediacyl fluoride

The invention discloses an improved preparation method for polyhexafluoroepoxypropanediacyl fluoride. The preparation method comprises the steps of: in a polar non-proton carbon-hydrogen organic solvent, taking a composition of perfluoro-2,7-bis(trifluoromethyl)-3,6-dioxo-octyl-diacyl fluoride and a...

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Bibliographische Detailangaben
Hauptverfasser:	LI YITAO, XU JUNXING, ZHANG BINGBING, ZHENG BAOYE, FENG HAIBING, YOU MENGMENG, LU CUIFANG, YANG FENG
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The invention discloses an improved preparation method for polyhexafluoroepoxypropanediacyl fluoride. The preparation method comprises the steps of: in a polar non-proton carbon-hydrogen organic solvent, taking a composition of perfluoro-2,7-bis(trifluoromethyl)-3,6-dioxo-octyl-diacyl fluoride and alkali metal fluoride as an initiator, adding a fluorine-containing diluent at a low temperature, and introducing hexafluoroepoxypropane for performing ring-opening polymerization to prepare polyhexafluoroepoxypropanediacyl fluoride. The method is simple in operation steps and relatively low in cost, and the average molecular weight of prepared polyhexafluoroepoxypropanediacyl fluoride can reach 10,000.