摘要:
Process for preparing dichlorofluoroacetylfluoride (CFCl.sub.2 COF) comprising the following steps:a) fluorination with hydrofluoric acid (HF) of the trichloroacetyl halide in a fixed or fluidized tubular bed reactor, filled with fluorination catalysts and having a temperature profile between the inlet of the reactants and the outlet of the reaction products, in the range from 175.degree. C. to 275.degree. C.b) distillation of the reaction products with trichloroacetylfluoride recycle and recovery of a mixture formed by HF and CFCl.sub.2 COF;c) separation of the HF/CFCl.sub.2 COF mixture components by cooling at temperatures lower than -10.degree. C., and optionally the HF recycle.
摘要:
The invention relates to new thermoprocessable copolymers of tetrafluoroethylene constituted by perfluoromethylvinylether (0.5-13% by weight), a fluorinated dioxole (0.05-3%) and tetrafluoroethylene (difference to 100%), particularly useful for coating electric cables by melt extrusion. It relates also to new perfluorodioxoles of formula ##STR1## wherein R.sub.F is a C.sub.1 -C.sub.5 perfluoroalkyl radical; X.sub.1 and X.sub.2 are, independently from each other, F or CF.sub.3 ; and their homopolymers and copolymers, in particular thermoprocessable copolymers as defined above.
摘要翻译:本发明涉及由全氟甲基乙烯基醚(0.5-13重量%),氟化二氧杂环戊烯(0.05-3%)和四氟乙烯(差异至100%)构成的四氟乙烯的新型热可加工共聚物,特别适用于通过熔融挤出涂覆电缆。 它还涉及式为“IMAGE”的新的全氟二恶烷,其中RF是C1-C5全氟烷基; X 1和X 2彼此独立地为F或CF 3; 和它们的均聚物和共聚物,特别是如上定义的热可加工共聚物。
摘要:
The invention relates to new thermoprocessable copolymers of tetrafluoroethylene constituted by perfluoromethylvinylether (0.5-13% by weight), a fluorinated dioxole (0.05-3%) and tetrafluoroethylene (difference to 100%), particularly useful for coating electric cables by melt extrusion. It relates also to new perfluorodioxoles of formula ##STR1## wherein R.sub.F is a C.sub.1 -C.sub.5 perfluoroalkyl radical; X.sub.1 and X.sub.2 are, independently from each other, F or CF.sub.3 ; and their homopolymers and copolymers, in particular thermoprocessable copolymers as defined above.
摘要:
The invention relates to new thermoprocessable copolymers of tetrafluoroethylene constituted by perfluoromethylvinylether (0.5-13% by weight), a fluorinated dioxole (0.05-3%) and tetrafluoroethylene (difference to 100%), particularly useful for coating electric cables by melt extrusion. It relates also to new perfluorodioxoles of formula ##STR1## wherein R.sub.F is a C.sub.1 -C.sub.5 perfluoroalkyl radical; X.sub.1 and X.sub.2 are, independently from each other, F or CF.sub.3 ; and their homopolymers and copolymers, in particular thermoprocessable copolymers as defined above.
摘要翻译:本发明涉及由全氟甲基乙烯基醚(0.5-13重量%),氟化二氧杂环戊烯(0.05-3%)和四氟乙烯(差异至100%)构成的四氟乙烯的新型热可加工共聚物,特别适用于通过熔融挤出涂覆电缆。 它还涉及式为“IMAGE”的新的全氟二恶烷,其中RF是C1-C5全氟烷基; X 1和X 2彼此独立地为F或CF 3; 和它们的均聚物和共聚物,特别是如上定义的热可加工共聚物。
摘要:
The invention relates to new thermoprocessable copolymers of tetrafluoroethylene constituted by perfluoromethylvinylether (0.5-13% by weight), a fluorinated dioxole (0.05-3%) and tetrafluoroethylene (difference to 100%), particularly useful for coating electric cables by melt extrusion.It relates also to new perfluorodioxoles of formula ##STR1## wherein R.sub.F is a C.sub.1 -C.sub.5, perfluoroalkyl radical; X.sub.1 and X.sub.2 are, independently from each other, F or CF.sub.3 ; and their homopolymers and copolymers, in particular thermoprocessable copolymers as defined above.
摘要翻译:本发明涉及由全氟甲基乙烯基醚(0.5-13重量%),氟化二氧杂环戊烯(0.05-3%)和四氟乙烯(差异至100%)构成的四氟乙烯的新型热可加工共聚物,特别适用于通过熔融挤出涂覆电缆。 它还涉及新的全氟二恶烷,其中RF是C1-C5,全氟烷基; X 1和X 2彼此独立地为F或CF 3; 和它们的均聚物和共聚物,特别是如上定义的热可加工共聚物。
摘要:
A process for fluorinating hydrocarbon compounds, which comprises: A. providing a compound selected from the group consisting of straight-chain, branched-chain and cyclic alkanes, straight-chain, branched-chain and cyclic ethers, said compound comprising at least one carbon-hydrogen bond and being free from —C(O)— functional groups; B. reacting said compound with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond, to obtain a compound wherein at least one carbon-hydrogen bond has been replaced by a carbon-fluorine bond. Compositions of partially fluorinated compounds obtained with the process are also disclosed.
摘要:
A process for fluorinating hydrocarbon compounds, which comprises: A. providing a compound selected from the group consisting of straight-chain, branched-chain and cyclic alkanes, straight-chain, branched-chain and cyclic ethers, said compound comprising at least one carbon-hydrogen bond and being free from C(O)— functional groups; B. reacting said compound with fluorine in the presence of at least one (per)haloolefin comprising at least one carbon-carbon double bond and having at least one fluorine or chlorine atom on either one of the carbon atoms of said double bond, to obtain a compound wherein at least one carbon-hydrogen bond has been replaced by a carbon-fluorine bond. Compositions of partially fluorinated compounds obtained with the process are also disclosed.
摘要:
The invention pertains to a process for the manufacture of a perfluorovinylether by hydrodehalogenation of a halofluoroether (HFE) having general formula (I-A) or (I-B): RfO—CRf′X—CRf″Rf′″X″ (I-A) wherein Rf represents a C1-C6 perfluoro(oxy)alkyl group; Rf′, Rf″ and Rf′″, equal or different from each other, independently represent fluorine atoms or C1-C5 perfluoro(oxy)alkyl groups; X and X′, equal or different from each other, are independently chosen among Cl, Br or I; wherein Rf* and Rf*′, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoro(oxy)alkyl groups; Y1 and Y2, equal or different from each other, independently represent fluorine atoms or C1-C3 perfluoroalkyl groups; X and X′ are as above defined; said process comprising contacting said halofluoroether (HFE) with hydrogen in the presence of a catalyst comprising palladium and at least one transition metal (M) selected from the group consisting of the metals of group VIIIB, other than palladium, and of group IB.
摘要:
VDF-based curable fluoroelastomers having glass transition temperature lower than −35° C. and an amount of —COF end groups in the polymer lower than the sensitivity limit of the method using the FT-IR spectroscopy described in the present application.
摘要:
A process is provided for the preparation of difluoroacetic acid from tetrafluoroethylene. The process comprises reacting tetrafluoroethylene with an aqueous solution of an inorganic base, optionally in the presence of an organic solvent.