摘要:
Amorphous perfluorinated copolymers, comprising cyclic perfluorinated units deriving from at least two different perfluorinated comonomers, optionally with units deriving from a perfluorinated monomer containing at least one olefinic unsaturation (perfluoroolefin), or comprising cyclic perfluorinated units and units deriving from a perfluorinated monomer containing at least one olefinic unsaturation, said perfluorinated copolymers having the following combination of properties:
substantial absence of unstable polar end groups, polymer Tg higher than 120°C, narrow monomeric composition distribution.
摘要:
A process for fluorinating hydrogenated ether compounds by direct reaction with elemental F 2 diluted with an inert gas, wherein the starting compound is in the liquid phase, said fluorination being carried out in the presence of a perfluoropolyether compound and of an alkali metal fluoride.
摘要:
Process for the preparation of chloro-oxy-halo-compounds by means of the direct reaction between FCl and organic compounds having a molecular structure wherein an oxygen atom is directly linked to a carbon atom in the carbonyl form, in the presence of a catalyst constituted by an alkali metal or alkali-earth metal fluoride, preferably selected from K, Rb, Cs, Ba, Sr, the reaction being carried out continuously in the gas phase.
摘要:
The new compound bromofluoroethylhypofluorite, having the formula CF₂BrCF₂OF is obtained by starting from by the reaction in gaseous phase with fluorine, in the presence of a catalyst constituted by CsF on a support constituted by copper (or by another metal) in the form of a porous material having a surface area of at least 0.1m²/g.
摘要:
A process for fluorinating hydrogenated ether compounds by direct reaction with elemental F 2 diluted with an inert gas, wherein the starting compound is in the liquid phase, said fluorination being carried out in the presence of a perfluoropolyether compound and of an alkali metal fluoride.
摘要:
Process for the preparation of chloro-oxy-halo-compounds by means of the direct reaction between FCl and organic compounds having a molecular structure wherein an oxygen atom is directly linked to a carbon atom in the carbonyl form, in the presence of a catalyst constituted by an alkali metal or alkali-earth metal fluoride, preferably selected from K, Rb, Cs, Ba, Sr, the reaction being carried out continuously in the gas phase.
摘要:
Amorphous (per)fluorinated polymers containing an amount lower than 0.05 mmoles/kg polymer of each of the following ionic end groups: COF, COOH, their amidic derivatives, esters or salts, when the used determination method for said end groups is the IR spectroscopy by Nicolet® Nexus FT-IR equipment (256 scannings, resolution 2 cm -1 ).