Abstract: A surface treatment method for imparting -oil- and/or water-repellency, comprising the step of applying to the surface to be treated compositions comprising at least one compound having the formula III ACF2O—(CF2O)n(C2F4O)m—CF2—B  III where n=1-20, m=1-20 and A and B are reactive functional groups chosen independently from the group constituted by: a) CONHR, where R=CnH2n+1 with n=1-30, b) CH2OH, c) CONH(X)SiR1n(OR′)3−n, where n=0-2, R1 and R′, identical or different, are CrH2r+1 alkyl radicals, where r=1-4, and X is a bifunctional alkyl spacer of the (CHR″)m type, where m=1-20, and R″ can be H or CH3, optionally containing heteroatoms, d) —[CH2O(R′″O)p]k—P(O)(OH)3−k, where R′″ is an alkylene radical, for example C2H4 or C3H6, p=1-10 and k=1, 2, the composition comprising the compound at a suitable concentration and being a

Abstract: Fluoroelastomeric compositions peroxy-curable, endowed with improved characteristics of processability and compatibility, and with enhanced low-temperature properties, comprising, as additives, vinylidene fluoride cotelomers having the general formula:R[(CH.sub.2 CF.sub.2).sub.n (C.sub.3 F.sub.6).sub.m (C.sub.2 F.sub.4).sub.p (C.sub.2 F.sub.3 Cl).sub.q ]X (I)wherein:X=Br, I;R is a possible halogenated alkyl radical;n, m, p, q are integers, m, p, q may also be zero.

Abstract: A continuous process for preparing perfluoroalkenyl sulfonyl fluorides (I)R.sub.f --CF.dbd.CF--SO.sub.2 F (I)wherein R.sub.f is selected from the group consisting of F and a perfluoroalkyl of from 1 to 9 carbon atoms is disclosed, in which a perfluoroalkyl (sulfonyl fluoride) monofluoroacetyl fluoride of formulaR.sub.f --CF.sub.2 --CF(COF)SO.sub.2 F (II)is used as the starting product.The starting product is contacted with a reactant selected from the group consisting of the oxides of an element of the Groups IA, IIA, IIB, IIIA and IVA of the Periodic Table of the Elements, and of their mixtures, at a temperature comprised within the range of from 150.degree. to 450.degree. C., and the compound (I) is recovered from the reaction effluent.

Abstract: A continuous process for preparing perfluoroalkenyl sulfonyl fluorides (I)R.sub.f --CF.dbd.CF--SO.sub.2 F (I)wherein: R.sub.f is selected from the group consisting of F and a perfluoroalkyl radical of from 1 to 9 carbon atoms is disclosed, in which as the starting compound a sultone (II) ##STR1## is used. The starting compound is placed into contact with a reactant selected from the group consisting of oxides and carbonates of an element of the Groups IA, IIA and IIB, and of the oxides of an element of the Groups IIIA and IVA of the Periodic Table of the Elements, and their mixtures, at a temperature comprised within the range of from 150.degree. to 450.degree. C., and the compound (I) is recovered from the reaction effluent. and the compound (I) is recovered from the reaction effluent.

Abstract: Perfluorobutadiene and higher alkandienes, with terminal double bonds, are obtained from .alpha.,.omega.-dibromo, .alpha., .omega.,bromo, iodo perfluoroalkanes by dehalofluorination carried out with the aid of an organometallic compounds, in the presence of aprotic solvent belonging to the class of hydrocarbons or polar aprotic solvent belonging to the class of ethers, with limited reaction times.

Abstract: A process for preparing bromodifluoroacetylfluoride characterized in that a gaseous stream of oxygen-diluted ozone is reacted, at temperatures ranging from -100.degree. C. to +80.degree. C., with 1,4-dibromohexafluorobutene-2 optionally dissolved in a solvent which is inert under the reaction conditions, with consequent obtainment of the corresponding ozonide and, subsequently, the ozonide is subjected to a heat treatment at temperatures ranging from 100.degree. to 300.degree. C., with consequent obtainment of bromodifluoroacetylfluoride.

Abstract: A process for fluorinating hydrogenated ethereal compounds by direct reaction with elemental F.sub.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 per fluoropolyetheral compound and of an alkaline metal fluoride.

Abstract: There are prepared compounds of general formula: ##STR1## wherein: R.sub.1 =H, or alkyl or acyl containing from 1 to 10 carbon atoms, R.sub.2, R.sub.3, like or unlike each other, may be H, or an alkyl containing from 1 to 10 carbon atoms and where R.sub.1 and R.sub.2 may form, together, an alkylene group containing from 2 to 10 carbon atoms, and optionally including up to 2 oxygen atoms in the chain, by means of addition reaction induced by radicalic starters of 1,2-dichlorodifluoroethylene to alcohols, ethers or esters of general formula: ##STR2## wherein: R.sub.1, R.sub.2, R.sub.3 are defined as above.

Abstract: Cotelomers of vinylidene fluoride with one or more fluoro olefins, having the general formulaR[(CF.sub.2 CH.sub.2)n (C.sub.3 F.sub.6)m (C.sub.2 F.sub.4)p (C.sub.2 F.sub.3 Cl)q]X (I)wherein:X is either Br or I, R is an alkyl radical eventually containing halogen atoms, n is an integer comprised within the range of from 1 to 30, m is an integer comprised within the range of from 0 to 10, p and q are integers comprised within the range of from 0 to 20, and wherein m+p+q is at least 1, obtained by cotelomerizing monomers in the presence of a telogen RX (wherein R and X have the abovesaid meaning) and of a free-radical polymerization initiator.

Abstract: A process for the preparation of fluoroalkyl ethers of the formula: ##STR1## wherein: Y is Br or F;X is F, Cl or Br or their mixtures when n is equal to or higher than 2;n is within the range of from 0 to 4;R.sub.f represents a perfluoroalkylene radical containing from 1 to 8 carbon atoms.The process is characterized in that a fluoroalkoxy perfluoroacyl fluoride of the formula: ##STR2## is slowly heated with a salifying agent and a solvent, in the presence of a catalytic amount of N,N-dimethylformamide, with an end temperature within the range of from 60.degree. to 150.degree. C. being reached.