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: Process for the synthesis of perfluoroalkenyl-sulfonyl fluorides of formula:R.sub.f --CF.dbd.CF--SO.sub.2 Fwherein:R.sub.f is F or a perfluoroalkyl of from 1 to 9 carbon atoms, consisting in bringing a perfluoroalkyl-(sulfonyl fluoride) monofluoroacetyl-fluride of formula R.sub.f --CF.sub.2 --CF(COF)SO.sub.2 F into contact with a reactant constituted by a carbonate of a metal belonging to Groups IA, IIA and IIB of the Periodical Table of the Elements at a temperature comprised within the range of from 150.degree. to 400.degree. C., and then recovering the desired product.The process is run in continuous.

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: The fluidity at low temperatures of compositions based on liquid hydrocarbons from refining is improved by the addition, preferably in solution, of ethylene/propylene/(conjugated diene) copolymers or terpolymers, containing 20-55% of propylene, optionally degraded by thermo-oxidation, and structurally characterized by values of at least one of X.sub.2 and X.sub.4 parameters, which are equal to, or lower than, about 0.02, indicative of the absence in the polymeric chain of propylene linking inversions.

Abstract: A perfluorosuccinylfluoride is prepared by the reaction of a gaseous mixture of 1,4-dibromoperfluorobutane with SO.sub.3 in oleum with at least 65% of free SO.sub.3 containing a catalyst comprising, besides mono- and bi-valent mercury sulphates, B.sub.2 O.sub.3 in quantities of from 0.3% to 8% by weight with respect to the free SO.sub.3 present in the "oleum" during course of the reaction.

Abstract: Use of perfluoropolyethers having perfluoroalkyl end groups with a molecular weight ranging from 500 to 1500, in amounts from 0.5 to 3 parts by weight per 100 parts by weight of elastomer and, optimally, in combination wit polytetrafluoroethylene having a molecular weight lower than about 200,000, as additives to the polymerization latex of rubbers vulcanizable by means of peroxides in order to improve the detachability of the vulcanizate from forming molds.

Abstract: The present invention illustrates a process for preparing cleansing emulsions for beauty treatment. A perfluoropolyether having perfluoroalkyl end groups and one or more substance(s) selected from among surfactants, oils, fats and polyalcohols having a low interface tension with the perfluoropolyether, wherein at least one from these substances is a surfactant, are used. The several components of the cleansing emulsions are mixed according to a particular sequence, and with particular modalities.

Abstract: In the process for preparing chlorotrifluoroethylene telomers by reaction of chlorotrifluoroethylene with CF.sub.3 CF or R.sub.x --CF.sub.2 OF (wherein R.sub.x may be also a perfluoroalkyl radical having 1 to 10 carbon atoms), the content of telomers with end groups --F is increased or mixtures of telomers containing species with end groups --Cl are obtained by adding F.sub.2, according to particular modalities, to the reaction medium.

Abstract: Catalysts for the polymerization of olefins, obtained by means of the reaction of:a) a compound of a transition metal containing at least one metal-halogen linkage, supported on a magnesium halide in the active form, withb) a compound of Ti, Zr or Hf, containing at least one metal-carbon linkage.

Abstract: Novel fluorinated alkoxy imines having the formula:R.sub.x --CF.dbd.N--O--CZ.sub.1 Z.sub.2 --CF.sub.3 (I)wherein:R.sub.x is either F or a perhalogenated alkyl group containing from 1 to 3 carbon atoms, andZ.sub.1 and Z.sub.2, either equal to, or different from, each other, are F, C1, Br, H or a perfluorinated alkyl group containing 1 to 3 carbon atoms. They are prepared by reacting a fluorinated alkoxy-amine having the formula:R.sub.x --CF.sub.2 --NH--O--CZ.sub.1 Z.sub.2 --CF.sub.3 (V)with Kf at a temperature within the range of from 0.degree. to 100.degree. C. Furthermore, N-chloro- and N-bromo-derivatives of said fluorinated alkoxy-imines (I) are provided, which derivatives have the formulae:R.sub.x --CF.sub.2 --NCl--O--CZ.sub.1 Z.sub.2 --CF.sub.3 (VII)andR.sub.x --CF.sub.2 --NBr--O--CZ.sub.1 Z.sub.2 --CF.sub.

Abstract: The present invention relates to a process for protecting stone materials, marble, tiles and cement as well as articles manufactured from these materials from the decay caused by the atmospheric agents and pollutants. The process uses a mixture consisting of:1) polytetrafluoroethylene in the form of an aqueous dispersion,2) an emulsion or a microemulsion of perfluoropolyethers either having or not having functional groups at their ends which is applied onto the surface of the materials or articles.

Abstract: The present invention relates to the synthesis of new terminal olefins, perfluoro 2,4-dimethyl 3-ethylpentene and perfluoro 2-isopropyl 3,3-dimethylbutene, and to the subsequent fluorination thereof in order to obtain highly branched perfluoroalkanes, capable of providing perfluoroalkyl radicals, which are utilizable as initiators for the polymerization of ethylenically unsaturated monomers.

Abstract: Protecting marble, stone, tiles, cement, and similar materials utilized in the building industry from the action of atmospheric agents and pollutants, which comprises applying a perfluoropolyether having perfluoroalkyl end groups onto the surface of the article, said perfluoropolyether being in the form of an aqueous microemulsion.

Abstract: A process for preparing 1,2-difluoroethane or 1,1,2-trifluoroethane by hydrogenation of 1,2-dichlorodifluoroethylene or 1-chlorotrifluoroethylene in the presence of a hydrogenation catalyst. The process is conducted in the gas phase at a temperature ranging from 100.degree. C. to 220.degree. C., the molar ratios between H.sub.2 and olefin being higher than 3.

Abstract: This invention relates to preparing perfluoropolyethers having neutral end groups by a process based on the photooxidation of C.sub.3 F.sub.6 and/or C.sub.2 F.sub.4, thereby obtaining controlled molecular weight products having perfluoroalkyl or perfluorochloroalkyl neutral end groups, with high yields of useful products.

Abstract: An electrochemical process, in which a gaseous matter is reduced at the cathode and in which microemulsions of the water-in-oil (w/o) type are utilized as catholytes, the microemulsions having ionic electric transfer and matter interphase transfer capacities, and in which the oil phase consists of a perfluoropolyether having perfluoroalkyl end groups or functional end groups of the hydrophilic type, or of perfluorocarbons, the microemulsions being obtained by the use of perfluorinated surfactants, in particular those having a perfluoroalkylpolyether structure and/or by the use of an alcohol as a co-surfactant.

Abstract: Fluorinated polyurethanes containing blocks having a perfluoropolyethereal structure, with rubber-like properties, alternated with stiff structural units are taught. The stiff units are at least partially provided with a double bond of the olefinic type, which is suitable for causing the cross-linking of the polymeric chains with a cross-linking system of the radicalic type.

Abstract: Heterocyclic (poly)peroxycarboxylic acids having a N-amidic heteroatom, which have the formula:R--(CH.sub.2).sub.m --R' (I)wherein:R and R', alike or different from each other, represent hydrogen atoms or a group: ##STR1## with the proviso that at least one of R and R' shall be different from H, and wherein the other symbols have the following meaning:R" represents a hydrogen atom or any other substituent non-reactive in the presence of the active oxygen of the peroxycarboxylic group and/or under the preparation conditions;m represents a number between 1 to 12;n represents a number selected from 0, 1 and 2;p represents a number between 1 and 3;their process of preparation and their use as bleaching agents.

Abstract: The present invention relates to a process for preparing copolymers of tetrafluoroethylene with ethylene, and optionally with a third monomer, of vinylic character.The process is characterized in that tetrafluoroethylene is caused to react with ethylene and with the optional third, vinylic, monomer in an aqueous emulsion with the aid of a polymerization initiator of peroxy type, at a temperature within the range between 30.degree. and 95.degree. C. and under a pressure within the range of from 1.5 to 4.0 MPa, in the presence of tert.-butyl alcohol and of 1,1,2,2-tetrachloro-1,2-difluoroethane.

Abstract: A process for the consolidation of discrete, particulate, low-melting or liquid materials, characterized in that said materials are consolidated in their particulate discrete form by application of vapors of at least one p-xylylene monomer and/or of a derivative thereof, which is polymerized under vacuum. The materials are thus given the surface characteristics of a solid, with enhanced properties of mechanical, physical and/or chemical strength, even in the presence of high temperatures. The invention is particularly useful for the metered addition of predetermined amounts of compositions or for moving mechanical parts.