Abstract: A process for the preparation of perhaloacyl peroxides from perhaloacyl halides which is performed in the presence of a hydrofluoroether as the solvent.

Abstract: A perfluorodiacyl peroxide represented by the following formula (1): (C5F11COO)2 ??(1). Also disclosed is a solution containing the perfluorodiacyl peroxide, a polymerization initiator containing the perfluorodiacyl peroxide, a method for producing a polymer which includes polymerizing a radically polymerizable monomer with the perfluorodiacyl peroxide, and a perfluoroacyl chloride represent by the following formula (2): C5F11COCl (2).

Abstract: The present invention provides a process for producing a perfluoropolyoxyalkylene peroxide compound comprising a step of reacting a perfluoroalkene with oxygen, wherein the reaction of the perfluoroalkene with oxygen is performed under ultraviolet irradiation and in the presence of a fluorine source.

Abstract: Chiral liquid crystal compounds of the general formula (1): in which at least one of R1 and R2 is a chiral substituent, K may be a single bond or the same as K1-5 and K1-5 denote a six-membered ring system which rings may be at least partially unsaturated, wherein the number of atoms in these rings or ring systems between the two atoms forming a part of the link to the next ring, or to one of the substituents R1 and R2, does not differ by more than one if counted in the clockwise, and in the counter-clockwise sense, starting from the same atom in each case, X1-20 denote alkyl, or alkoxy, or fluorinated alkyl, or fluorinated alkoxy groups, or atom H, or halogen atoms, mixtures comprising such chiral liquid crystal compounds, and liquid crystal displays comprising such mixtures as active ingredients

Abstract: In a process for oxidizing a hydrocarbon to a corresponding hydroperoxide, alcohol, ketone, carboxylic acid or dicarboxylic acid, the hydrocarbon is contacted with an oxygen-containing gas in the presence of a catalyst comprising a cyclic imide of the general formula (I): wherein each of R1 and R2 is independently selected from hydrocarbyl and substituted hydrocarbyl radicals having 1 to 20 carbon atoms, or from the groups SO3H, NH2, OH and NO2, or from the atoms H, F, Cl, Br and I provided that R1 and R2 can be linked to one another via a covalent bond; each of Q1 and Q2 is independently selected from C, CH, N and CR3; each of X and Z is independently selected from C, S, CH2, N, P and an element of Group 4 of the Periodic Table; Y is O or OH; k is 0, 1, or 2; 1 is 0, 1, or 2; m is 1 to 3, and R3 can be any of the entities listed for R1.

Abstract: The progression of hepatic fibrosis and hepatic cirrhosis caused by various hepatic disorders and damages such as chronic hepatitis can be restrained by hepatic fibrosis inhibitor containing a compound represented by the following chemical formula: wherein, R1 represents an alkyl group with a carbon number of 4 to 8, and R2 represents a hydrogen atom, alkylcarbonyl group with a carbon number of 2 to 6, or alkoxycarbonyl group with a carbon number of 2 to 6.

Abstract: A process for preparing peroxidic perfluoropolyethers having a perioxidic content (PO) lower than or equal to 1.2 of formula A-CF2O(CF2CF2O)m(CF2O)n—(CF2CF2OO)ml(CF2OO)n1CF2—B??(I) Wherein A, B equal to or different from each other are —C1, —F, —F2CC1, —COF, —OCOF, —CF3, m, m1, n, n1 are integers such that the (m+m1)/(n+n1) ratio is between 0.6 and 1.3 and the m/n ration is between 0.5 and 1.2; the number average molecular weight is in the range 35,000-45,000, by tetrafluoroethylene (TFE) photooxidation in the presence of UV light, at a temperature from ?80° C. to ?40° C., in the presence of a mixture of solvents formed of HFC-227 (hepta-fluoropropane) and a solvent selected between HFC-125 (pentafluoroethane) and FC-218 (perfluoropropane).

Abstract: The invention relates to a process for the liquid phase oxidation of ethylbenzene into ethylbenzene hydroperoxide, wherein the ethylbenzene hydroperoxide concentration is kept below 20 wt. % on the basis of the total weight of the reaction mixture, and wherein styrene and/or a styrene derivative is fed to the ethylbenzene. The concentration of said styrene and/or a styrene derivative may be from 0.01 to 5.0 wt. %.

Abstract: A process for preparing peroxidic perfluoropolyethers having a peroxidic content (PO) higher than 1.2 of formula A-CF2O(CF2CF2O)m(CF2O)n—(CF2CF2OO)ml(CF2OO)nlCF2—B??(I) wherein A, B, equal to or different from each other are Cl—, F—, ClCF2—, COF—, —OCOF, —CF3, m, ml, n, nl are integers such that the (m+ml)/(n+nl) ratio is between 0.9 and 5 and the m/n ratio is between 0.8 and 3, the number average molecular weight is in the range 35,000-45,000, by tetrafluoroethylene (TFE) photooxidation in the presence of UV light, at a temperature from ?80° C. to ?40° C., in the presence of a mixture of solvents formed of HFC-227 (heptafluoropropane) and a solvent selected from HFC-125 (pentafluoroethane) and FC-218 (perfluoropropane).

Abstract: Perfluorodiacylperoxides having the following structures: wherein: when Rf is F, Rf?, Rf? are both —CF3; when Rf is —CF3, Rf?, Rf? are C1–C3 linear or branched perfluoro-oxyalkyl groups; said perfluorodiacylperoxides being such as to meet the following proviso: the thermal decomposition constants Kd (sec?1) in the presence of water do not undergo substantial variations with respect to the thermal decomposition constants in absence of water.

Abstract: Perfluoropolyethers having structural formula R1O—(CF2O)n—(CF2CF2O)mR2??(I) wherein: R1 is —CH3 or —C2H5; R2 is equal to R1 or —CF2H n is 0 or an integer from 1 to 100; m is an integer from 1 to 100 or, when R2 is —CF2H, m can also be 0; the oxyfluoro-alkylene units —(CF2CF2O)— and —(CF2O)— are statistically distributed along the polymer chain.

Abstract: The invention relates to a method for oxidizing substrates such as hydrocarbons, waxes or soot. The method involves the use of a compound of formula (I) in which: R1 and R2 represent H, an aliphatic or aromatic alkoxy radical, carboxyl radical, alkoxycarbonyl radical or hydrocarbon radical, each having 1 to 20 hydrocarbon atoms, SO3H, NH2, OH, F, Cl, Br, I and/or NO2, whereby R1 and R2 designate identical or different radicals or R1 and R2 can be linked to one another via a covalent bonding; Q1 and Q2 represent C, CH, N, CR5, each being the same or different; X and Z represent C, S, CH2, each being the same or different; Y represents O and OH; k=0, 1, 2; l=0, 1, 2; m=1 to 3, and; R5 represents one of the meanings of R1. Said compound is used as a catalyst in the presence of a radical initiator, whereby the molar ratio of the catalyst to the hydrocarbon is less than 10 mol %. Peroxy compounds or azo compounds can be used as the radical initiator. Preferred substrates are aliphatic or aromatic hydrocarbons.

Abstract: Aqueous compositions of (per)fluoropolyether phosphates of formula: T—O—[Rf—CFY—L—O]P(O)(O−Z+)(OH); and/or  (A) (OH)m(O−Z+)2-mP(O)[O—L—YFC—O—Rf—CFY—L—O—P(O)(O−Z+)]m′— —[O—L—YFC—O—Rf—CFY—L—O]P(O)(O−Z+)2-m(OH)m  (B) and use thereof to confer oleo-repellence to the paper in bulk by means of the wet-end method.

Abstract: A new class of low temperature initiators has been found, enabling fluoroolefin polymerizations at relatively low temperatures. These initiators are diacyl peroxides which allow improved productivity and product properties, as well as more favorable reaction conditions.

Abstract: Aqueous compositions of (per)fluoropolyether phosphates of formula:

Abstract: This invention relates to a process for the synthesis of diacyl peroxide by contacting acyl halide and peroxide complex in liquid or supercritical carbon dioxide.

Abstract: Perfluoroether acylperoxides having an average equivalent weight in the range of 350-5000, and of the following formulae: Y′—(CF2—CF(CF3)O)m—(CX′FO)n—CF2CO—O—O—CO—CF2—(OCX′F)n—(OCF(CF3)—CF2)—Y′  (I) wherein Y′=Cl, ORf wherein Rf is a C1-C3 perfluoroalkyl; m, n are integers such that the average equivalent weight of (I) is in the range of 350-5000 and m/n≧40; X′=F, CF3; T—CF2—O—[(CF2CF2O)p—(CF2O)q—CF2—CO—O—O—CO—CF2(OCF2)q—(OCF2CF2)p]y—OCF2—COOH  (II) wherein y is an integer comprised between 1 and 5; p and q are integers such as to give the above mentioned EW and p/q=0.5 to 2.0; T=COOH, F with the proviso that when T=COOH y=1-5, when T=F then y=1, and processes for manufacturing them.

Abstract: A process for the faster manufacturing of hydrocarbon, fluorocarbon and chlorocarbon acyl peroxides is disclosed wherein a hydroxide, a peroxide and an acyl halide are reacted under continuous vigorous agitation conditions so as to bring the reaction to substantial completion is less than one minute.

Abstract: Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising:(A) from 2 to 40% by weight of PTFE in powder form;(B) from 50 to 95% by weight of an organic solvent;(C) from 0.5 to 10% by weight of a dispersing agent of formula:(R.sub.H -L).sub.y -(R.sub.F -L).sub.x R.sub.H (I)whereinx is an integer from 1 to 3;y is 0 or 1, with the proviso that x=1 when y=1;R.sub.H is a x-functional radical having an alkylic or polyoxyalkylenic structure;R.sub.F is (per)fluoropolyoxyalkylenic radical;L is a divalent organic group.Such dispersions are utilized for the surface treatment of metals, glass fibers, and the like, and in particular as mould release agents.

Abstract: A process for the faster manufacturing of hydrocarbon, fluorocarbon and chlorocarbon acyl peroxides is disclosed wherein a hydroxide, a peroxide and an acyl halide are reacted under continuous vigorous agitation conditions so as to bring the reaction to substantial completion is less than one minute.

Abstract: Polytetrafluoroethylene (PTFE) dispersions in an organic solvent, comprising:(A) from 2 to 40% by weight of PTFE in powder form;(B) from 50 to 95% by weight of an organic solvent;(C) from 0.5 to 10% by weight of a dispersing agent of formula:(R.sub.H --L).sub.y --(R.sub.F --L).sub.x R.sub.H (I)wherein:x is an integer from 1 to 3;y is 0 or 1, with the proviso that x=1 when y=1;R.sub.H is a x-functional radical having an alkylic or polyoxyalkylenic structure;R.sub.F is (per)fluoropolyoxyalkylenic radical;L is a divalent organic group.Such dispersions are utilized for the surface treatment of metals, glass fibers, and the like, and in particular as mold release agents.

Abstract: Tetrafluoroethylene oxidation process comprising the step of oxidizing tetrafluoroethylene in solution at temperatures between -80.degree. C. and -50.degree. C. in the presence of ultraviolet radiation, oxygen and perfluoroethane (125) as solvent to obtain peroxidic perfluoropolyethers.

Abstract: Tetrafluoroethylene oxidation process at temperatures comprised between -80.degree. C. and -40.degree. C. in the presence of UV radiations and pentafluoropropane as solvent.

Abstract: Tetrafluoroethylene oxidation process at temperatures comprised between -100.degree. C. and -40.degree. C., in absence of Uv radiations, and by operating in the presence of a chemical initiator containing at least one F--X bond, wherein X is oxygen or halogen, in the presence of a solvent comprising an amount of COF.sub.2 higher than 8% by moles.

Abstract: Peroxy perfluoropolyoxyalkylenes are prepared with high yields by carrying out the photo-oxidation of tetrafluoroethylene with molecular oxygen, by means of ultraviolet radiations, operating in the presence of pentafluorochloroethane as a solvent for tetrafluoroethylene.Thus, it is possible to obtain peroxy perfluoropolyoxyalkylenes having a viscosity at 20.degree. C. ranging from 300,000 to 8,000,000 cSt and endowed with a peroxide content not higher than 4.Such perfluoropolyoxyalkylenes provide, through chemical reduction, perfluoropolyoxyalkylenes endowed with a functionality higher than 1.9 and at the same time with a high molecular weight.

Abstract: This invention provides 1) novel reactive fluorinated compounds derived from a specified class of telomers or cotelomers of fluoroolefins; and 2) stable products and stable polymers thereof obtained by reaction or polycondensation of the novel reactive fluorinated compounds with specified classes of hydrogenated aliphatic, alicyclic, aromatic reactive compounds, telechelic oligomers and block polymers wherein said stable products and polymers contain hetero atoms such as oxygen, sulfur or nitrogen and are characterized by high thermal and chemical resistance.

Abstract: The invention relates to new peroxide perfluoropolyethers having formula: ##STR1## wherein: A and B are end groups,X represents a (R'O).sub.m R" group where R' is selected from the class consisting of --CF.sub.2 --, --CF.sub.2 --CF.sub.2 -- and ##STR2## and R" is a perfluoroalkyl group; the value of "m" ranging from 0 to 6. The invention relates also to processes for preparing said perfluoropolyethers and other classes of non peroxide perfluoropolyethers derived therefrom.

Abstract: A process is disclosed for preparing peroxidic perfluoropolyethers comprising perfluoroalkylenoxy units having at least two carbon atoms, characterized in that one or more perfluoroolefins, except tetrafluoroethylene used alone, are reacted with oxygen in the liquid phase at a temperature not exceeding 50.degree. C. and in the presence of one or more compounds having one or more F-X bonds, in which X is selected from the group consisting of F, O and Cl.

Abstract: The present invention relates to a novel antioxidant-peroxide compound of Structure A,(Y--[R--OO--X).sub.x --An].sub.y Ain which the definitions of X, Y, R, An, x, and y are given in the Summary of the Invention section, for example, t-butyl peroxy-3-(3,5-di-t-butyl-4-hydroxypheneyl) propionate, processes for producing polymeric composition of enhanced oxidative stability via initiation of polymerization of ethylenically unsaturated monomers, curing of elastomers and unsaturated polyester resins, modification of polypropylene and other polymers and copolymers, and crosslinking of olefin polymers and copolymers, and the resulting polymers having enhanced oxidative stability.

Abstract: .alpha.-Hydroperoxyisopropylphenyl compounds are useful as an organic hydroxyperoxide content in test compositions for the measurement of peroxide-active substances and are effectively utilized for detecting peroxide-active substances such as blood or hemoglobin (occult blood).Test devices for the detection of occult blood are constituted of a carrier in which organic hydroperoxide, coloration indicator, buffering agent, wetting agent, activating agent and stabilizer are impregnated. If hemoglobin is present in a specimen, the organic hydroperoxide is activated to produce nascent oxygen with which the indicator is oxidized and develops color.

Abstract: This invention concerns novel polymeric perfluoroether acyl peroxides and an improved process for making them.

Abstract: A novel perfluoropolyether containing 0.1 to 10% by weight of halogen atoms as bonded in the molecule is obtained by reacting tetrafluoroethylene with oxygen in a fluorinated solvent or a chlorofluorinated solvent under ultraviolet irradiation in the presence of a halogenated hydrocarbon chain transfer agent having a chain transfer coefficient with respect to methyl methacrylate of at least 5.times.10.sup.-4.

Abstract: Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions comprising a mixture of non-peroxidic polyfluoropolyether compounds, and derivatives of the polyfluoropolyether compositions comprising functional and non-functional derivatives of the polyfluoropolyether compositions are provided. Each peroxidic poly(perfluorooxyalkylene) compound comprises a backbone of randomly distributed perfluorooxyalkylene units, represented by the formulas ##STR1## which when bonded to an --O-- of any of the perfluorooxyalkylene units, forms a peroxy group, --O--O--, which imparts the peroxidic characteristics to the material, and backbone-pendant perfluoroalkoxy groups or perfluoroalkoxy groups substituted with one or more ether oxygen atoms, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR2## backbone units.

Abstract: Normally liquid peroxidic poly(perfluorooxyalkylene) compositions comprising a mixture of peroxidic poly(perfluorooxyalkylene) compounds, derivatives of the poly(perfluorooxyalkylene) compositions comprising a mixture of non-peroxidic polyfluoropolyether compounds, and derivatives of the polyfluoropolyether compositions comprising functional and non-functional derivatives of the polyfluoropolyether compositions are provided. Each peroxidic poly(perfluorooxyalkylene) compound comprises a backbone of randomly distributed perfluorooxyalkylene units, represented by the formulas --CF.sub.2 O--, ##STR1## and --O--, which when bonded to and --O-- of any of the perfluorooxyalkylene units, forms a peroxy group, --O--O--, which imparts the peroxidic characteristics to the material, and backbone-pendant perfluoroalkoxy groups or perfluoroalkoxy groups substituted with one or more ether oxygen atoms, the terminal ether oxygen atoms of which are bonded to carbon atoms of the ##STR2## backbone units.

Abstract: A method of preparing perfluoropolyethers having a regulated molecular weight starting from the product obtained by photochemical oxidation of C.sub.2 F.sub.4 and having a various content of oxygen peroxide, consisting in heat-treating the peroxidized product in order to partially remove the oxygen peroxide till reducing it to a relatively low value, which is prefixed as a function of the molecular weight to be obtained for the final product, and in the subsequent treatment with gaseous fluorine at high temperatures.

Abstract: A novel fluorine-containing diacylperoxide of the formula:[RO--CH.sub.2 CF.sub.2 CF.sub.2 O--.sub.n CH.sub.2 CF.sub.2 COO--.sub.2 (I)wherein R is a C.sub.1 -C.sub.10 hydrocarbon group or halogen-containing hydrocarbon group, and n is an integer of 0 to 3, which can initiate polymerization of an ethylenically unsaturated monomer at a relatively low temperature.

Abstract: A process for the preparation of uniform, stable diacyl peroxide compositions is disclosed. The process comprises reacting the corresponding acyl chloride with hydrogen peroxide in an alkaline aqueous medium in the presence of a desensitizing agent.

Abstract: Cross-linkable organopolysiloxane compositions are disclosed, consisting essentially of an organopolysiloxane and bis(o-chlorobenzoyl)peroxide.

Abstract: An aliphatic or cycloaliphatic hydroperoxide, an olefin such as a 1-aromatic-1-substituted ethylene and a halide corresponding to the ethylene are reacted under essentially anhydrous conditions, in the absence of a free acid, at a temperature below the decomposition temperature of the halide to obtain a peroxide corresponding to the hydroperoxide and the ethylene.Preferably the product peroxide is recovered by treating the reaction product mixture with aqueous alkali metal hydroxide to destroy the halide and hydroperoxide therein; then distilling the treated mixture in the presence of a substantial amount of liquid water at sub-atmospheric pressure to remove overhead impurities.Example: Dicumyl peroxide is prepared by reacting at about 30.degree. C for about 5 hours cumene hydroperoxide, .alpha.-methylstyrene and cumyl chloride, which compounds has been charged to the reaction zone in a mole ratio of 1.25: 0.86: 0.