Abstract: A process for preparing 1,1-dihalo-1,2,2,2-tetrafluoroethanes by isomerization of 1,2-dihalotetrafluoroethanes at their reflux temperature, by using, as a catalyst, the reaction product prepared "in situ" from an anhydrous aluminum halide with at least equimolecular amounts of the isomer, 1,1-dihalo-1,2,2,2-tetrafluoroethane in a medium consisting of 1,2-dihalotetrafluoroethane. The products find application as intermediates for pyrethroid insecticides.

Abstract: Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p.-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a ketone of the formula:Ch.sub.3 --CO--CH.sub.2 --R (I)wherein R is hydrogen, a halogen, or an alkyl-carboxylic group.

Abstract: An improved process is provided for synthesizing monosubstituted (1-phenylethyl) hydroquinone in high yields and with little contamination by disubstituted (1-phenylethyl) hydroquinone. The process is performed by reacting styrene and hydroquinone using a zeolite molecular sieve.

Abstract: Vulcanizable fluoroelastomer compositions having as base a copolymer of vinylidene fluoride (from 40 to 84 mol %) with perfluoropropene (15 to 30 mol %) and with tetrafluoroethylene (0.30 mol %) and containing a vulcanizing agent of the polyhydroxy compound type, an accelerator of the aminophosphinic compound type, metal oxides and/or hydroxides of basic character and an alkyl, cycloalkyl or aryl compound from the group of phosphoric esters, aminophosphoric esters, sulfoxides and sulfones.

Abstract: Process for the preparation of phenylpropanones having formula: ##STR1## R and R.sub.1, equal or different, being C.sub.1 -C.sub.4 alkyl groups or being coincident in the CH.sub.2 group of a heterocyclic ring, wherein the corresponding allylbenzenes are catalytically epoxidized by means of H.sub.2 O.sub.2, in a biphase system comprising an aqueous phase containing H.sub.2 O.sub.2 and an organic phase containing said allylbenzenes, a solvent immiscible with said aqueous phase and a catalyst having formula Q.sub.3 XW.sub.4 O.sub.24 (Q being a quaternary cation containing hydrocarbylic groups having on the whole from 20 to 70 C atoms, and X being P or As) and wherein the thus obtained epoxides are isomerized by heating at 90.degree.-150.degree. C., in the presence of catalytic amounts of LiI.

Abstract: There are disclosed compounds having general formula (I): ##STR1## wherein: X is H, a phenyl, phenylalkyl, phenylcarbonyl, phenyloxy group, optionally substituted with a halogen; Y is N or CH; R.sup.1 is H or a phenyl group; R.sup.2 and R.sup.3, equal or different, are H, an alkyl, alkoxy group or together they are an atom of ketonic oxygen; R.sup.4 and R.sup.5, equal or different, are H or an alkyl group; R.sup.6 and R.sup.7, equal or different, are H, an alkyl group or one of them forms with R.sup.2 or R.sup.3 an alkylidenic or etheric bridge; or they form a dioxyalkylidenic or alkylidenic ring; m=0, 1; n=0, 1, 2, 3. The compounds are endowed with fungicide and systemic properties.

Abstract: Acrylic diesters of bisphenol-alkyl-ether of formula: ##STR1## in which R.sub.1 and R.sub.2 may be a halogen or a C.sub.1 -C.sub.7 alkyl radical optionally halogen-substituted, and R.sub.3 may be hydrogen, halogen, or a C.sub.1 -C.sub.7 alkyl radical optionally halogen-substituted. Polymers obtained from the acrylic diesters of bisphenol-alkyl-ether of formula (1) and dental composites containing said acrylic diesters.

Abstract: Compounds suitable for being used as lubricants, having general formula:(I) RO--(C.sub.3 F.sub.6 O).sub.m --(CFXO).sub.n --CFX--L, or(II) R"CFXO--(C.sub.3 F.sub.6 O).sub.x (CFXO).sub.y --(C.sub.2 F.sub.4 O).sub.z --(CFX--L, whereR=--CF.sub.3, --C.sub.2 F.sub.5, --C.sub.3 F.sub.7X=F, --CF.sub.3R"=F, --CF.sub.3, --C.sub.2 F.sub.5m=an integer from 3 to 100n=a finite integer, or=zero, wherefore m+n ranges from 3 to 100, provided that, if n is finite, m/n ranges from 5 ro 20 and R is preferably=CF.sub.3, if n=zero, R is preferably --C.sub.2 F.sub.5 or --C.sub.3 F.sub.7x=a finite integer, or=zeroy, z=finite integers, such that x+y+z ranges from 5 to 200, while x+z/y ranges from 5 to 0.5, provided that when x=zero, z/y ranges from 1 to 0.5 and y+z ranges from 5 to 200 n while X is preferably F, and R"=LL=group A--Y, whereA=--CH.sub.2 O--, --CH.sub.2 --O--CH.sub.2, --CF.sub.2, CF.sub.2 O--,Y=an organic radical covered by one of the following formulas: ##STR1## where R.sub.1, R.sub.2 =alkyls C.sub.1 -C.sub.3,E=CHR.

Abstract: Dispenser for the slow release of volatile pheromones comprising an adsorbing substrate of fibrils and/or fibers or their mixtures containing the active ingredient adsorbed or dispersed therein and coated with a layer which is impermeable to pheromones.

Abstract: Thermoplastic compositions based on polyphenylenether resins, endowed with improved mechanical, thermal and solvent-resistance characteristics, comprising, for 100 parts by weight of polyphenylenether resin:(a) from 0 to 90 parts by weight of a thermoplastic polymer other than polystyrene and incompatible with the polyphenylenether resin, and(b) from 1 to 90 parts by weight of a polymeric compatibility-promoting agent comprising one or more blocks of vinylacromatic monomeric units compatible with the polyphenylenether resin, and one or more blocks of monomeric units of the same nature as the thermoplastic polymer (a), or compatible with that polymer.

Abstract: Two-component fibers, having surface area of at least 1 m.sup.2 /g, suited for replacing cellulose fibers in the manufacture of paper and paper-like products comprise a core of olefinic polymer and from 2 to 50% by weight of a sheath of a hydrophilic polymer, and exhibit values of the tenacity higher than 3,000 meters and cohesion higher than 300 meters. They are prepared by extruding a stable emulsion formed by a mixture of a solution of the olefinic polymer with a solution of the hydrophilic polymer in reciprocally immiscible solvents, at a temperature exceeding the boiling temperature of the solvent of the olefinic polymer and at least equal to the dissolution temperature of such polymer in such solvent, in a medium at a lower pressure, by using a volume ratio of solvent for the olefinic polymer to solvent for the hydrophilic polymer of at least 2.5 and concentrations of hydrophilic polymer in its solution of at least 2 g/l of solvent.

Abstract: Described herein are .alpha.-(1-triazolyl)-keto-derivatives of general formula: ##STR1## wherein R is phenyl or heteroaryl, optionally substituted, alkyl; R.sup.1 is alkoxyl, optionally substituted aryloxy, alkyl, alkenyl, alkynyl, alkoxyalkyl, alkoxycarbonyl, cyano, optionally substituted phenyl, or, along with R.sup.2, an alkylidene; R.sup.2 is H or, along with R.sup.1, an alkylidene; R.sup.3 is alkylcarbonyl, alkoxycarbonyl, arylcarbonyl, cyano or alkoxyalkylcarbonyl; such compounds being endowed with a high fungicidal activity.

Abstract: Highly functional fluorinated polyisocyanates of the formula: ##STR1## wherein Z.sub.1 represents the functional group --O--CO--NH--R--NCO;Z.sub.2 represents the difunctional group --O--CO--NH--R--NH--CO--O--;R.sub.f is a radical derived from fluoropolyethers having a molecular weight between 500 and 7000;T represents a trivalent or tetravalent radical derived from a polyol;q is zero or 1; ands is 1 or 2.Also, varnishes containing said highly functional fluorinated polyisocyanates of formula (I).

Abstract: A method of protecting useful cultivations from the toxic action of nonselective herbicides, consisting in using, as antidotes, 2- or 4-thiazolidine-carboxylic acids and derivatives thereof.

Abstract: Disclosed are catalysts for the polymerization of ethylene and of mixtures thereof with olefins, comprising the product obtained by reacting the following components:(a) an Al-alkyl compound;(b) an electron-donor compound containing at least a nitrogen atom, said compound being reactive towards MgCl.sub.2, but not towards Al-triethyl; and(c) the reaction product between a titanium compound containing at least a titanium-halogen bond and an anhydrous magnesium halide.The obtained (co)polymers have a very narrow molecular weight distribution which renders them particularly suitable for some applications, such as injection molding.

Abstract: A process for the manufacture of o-nitrobenzaldehyde by oxidation of o-nitrotoluene, characterized in that o-nitrotoluene is made to react with an aqueous solution containing Cerium.sup.iv perchlorate and from 5 to 9 moles/liter of perchloric acid; according to a preferred embodiment, the dispersion of o-nitrotoluene in an aqueous solution containing from 5 to 9 moles per liter of perchloric acid is first prepared and then an aqueous solution is gradually added, containing Cerium.sup.iv perchlorate and 5-9 moles/liter of perchloric acid.

Abstract: Apparatus for preparing spherical, submicronic, monodispersed, and non-agglomerated particles of metal oxides by reacing with steam a gaseous stream containing an aerosol of liquid particles of a hydrolyzable metal compound. The apparatus is characterized in that into a duct, in which an inert gas stream containing vapors of a hydrolyzable metal compound flows, there is fed through a nozzle a cold inert gas stream, the temperatures and flows of the two gaseous streams being such as to establish in the duct a temperature lower than the condensation temperature of the metal compound; the mixed gaseous streams having a turbulent flow in the duct, with a Reynolds number equal to or higher than 1800. At the duct outlet, the aerosol of metal compound liquid particles, which has formed in the duct, is caused to react with steam, wherefore solid particles of hydrated metal oxide form, which are subsequently calcined to the oxide.

Abstract: Derivatives of 2- or 4-thiazolidine-carboxylic acid having an acyl group in position 3 are herein described.Said compounds are endowed with a phytogrowth regulating and biostimulating action.

Abstract: Silane quinacridone dyes, composite pigments obtainable therefrom by association with an inorganic substrate, and the processes for preparing them. The dyes have the general formula: ##STR1## wherein X is an --SO.sub.2 NHR group, where R is an alkyl group, linear or branched, having from 1 to 6 carbon atoms, a cycloalkyl group, a phenyl group optionally substituted by one or more alkyl or alkoxy groups (C.sub.1 -C.sub.6), a halogen;Y and Z indicate a silane group having the formula: ##STR2## wherein R.sub.1 is an alkoxy group (C.sub.1 -C.sub.2), R.sub.2 is an alkyl group (C.sub.1 -C.sub.4) or a phenyl group; n is 3, 4 or 5; q is 0 or 1; p and m are integers, such that when q is 1, p is 2 and m is 0, 1 or 2, and when q is 0, p is 3 and m is 0, 1, 2 or 3; W indicates an --SO.sub.3 H group; a, b and c are 0 or 1, selected in such a way that the sum a+b+c is equal to 1.

Abstract: The die includes a body provided with a plurality of polymer flow channels and a plate fixed to the front surface of the body and bored at locations corresponding to each channel. An insulating layer is positioned between the body and the bored plate. The channels include a thermoregulating system for the die body. A plurality of nozzles is provided, with the nozzles being rooted inside the die body at locations corresponding to the channels. The nozzles protrude from the body itself to cross through the insulating layer and the bored plate. The nozzles are made of a metal having a thermal conductivity higher than 60 W/m.degree.K.