Abstract: A process is disclosed for preparing silver powders with a controlled apparent density wherein an aqueous silver oxide suspension is treated with hydrogen at a temperature between 60.degree. and 115.degree. and under a partial hydrogen pressure of between 5 and 25 atmospheres. The aqueous silver oxide suspension may be additioned with one or more alkali metal, alkaline earth metal, or silver sulphides. Further the aqueous silver oxide suspension may be additioned with one or more silver salts soluble in water or made soluble by complexing with ammonia, such as ammoniacal silver sulphate, silver nitrate or ammoniacal silver nitrate.

Abstract: A process is disclosed for the preparation of 2-hydroxybenzanthrone and substituted derivatives thereof having the general formula: ##STR1## wherein: R.sub.1 = H, OHR.sub.2, r.sub.3 = h, cl, --OH, --OCH.sub.3, ##STR2## characterized in that an anthraquinone-1-diazonium salt is reacted with an olefinic compound of the formula: ##STR3## wherein X = CN or OCOCH.sub.3, in an alcoholic medium of a lower monovalent alcohol and in the presence of a catalytic quantity of cuprous chloride, at a temperature between 20.degree. and 100.degree. C, and that the reaction intermediate thus obtained is reacted successively with alkali in alcoholic solution.

Abstract: Derivatives of quinoline-8-carboxylic acid having pesticidal action are disclosed, as are compositions comprising such derivatives.The quinoline-8-carboxylic acid derivatives which we have found to be effective pesticides include such derivatives having the general formula: ##STR1## in which R represents H, halogen, C.sub.1 -C.sub.3 alkyl, C.sub.2 -C.sub.6 alkenyl, CF.sub.3, C.sub.1 -C.sub.3 - alkoxyl or C.sub.1 -C.sub.3 - alkythio;X represents the group OY, in which Y is H, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.2 -C.sub.6 alkinyl optionally substituted, an alkali metal, an alkaline earth metal, a transition metal, Mn, NR.sub.2 in which both R equal or different have the same significance as above or are pyridines, aryl or alkyl or aralkylamines; and the quarternarized nitrogen salts of said compounds.The compounds having formula: I. are distinguished by having good activity as pesticides and, in particular, as insecticides.

Abstract: A plastosoluble fluorescent organic dye is disclosed that is derived from benzanthrone, and having the general formula: ##STR1## wherein X = --H or --Br; and Y = --H, --OCH.sub.3 or --OC.sub.2 H.sub.5. A process for the preparation of a dye of the general formula (I) is also disclosed. These dyes are useful in the bulk dyeing of polystyrene, polymethylmethacrylate, rigid PVC, polyethylene, acrylonitrile/butadiene/styrene copolymers, polycarbonates or mineral oils.

Abstract: Compositions comprising 1,3,5-oxathiazine derivatives and which are highly effective against nematodes but exhibit low toxicity for warm-blooded animals are disclosed.

Abstract: A process for preparing carboxylic acids by reaction of carbon monoxide with aromatic and aliphatic organic halides, optionally further substituted by groups inert under the reaction conditions, and catalyzed by phosphinic palladium complexes and in the presence of quaternary alkyl-ammonium salts, characterized in that said process is conducted in a double liquid phase consisting essentially of (a) the organic halide and the catalytic palladium complex or their solutions in at least one hydrocarbon solvent immiscible with H.sub.2 O, and (b) an aqueous inorganic alkaline solution containing the quaternary alkyl-ammonium salt, at a temperature between about 50.degree. and 150.degree. C. More particularly, the reaction is conducted in the presence of at least one catalyst selected from among:A. at least one palladium complex of the formula:Pd[P(R).sub.3 ].sub.mwherein m is a whole number from 2 to 4, and (R).sub.

Abstract: This invention relates to new flame-extinguishing agents for polymers and to self-extinguishing compositions based on polymers or copolymers of ethylene and of alpha-olefins and containing the above-mentioned flame-extinguishing agents.

Abstract: A process is disclosed for the carboxylation of organic substrates or reactants containing at least one active hydrogen atom by reaction with CO.sub.2 and alkaline phenates in an organic medium, characterized in that the reaction is conducted in the presence of simple or substituted alkaline phenates in at least an aprotic medium which is at least a partial solvent for the phenate, and selected from the class consisting of cyclic ethers, aliphatic, cycloaliphatic and heterocyclic tertiary amines, and cyclic sulphones, and at temperatures between about 40.degree. and 60.degree. C. The alkaline phenate is selected from the class consisting of the Li, Na, K salts of the phenols of the general formula: ##STR1## WHEREIN R is hydrogen or an alkyl or an alkoxy group, linear or branched, having up to 20 carbon atoms, or a phenyl group, n varies from 1 to 5, and M is the alkali metal. The starting organic substrate or reactant is selected from the class consisting of ketones, esters, nitroparaffins and nitriles.

Abstract: Polyurethanes such as polyol based polyurethanes are rendered flame resistant by incorporating therein 1-25 parts per hundred parts by weight of a mixture of halogenated phosphoric esters consisting essentially of at least two compounds of the formula: ##STR1## wherein R.sup.1 is a C.sub.1 -C.sub.3 alkyl or an R.sup.2 X group, R.sup.2 is a C.sub.2 -C.sub.3 alkylene group and R.sup.3 and R.sup.4 are independently selected from the group consisting of R.sup.2 X, wherein X is H, or a halogen; ##STR2## wherein R.sup.5 and R.sup.6 are independently selected from the group consisting of R.sup.1, R.sup.

Abstract: A process is disclosed for producing magnetite having an equiaxial morphology in the state of a hyperfine powder, starting from a solution of a bivalent iron solution, characterized in that:A. an aqueous suspension of Fe(OH).sub.2 is prepared by reacting an aqueous solution of a ferrous salt with alkali;B. said aqueous suspension of Fe(OH).sub.2 is fed into an autoclave into which is also introduced a quantity of air corresponding to 4-15 normal liters per 100 g of bivalent Fe; andC. the autoclave is then brought to a temperature between 150.degree. and 200.degree. C and maintained at this temperature until the inside pressure has stabilized itself at a constant level, thereby bringing about the formation of the desired magnetite which, once discharged from the autoclave, is washed and dried. The aqueous suspension of Fe(OH).sub.2 subjected to thermal decomposition in the autoclave may have present therein Cu.sup.+.sup.+ion, in a quantity between 0.3 and 1.4% by weight of the bivalent Fe. When Cu.sup.+.sup.

Abstract: An improved process for the continuous polymerization, in aqueous emulsion, of vinyl and/or vinylidene monomers is provided, the improvement comprising carrying out the polymerization in a series of reactors arranged in cascade and feeding the reaction mixture from the reactor at the lowest level to the reactor at the highest level.

Abstract: Polymers of styrene or copolymers thereof with monomers copolymerizable therewith are obtained in the form of expandable particles by polymerizing the styrene or mixture of monomers comprising styrene in the presence of an elastomeric olefinic copolymer or terpolymer, incorporating an expanding agent during or after the polymerization, ageing the preexpanded particles, and molding the pre-expanded and aged particles in a pressure-resistant mold which is not gas tight to obtain molded articles having very desirable characteristics.

Abstract: Disclosed are alkali and ammonium polyoxapolyfluoroalkanesulphonates having the formula:A-[CF.sub.2 O--(C.sub.2 F.sub.4 O).sub.m (CF.sub.2 O).sub.n --CF.sub.2 ]-Band the free acids thereof, in which the oxyperfluoroalkylene units --C.sub.2 F.sub.4 O--and --CF.sub.2 O-- are randomly distributed along the chain; m and n are integers the sum of which is a number from 2 to 50, and preferably from 4 to 20; the m/n ratio is between 0.2 and 1.5; A is a monovalent radical --CH.sub.2 O--R--SO.sub.3 M, wherein R is a divalent radical in alpha-gamma or alpha-delta position and is selected from the group consisting of alkylene, cycloalkylene, arylene and benzylene radicals, optionally containing, as substituents, chlorine atoms or alkylene or alkoxy groups; and M is an alkali metal, hydrogen or an ammonium group; and B is the same as A or is the radical --CH.sub.2 OH. These products are prepared by reacting .alpha.,.omega.-bis(hydroxymethyl)polyoxaperfluoroalkanes having the formulaHO-CH.sub.2 -[CF.sub.2 O-(C.sub.2 F.

Abstract: The present invention relates to new polyolefinic compositions suited for producing self-extinguishing articles.

Abstract: The present invention concerns a process for preparing of alkylene carbonates, and more particularly it relates to a process for the direct preparation of alkylene carbonates from olefines.More particularly, the present invention relates to a direct process for the preparation of alkylene carbonates, characterized in that an olefine selected from the group consisting of linear olefines and cyclic olefins having from 2 to 15 carbon atoms is reacted in a liquid phase with carbon dioxide in the presence of a gas selected from the group of oxygen and air and in the presence of a catalytic system consisting of:A. iodine in a form selected from the group consisting of elementary iodine, alkali metal iodides, alkaline earth metal iodides, iodides of a metal selected from the group consisting of groups IB, IIB, IIIA, IIIB, IVA, VA, VIIB, and VIII of the periodic table and iodohydrines of the olefine reactant, and ofB.

Abstract: Novel adducts of a carbamoyl sulphoxide and urea having the formula ##STR1## and adducts of the said carbamoyl sulphoxide and an organic compound having the grouping ##STR2## wherein R is substituted or unsubstituted aryl, alkyl or alkenyl; R.sub.1 and R.sub.2, which may be the same or different, are H, substituted or unsubstituted alkyls, alkenyls or aryls, or aliphatic groups that, bound to one another in the form of a chain --(CH.sub.2).sub.p --(X).sub.n --(CH.sub.2).sub.q -- (in which p = 1,2,3; q = 1,2,3; X is O, S, SO, SO.sub.2 ; n = O or 1), form with N a ring when n = 1 and (p+q) .ltoreq. 4, and y is O, S or N- are contemplated. The adducts have herbicidal properties and herbicide compositions containing the adducts as well as a process for inhibiting the growth of plants or for destroying them with a herbicide containing the adduct are also contemplated.

Abstract: Expandible particles of styrene polymers are prepared by a process in which the polymerization of styrene, or of mixtures of styrene and monomers copolymerizable with it, and/or treatment of the expandible particles prior to expansion thereof, are (is) carried out in the presence of dimers or trimers of unsaturated fatty acids or their esters with C.sub.1 -C.sub.18 alcohols.

Abstract: Polyolefinic fibers for use in the manufacture of synthetic paper are rendered readily water-dispersible by pre-treatment with a hydrophilic polymer which is a condensate of polyvinyl alcohol and aliphatic aldehydes containing from 1 to 6 carbon atoms, which condensates contain from 2 to 8 aldehyde residues per 100 units of polyvinyl alcohol.

Abstract: Crude graft products of styrene on polyolefinic rubbers in which, in the gel, the polystyrene/polyolefinic rubber ratio is shifted to relatively high polystyrene contents, always higher than 1:1, and which graft products are characterized by a satisfactory, which is to say commercially acceptable, distribution of the rubber particles in the polystyrene matrix are obtained by subjecting a solution of a polyolefinic rubber or elastomer in styrene to polymerizing conditions in aqueous phase in the presence of a radical initiator and of a chain transfer agent.

Abstract: Compounds consisting of a variously substituted unsaturated aliphatic chain and a terminal vinyl dichloro or trichloro substituted residue are disclosed, as well as a process for preparing them. The compounds are insecticides which exhibit an activity similar to that of the juvenile hormone and inhibit the development and metamorphosis of various insects.