Abstract: Baths for the chemical polishing of copper or copper alloy surfaces, comprising, in aqueous solution, hydrogen peroxide, chloride ions, phosphoric acid and phosphate and hydrogenphosphate ions, in quantities adjusted so as to impart a pH of between 1.25 and 3 to the bath.

Abstract: The invention relates to a process for the manufacture of a fluorinated hydrocarbon by the reaction of hydrogen fluoride with an unsaturated chlorinated hydrocarbon in the liquid phase in the presence of a catalyst constituted by a tin compound and of an additive constituted by an organophosphorus compound.

Abstract: Process for the manufacture of a mixed metal oxide powder, in which at least one metal alcoholate is hydrolyzed in the presence of at least one metal oxide or hydroxide and of an acidic organic compound containing more than 6 carbon atoms in the molecule. The process is applicable to the production of barium titanate powders.

Abstract: The vinylidene fluoride polymer layer is bonded to that of plasticized vinyl chloride polymer by means of a mixture of adhesives consisting of a copolymer of vinyl acetate and of ethylene and of a copolymer of vinyl chloride and of vinyl acetate, the said mixture containing from 36 to 95% by weight of vinyl acetate and exhibiting a dynamic viscosity equal to at least 55 kPa s at 100.degree. C. and 11 s.sup.-1.

Abstract: Use of a guanidine-related compound in solution phase peptide synthesis, the guanidine-related compound including a tetraphenylborate ion and having the general formula: ##STR1## wherein R denotes an organic radical including at least one amine group, and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 denote inorganic or organic groups independently of each other.

Abstract: Cleaning baths for the removal of a coating containing niobium on a substrate, consisting of an aqueous solution of hydrogen peroxide and of alkali metal hydroxide. The coating is treated with the bath, to remove it from the substrate by dissolving.

Abstract: Process for the preparation of an expandable vinyl plastisol capable of yielding cellular products containing a nitrogen-based blowing agent and a zinc salt as accelerator of decomposition of the blowing agent. The accelerator, which is preferably zinc chloride, is incorporated in the plastisol in the form of a solution in a liquid carrier.The process results in cellular products consisting of uniform fine cells without any major change in color.

Abstract: Process for the manufacture of a powder of mixed metal oxides by cohydrolysis of metal alcoholates in the presence of an acidic organic compound and mixed metal oxide powders in which the molar relationships R.sub.1 and R.sub.2 of a metal oxide to the sum of the metal oxides in the powder and in a particle of the powder are such that ##EQU1## The process applies to powders of zirconia doped with yttrium oxide.

Abstract: Use of a guanidine-related compound in solution phase peptide synthesis, the guanidine-related compound comprising a tetraphenylborate ion and having the general formula: ##STR1## wherein R denotes an organic radical comprising at least one amine group.

Abstract: The compositions contain a biosynthetic pesticide product, preferably originating from microorganisms of the genus Bacillus, in suspension in a liquid and at least one substance of general formula: ##STR1## in which R represents a hydrogen atom, a halogen atom, or a salt derived from this substance.The substance has a bacteriocidal or bacteriostatic action.The compositions are effective against insects.

Abstract: The subject of the invention is mainly an electrically conductive polymer containing repeated units derived from 3-alkythiophenes in which the alkyl substituent contains from six to nine carbon atoms.The invention also relates to a process for manufacturing these polymers and to electroconductive devices containing them.

Abstract: The invention relates to a process for the oxychlorination of ethylene by means of a catalyst composition comprising an alumina support impregnated with cupric chloride, magnesium chloride and a chloride of an alkali metal chosen from sodium and lithium. The oxychlorination performed in this manner makes it possible to obtain an excellent yield without the reactor being corroded by the catalyst composition employed.

Abstract: Composite sheet for the impervious coating of construction components which are covered with a water-repellent hydrocarbon material (for example, bitumen or expanded polystyrene), comprising at least two superposed layers based on flexible polyvinyl chloride, in which the surface of the layer intended to be placed on the hydrocarbon material is subjected to a cold plasma treatment.

Abstract: The seeds are coated by means of a polyester the melting temperature of which is low.The process consists in treating the seeds by means of a solution of the polyester in an organic solvent or by means of the polyester in the liquid or molten state.

Abstract: Stabilized 1,1,1-trichloroethane compositions containing an epoxide compound such as epoxybutane, a nitro compound such as nitromethane, a furan compound such as 2-methylfuran, and methyl acetate. These compositions are suitable for the degreasing of metals and for the dry cleaning of textiles in the presence of an aqueous phase.

Abstract: An aqueous sodium hypochlorite solution (3) is added, in a quantity which is deficient relative to that required to decompose the entire amount of calcium chloride, to an aqueous calcium chloride solution (2), the sodium chloride which precipitates (6) is separated and the remaining amount (9) of the sodium hypochlorite solution is then added to the resulting mother-liquor (7). Single FIGURE.

Abstract: The liquid phase dehydrochlorination of haloalkanes is performed with an initiator mainly comprising decachlorobutane and/or octachloro-1-butene.The process is applicable, in particular, to the production of chloroethylenes from the corresponding polychloroethanes.

Abstract: Process for the manufacture of a metal oxide powder for ceramic materials by the hydrolysis of a metal alcoholate in the presence of an acidic organic compound.The process applies to the production of metal oxide powders, such as zirconia powders, with a mean particle diameter of between 0.05 and 2 microns.

Abstract: Stabilized compositions based on alpha-olefin polymers stabilized against degradation by oxidizing liquids, based on polymers of alpha-olefins such as propylene, containing a phenolic antioxidant, a phosphonite and a sulphur-containing stabilizer chosen from the esters derived from aliphatic polyols and alkylthiodipropionic acids and from combinations of a metal sulfide with one of these esters or with an organic polysulfide and optionally also containing an organic phosphite and an anti-acid agent. These compositions exhibit outstanding resistance to the phenomenon of oxidative degradation produced particularly by the contact with hot washing products of all kinds.

Abstract: In a first stage, a heterocyclic oxygen compound is polymerized by an ionic route in a vinyl halide and, in a second stage, the vinyl halide, to which other unsaturated monomers capable of being polymerized by a radical route may be added if desired, is polymerized by a radical route in aqueous dispersion and in the presence of the polymerization mixture originating from the first stage.