Abstract: The invention relates to novel fusible zinc phosphinates of the formula (I) and/or polymers thereof 1

Abstract: The invention relates to mixtures of phosphonite (component A) and/or an ester and/or salt of a long-chain fatty acid (component B), and/or a carboxylic ester, and/or carboxylic amide (component C), and also to their use in polyamides or in polyesters.

Abstract: The invention relates to a flame retardant combination for thermoplastic polymers comprising, as component A, a phosphinate of the formula (I) and/or a diphosphinate of the formula (II) and/or polymers of these where R1 and R2 are identical or different and are C1-C6-alkyl, linear or branched, and/or aryl; R3 is C1-C10-alkylene, linear or branched, C6-C10-arylene, -alkylarylene or -arylalkylene; M are calcium ions, aluminum ions and/or zinc ions; m is 2 or 3; n is 1 or 3; x is 1 or 2, and, as component B, a synthetic inorganic compound and/or a mineral product.

Abstract: The present invention relates to a synergistic flame retardant combination for thermoplastic polymers which comprises as component A a salt of 1-hydroxydihydrophosphole oxides of the formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of the formula (II) and as component B a nitrogen compound of the formula (III) to (VIII) or a mixture of the compounds designated by the formulae in which the substituents are as defined in the description.

Abstract: The present invention relates to a synergistic flame retardant combination for thermoplastic polymers, preferably engineering plastics, especially for polyesters, which as component A comprises a phosphinic salt of the formula (I) defined in the description and/or a diphosphinic salt of the formula (II) and/or polymers thereof, and as component B comprises a nitrogen compound of the formula (III) to (VIII) defined in the description, or a mixture of the compounds represented by the formulae.

Abstract: The invention relates to a flame retardant combination for thermoplastic polymers comprising, as component A, a salt of 1-hydroxydihydrophosphole oxides of formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of formula (II), and, as component B, a synthetic inorganic compound and/or a mineral product.

Abstract: The invention relates to a process for the preparation of 1,1,1,2-tetrafluoroethane from 1,1,1-trifluoro-2-chloroethane and hydrogen fluoride in the gas phase, in which a catalyst containing chromium and magnesium is used which is obtainable by precipitating chromium(III) hydroxide by reacting 1 mol of a water-soluble chromium(III) salt with at least 1.5 mol of magnesium hydroxide or magnesium oxide in the presence of water, the reaction mixture is made into a paste containing chromium hydroxide and a magnesium salt, and the paste is then dried and treated with hydrogen fluoride at temperatures of 20 to 500° C.

Abstract: The invention relates to a novel flame retardant combination comprising, as component A, a phosphinate of the formula (I) and/or a diphosphinate of the formula (II) and/or polymers of these where R1 and R2 are identical or different and are C1-C6-alkyl, linear or branched, and/or aryl; R3 is C1-C10-alkylene, linear or branched, C6-C10-arylene, -alkylarylene or -arylalkylene; M is calcium ions, magnesium ions, aluminum ions and/or zinc ions, preferably aluminium or zinc; m is 2 or 3; n is 1 or 3; x is 1 or 2; and comprising, as component B, condensation products of melamine and/or reaction products of melamine with phosphoric acid and/or reaction products of condensation products of melamine with phosphoric acid and/or comprising a mixture of these. The invention also relates to the use of the abovementioned flame retardant combination, especially in thermoplastic polymers.

Abstract: Aluminum salts of alky-(1-alkoxyethyl)phosphinic acids are prepared by reacting alky-(1-alkoxyethyl)phospihnic acids with aluminum hydroxide in a molar ratio of 3:1. The resulting aluminum phosphinates are used as flame retardants in thermoplastics, particularly in polyesters.

Abstract: The present invention relates to a synergistic flameproofing combination for polymers, in particular for ABS, which contains, as component A, a phosphinic acid salt of the formulae (I) defined in the description and/or a diphosphinic acid salt of the formula (II) and/or polymers thereof and which contains, as component B, a nitrogen-containing phosphate or a mixture of the compounds defined by the formulae.

Abstract: Process for regenerating a fluorination catalyst The invention relates to a process for regenerating a fluorination catalyst containing chromium and magnesium after use in a fluorination reaction, in which the used catalyst is treated with a mixture comprising at least 10 mol % of HF, from 30 to 90 mol % of O.sub.2 and from 0 to 60 mol % of inert gas.

Abstract: A flame-retardant plastic molding composition of improved stability comprises50 to 85% by weight, based on the total amount of the molding composition, of an olefin polymer and15 to 50% by weight, based on the total amount of the molding composition, of a flameproofing system comprising 80 to 50% by weight of an ammonium polyphosphate of the formula (NH.sub.4 PO.sub.3).sub.n, in which n is a number from 200 to 1000 (=component A) and50 to 20% by weight of a reaction product of tris(2-hydroxyethyl) isocyanurate (THEIC) of the formula ##STR1## with an aromatic polycarboxylic acid of the formulaAr(COOH).sub.m(=component B).As a result of the flameproofing system to be employed according to the invention, not only is the processing temperature of the plastics molding composition increased, but the water-solubility of components of the molding composition after processing is reduced significantly.

Abstract: The invention relates to a process for the preparation of 1,1,1-trifluoro-2-chloroethane from trichloroethene and hydrogen fluoride in the gas phase. In this process a catalyst containing chromium and magnesium is used, which catalyst is obtainable by precipitating chromium(III) hydroxide by reacting 1 mole of a water-soluble chromium(III) salt with at least 1.5 mol of magnesium hydroxide or magnesium oxide in the presence of water, converting the reaction mixture into a paste containing chromium hydroxide and a magnesium salt and then drying the paste and treating it at temperatures of 20.degree. to 500.degree. C. with hydrogen fluoride.