AGENTS RETARDANT LA COMBUSTION

• Main Author: WILLIAM ALBERT LARKIN ET IRVING TOUVAL
• Format: Patent
• Language: French
• Published: 13.10.1978
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

L'invention a pour objet un agent retardant la combustion pour polymères organiques synthetiques, caractérisé en ce qu'il comprend du sulfure de zinc et une quantité d'une source organique d'halogène équivalente à 2 à 10 moles d'halogène par mole de sulfure de zinc, ladite source d'halogène etant choisie parmi les hydrocarbures halogénés et les esters halogénés des acides phosphoriques et phosphoreux, ledit halogene étant le chlore ou le brome. This invention provides a halogen-containing, flame retardant polymer wherein the halogen is chlorine or bromine, said composition 1) comprising a polymer selected from the group consisting of: (a) polymers wherein 50 to 100% of the repeating units are derived from a halogen-containing compound selected from the group consisting of ethylenically unsaturated compounds and saturated halogen-containing compounds, which, in turn, are selected from the group consisting of dicarboxylic acids containing from 4 to 20 carbon atoms and diols containing from 2 to 20 carbon atoms, (b) polymers that do not contain halogen in which the repeating units are derived from at least one ethylenically unsaturated compound, and (c) condensation polymers which they do not contain halogens selected from the group consisting of polyesters, polyamides, polycarbonates, epoxy polymers and non-cellular polyurethanes, in which any polymer ro that does not contain halogen is present in combination with an amount of an organic compound containing halogen equivalent to 7 to 40% chlorine or 3 to 20% bromine, based on the weight of the polymer, and 2) 0.3 to 50%, based on the weight of said polymer, of zinc sulphide. Optionally, a basic compound such as magnesium hydroxide or barium sulfate is included in the composition to neutralize any acid by-products formed during the pyrolysis of the polymer composition. (Machine-translation by Google Translate, not legally binding)