FLAME RETARDANT POLYMER COMPOSITION CONTAINING PHOSPHONIC ACID SALTS

摘要

Flame Retardant Polymer Composition Containing Phosponic Acid Salts The invention provides a composition comprising a halogen-free polymer and as flame retardant at least a metal or metalloid salt of a phosphonic acid of the general formula I: (I) in which R is a straight or branched chain alkyl group having 1 to 3 carbon atoms optionally substituted by one or more of halogen atoms or hydroxyl groups; and R' is hydrogen or an alkyl group having 1 to 3 carbon atoms, and wherein the metal or metalloid is selected from Groups IIA, IIB, IIIA, IVA and VA of the Period Chart of Elements.