Patent ID: 6087423
Filing Date: 2000-07-11
Classification: C07F,C08K

Abstract:
A method for improving the flame retardancy of a polymer, the method comprising incorporating into the polymer an aluminum salt comprising a reaction product of a phosphorous compound with an aluminum compound, the phosphorous compound comprising at least one of 1-hydroxydihydrophosphole oxide and 1-hydroxyphospholane oxide, the aluminum compound comprising aluminum carbonate, aluminum hydroxide or aluminum oxide, wherein the phosphorous compound to the aluminum compound are reacted in at least a 3:1 molar ratio, each aluminum valence being occupied by the phosphorous compound, and wherein the aluminum salt has at least one of the formulas (Ia'), (Ib') and (II'): ##STR2## where R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are, independently of each other, hydrogen or a straight-chain or branched alkyl group.