Aluminiumsalze von Alkyl-hydroxymethylphosphinsäuren

摘要

Aluminium salts of alkylhydroxymethylphosphinic acids are prepared by reacting phosphonic acids with aluminium hydroxide, paraformaldehyde, trioxane or mixtures of the same under pressure in water at 110 to 250 DEG C. The thus obtained aluminium phosphinates are incorporated into polymers, in particular polyesters, in which they have a fire-proofing effect.