Reactive flame retardant additives containing phosphino oxide moieties

摘要

Phosphino oxide group containing compounds useful as flame retardant additives, having the general formula (I): <IMAGE> (I) wherein: X and X1 represent a hydrogen atom or, when taken jointly, they represent an NR1 moiety in which R1 stands for a hydrogen atom; a linear or branched aliphatic C1-C5 moiety; a linear or branched C2-C6 acyl moiety; a phenyl moiety; R represents a cyclic or polycyclic C4-C9 moiety containing two carboxy groups, possibly esterified with univalent alcohols or glycols, or transformed into anhydrides, or two hydroxy groups.