New oligophosphorus compounds, useful as flame retardant in foamed or defoamed polymers, preferably polystyrene foam particles of expandable polystyrene or extruded polystyrene foam panels, which are useful for insulation of buildings

摘要

Oligophosphorus compounds (Q), are new. Oligophosphorus compounds (Q) of formula (P(R 1)(R 2)(=X)-P(R 3)-P(R 4)(R 5)) (Ia), (P(R 1)(R 2)-P(R 3)(=X)-P(R 4)(R 5)) (Ib) or (P(R 1)(R 2)(=X 1)-P(R 3)-P(R 4)(R 5)(=X 2)) (Ic), are new. R 1-R 51-16C-alkyl, 1-16C-alkenyl, 1-16C-alkoxy, 1-16C-alkenyloxy, 3-10C-cycloalkyl, 3-10C-cycloalkoxy, 6-10C-aryl , 6-10C-aryloxy, 6-10C-aryl-1-16C-alkyl, 6-10C-aryl-1-16C-alkoxy, NR 2R 3, COR 2, COOR 2or CONR 2R 3; and X 1, X 2O or S. An independent claim is included for the preparation of (Q).