4,4'-BIS(PHTHALIMIDO)DIPHENYL SULFONE COMPOUNDS, PROCESSES FOR THEIR PRODUCTION AND FLAME RETARDANT POLYMER COMPOSITIONS CONTAINING THEM

摘要

A 4,4'-bis(phthalimido)diphenyl sulfone compound having the formula: <IMG> (I) wherein X is a halogen atom, k = 0 to 4, ? = 0 to 4, m = 0 to 4 and n = 0 to 4, provided k+?+m+n>1. (I) was prepared by reacting a phtalic anhydride of the formula: <IMG> (2) with a 4,4'-diaminodiphenyl sulfone of the formula: <IMG> (3) (I) are useful as flame retardants for polymers having high melting points, and such polymers comprising (I) accomplish excellent weather resistance and heat resistance.