4,4 ' - bis (phthalimide) diphenylsulfone derivative blendinging fire-resistant high-molecular constituent

摘要

PURPOSE:To obtain a flame-retarding polymer composition free of evaporation loss of flame retardant during processing and excellent in light and heat resistance by mixing a polymer with a specified halogen compound. CONSTITUTION:A flame-retarding polymer composition is produced by mixing a polymer with a 4,4'-bis(phthalimido)diphenyl sulfone derivative of the formula (wherein X is Br or Cl; k, l, m and n are each 0-4, and k+l+m+n1) [e.g., 4,4'-bis(dibromophthalimido)diphenyl sulfone] as a flame retardant. The above polymer composition is freed of evaporation loss of flame retardant during processing and excels in light and heat resistance and also in whiteness as compared with the conventional imide compound. The above flame retardant can be obtained by reacting a halogenated phthalic anhydride with a halogenated 4,4'-diaminodiphenyl sulfone.