Flame retardant composition for flammable plastic materials comprising 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine and process for producing the same

摘要

A flame retardant composition for flammable plastic materials and a method for producing the same are disclosed. The flame retardant composition comprises 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine that contains 1 to 1000 ppm of a metal species of a water-insoluble polyvalent metal compound selected from the group consisting of oxide, hydroxide, carbonate, phosphate, sulfate and silicate present in the particles of 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine. The flame retardant composition is produced by reacting an alkali metal salt of 2,4,6-tribromophenol and cyanuric chloride in the presence of said water-insoluble polyvalent metal compound.

主权项

1. A flame retardant composition for flammable plastic materials consisting essentially of
particulate 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine containing 1 to 1000 ppm of a metal species of a water-insoluble polyvalent metal compound having a solubility in water of less than 1 g/L at 25° C., wherein said water-insoluble polyvalent metal compound is antimony trioxide, and said water-insoluble polyvalent metal compound is being present in said particulate 2,4,6-tris(2,4,6-tribromophenoxy)-1,3,5-triazine in a physically indiscrete form, wherein said composition is prepared by reacting an alkali metal salt of 2,4,6-tribromophenol and cyanuric chloride in the presence of 0.01 to 10% by weight of finely divided particles of a water-insoluble polyvalent metal compound, based on the weight of cyanuric chloride, and wherein said composition contains at least one halide ion source and the content of halide ion sources calculated as NaCl in said composition is less than 500 ppm when determined by the potentiometric titration with AgNO3.