THERMOPLASTIC-COATED AMMONIUM POLYPHOSPHATE AND PROCESS FOR THE PREPARATION THEREOF

摘要

Thermoplastic resin-coated ammonium polyphosphate comprises a core material which comprises ammonium polyphosphate and a thermosetting resin, a melamine monomer or a surface-treating agent; and a coating layer of a thermoplastic resin which covers the core material. The thermoplastic resin-coated ammonium polyphosphate is excellent in water resistance, resistance to acids, resistance to alkalis, resistance to ions and resistance to organic solvents and if it is incorporated into a resin composition as a component of a flame retardant used therein and the composition is formed into a molded article, the resulting article does not show any marked reduction of its mechanical strength.