Thermoplastic resin-coated ammonium polyphosphate and process for the preparation thereof
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United States of America Patent
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Sep 18, 2001
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N/A
app pub date -
Feb 26, 1999
filing date -
Jun 26, 1997
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Expired
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Abstract
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.
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