NON-HALOGENATED FLAME RETARDANT UNSATURATED POLYESTER RESINS/COMPOSITES CONTAINING METAL PHOSPHONATE
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United States of America Patent
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Issued Date -
May 11, 2017
app pub date -
Aug 3, 2016
filing date -
Sep 1, 2015
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Abstract
Halogen-free flame retarded unsaturated polyester (UPE) composites are described, where aluminum methyl methylphosphonate (AMMP) was added to a UPE matrix in order to obtain a UL94-V0 formulation. The combustion properties of AMMP are improved to that of aluminum trihydrates (ATH) in cone calorimetry. The use of AMMP prepared with phosphonium catalyst was also shown to be advantageous for retaining the gelation time of the UPE resins in a mold.
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