Shaped polyester articles having good flame resistance and process for the production thereof
AssigneeRhone-Poulenc-Textile
InventorPaul Couchoud
Life of this patent
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Abstract
The present invention relates to shaped polyester articles which have good flame resistance. These articles comprise a polymethylene copolyester containing 60 to 95 mol % of terephthalate units and 5 to 40 mol % of isophthalate units and they contain 2 to 40% by weight of a phosphorus and/or halogen compound. They are employed in the textile industry and, in particular, in the furniture industry as well as in plastic films and materials for the building industry.
Claims7
Shaped articles of polyester of good resistance to flame comprising a polymethylene copolyester containing 60-95 mol % of terephthalate units and 5 to 40 mol % of isophthalate units and containing a fireproofing effective amount of 1,3-bis(diphenylphosphinoxide) 2,2 di(bromomethyl)propane or hydroquinone polyphenylphosphonate or monobromohydroquinone polyphenylphosphonate.
Process of obtaining polyester articles of good flame resistance, characterized by preparing a di- or tetramethylene terephthalate copolymer containing 5 to 40 mol % of isophthalate units and 60-95 mol % of terephthalate units of the same diol and incorporating with said polymer a fireproofing effective amount of 1,3-bis(diphenylphosphinoxide) 2,2 di(bromomethyl) propane or hydroquinone polyphenylphosphonate or monobromohydroquinone polyphenylphosphonate.
Dependencies are inferred from the claim text.