Polyester filaments flame retarded with end-capped poly(m-phenylene cyclohexylphosphonate)

摘要

Polyester filaments having improved flame retardant properties are prepared by a process in which a poly(m-phenylene cyclohexylphosphonate) compound is melted, is mixed with molten polyester, and the melt blend is forwarded to a spinning pack and is melt-spun into filaments. The compound is end-capped with p-phenylphenol or p-bromophenol to avoid reaction with the molten polyester.