Flame retardant polyethylene terephthalate

摘要

If antimony oxide is added to a blend of polyethylene terephthalate/alkali metal organic carboxylate in the form of a concentrate in a polyamide, the destabilizing effect of the antimony oxide on the blend is minimized. This greatly improves the thermal stability of the polyethylene terephthalate blend during compounding and subsequent melt processing operations, as compared with similar compositions where the antimony oxide is added in the form of a concentrate with another organic polymer, viz., polyethylene, or is added neat.