This invention concerns thermoplastic polyester molding compositions containing iron oxides, particularly Fe.sub.2 O.sub.3 which compositions exhibit markedly reduced heat up times and are especially useful in molding operations such as blow molding of beverage bottles. The polyester polymer may have incorporated therein by copolymerization certain anthraquinone dyes having functional groups which condense during polymerization into the polyester chain. The dye moieties are thermally stable at the polymer processing temperatures and are colorfast and non-extractable from the polymer.
本发明涉及热塑性聚酯模塑组合物,其中包含
铁氧化物,特别是Fe.sub.2 O.sub.3,这些组合物表现出明显降低的加热时间,并且在模塑操作中特别有用,例如吹塑饮料瓶。聚酯聚合物可以通过共聚合反应将某些
蒽醌染料含有的官能团引入聚酯链中。
染料基团在聚合物加工温度下具有热稳定性,并且色牢度好,不会从聚合物中溶出。