A polyester composition having improved molding properties comprises 100 parts by weight of a polyester comprising mainly polyethylene terphthalate and 0.05 to 10 parts by weight of a specific type of polyamide or polyhydrazide as nucleating agent, which is uniformly dispersed in the polyester in a substantial size of 50 µm or less. The polyester composition is produced by dissolving or suspending the nucleat. ing agent and a dispersing aid in a solvent, co-precipitating the nucleating agent and the dispersing aid, and dispersing the precipite in the polyester. The composition is especially suitable for molding articles in metal molds.
一种具有更好成型性能的聚酯组合物包括 100 重量份主要由聚
对苯二甲酸乙二酯组成的聚酯和 0.05 至 10 重量份作为成核剂的特定类型的聚酰胺或聚酰
肼,它们以 50 微米或更小的粒度均匀地分散在聚酯中。将成核剂和分散助剂溶解或悬浮在溶剂中,使成核剂和分散助剂共同沉淀,然后将沉淀物分散在聚酯中,即可制成聚酯组合物。该组合物特别适用于在
金属模具中成型物品。