Ultradur S4090G2 BASF Corporation PBT+ASA is a 20% glass reinforced, pigmented black PBT+ASA blend. It produces moldings with good surface finish,

聚对苯二甲酸丁二醇酯，又名聚对苯二甲酸四次甲基酯。与PET一起统称为热塑性聚酯。用于电子电气，汽车和机械设备等。