Ultradur B4406 BASF Corporation PBT Injection molding grade with migration-free flame retardant; for parts requiring enhanced fire resistance (eg plug-and-socket connectors, housings).

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。