Celanese Polymer Blends for Automotive Exterior Applications

The properties and commercial applications are described for a series of polymer blends based on Polybutylene Terephthalate (PBT). These blends are characterized by a unique balance of properties including super impact at a modulus characteristic of PBT, resistance to automotive chemicals, and ability to withstand temperatures required in automotive paint systems. The materials are tradenamed Duraloy(TM)*; the 2000 series of Duraloy(TM) is based on PBT. The mechanical and thermal properties of this series and the relationship of the properties to use in automotive body applications are discussed.