Performance Polymers
Performance Polymers

Ultradur® – The polybutylene terephthalate (PBT) for high-quality components

Polybutylene Terephthalate (PBT)

Ultradur® is BASF’s brand name for its line of partially crystalline, thermoplastic, saturated polyesters derived from polybutylene terephthalate (PBT). They are employed as materials for high-quality technical components in many industry sectors.

Ultradur® shows its strengths wherever high-quality and above all heavy-duty parts are required – for example in the automotive industry, in the electrics and electronic sectors. The range of applications which benefit from these properties of Ultradur® in both industry and everyday life is vast. A feature that is particularly important is the low water absorption and thus the fact that the mechanical and electrical properties are largely independent of the moisture content or the climatic surrounding conditions. Particularly for components that are safety-relevant and have to work reliably for the entire lifetime of a component, Ultradur® is indispensable.


Key advantages of Ultradur®

  • High rigidity and strength
  • Very good dimensional stability under heat
  • Low water absorption
  • Good resistance to many chemicals
  • Exceptional resistance to weathering
  • Excellent heat aging behavior

Ultradur® product range (PBT, PBT+ASA, PBT+PET)

The most important applications of Ultradur® are automotive engineering, electrical engineering, electronics and telecommunications as well as precision engineering and general mechanical engineering. For these applications, a variety of Ultradur® types is available.

Properties of Ultradur®

Ultradur<sup>®</sup> coffee capsules

The Ultradur® grades are polyalkylene terephthalate molding compounds based on polybutylene terephthalate. Ultradur® is produced by polycondensation of terephthalic acid or dimethyl terephthalate with 1,4-butanediol using special catalysts. Terephthalic acid, dimethyl terephthalate and 1,4-butanediol are obtained from petrochemical feedstocks, such as xylene and acetylene.

The processing of Ultradur®

Ultradur® can be processed by all methods known for thermoplastics. The main methods, however, are injection molding and extrusion. Complex moldings are economically manufactured in large numbers from Ultradur® by injection molding. The extrusion process is used to produce film, semi-finished products, pipes, profiled parts, sheet and monofilaments. Semi-finished products are for the most part machined further by means of cutting tools to form finished moldings.

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More Information

All information in one place: From technical articles, case studies and brochures, to data sheets and certificates.

Ultradur® application range

The applications are as manifold as its product properties: Explore the various application possibilities of Ultradur®!

Successful customer projects

Proven in practice: These case studies demonstrate the successful use of Ultradur® in customer projects.

Our service package

We offer our customers a comprehensive range of services with leading technologies and products. Find the service that matches your needs!

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In addition to Ultradur® we offer further innovative materials. These might also be interesting for you.