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Long life under demanding conditions. The main feature of the Ultradur product range with the suffix HR (=hydrolysis resistant) is the extremely high resistance of the PBT polymer (PBT=polybutylene terephthalate) to damage due to water at elevated temperatures. Contact with water in polyesters, even in the form of atmospheric humidity, leads

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.

Polybutylene terephthalate, otherwise known as PBT plastic is a semi crystalline thermoplastic within the polyester family of polymers. Like other polyesters, PBT polymer is particularly suited for applications in the food industry because of its excellent resistance to chlorine and caustic cleaning solutions.

Polybutylene Terephthalate (PBT) is a semi-crystalline engineering thermoplastic material. It has similar properties and composition to polyethylene terephthalate (PET). It is a member of the polyester family of polymers. PBT has gained commercial interest due to its wide range of applications.

It is almost colorless and odorless oily liquid. It is very slightly soluble in water but soluble in alcohols, hexane etc. while miscible and compatible with all the monomeric plasticizers used in PVC compounding. Melting point: 43°C (45°F; 230 K) Boiling point: 244-252°C at 0.7 kPa.