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Plastics & Elastomers
The material selection platform
Plastics & Elastomers
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Ultradur® B 6550

Technical Datasheet | Supplied by BASF
Ultradur® B 6550 is an unreinforced, high viscosity, semi-crystalline, saturated, thermoplastic polyester derived from polybutylene terephthalate (PBT). Exhibits toughness, high rigidity & strength, good dimensional stability under heat, good impact resistance, very high resistance to wear, thermostability, sliding friction properties, good insulation properties, good impact strength, low water absorption, good resistance to chemicals & weathering, and excellent heat ageing behavior. Can be processed using extrusion. Recommended for the production of semi-finished products, profile and hollow rods. It complies with the EU Directive 2006/122/EC (PFOA), EU Directive 2011/65/EU (RoHS) and EC Regulation 1907/2006 (REACH).
Product Type
Polyester > PBT
Product Status

Ultradur® B 6550 Properties

Electrical Properties

Value & Unit
Test Condition
Test Method
Relative Permittivity
(100 Hz)
IEC 60250
Surface Resistivity
1E13 ohm
IEC 60093
Dissipation Factor
10 x 10-4
(At 100 Hz, 23°C)
IEC 60250

Ultradur® B 6550 Processing Guidelines

Injection Molding Properties

Value & Unit
Test Condition
Test Method
Suggested Max Moisture
0.04 %
Drying Temperature
80 - 120 °C
Mold shrinkage (parallel)
1.70 %
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