What is BASF PBT Resin B 4500

Against the backdrop of the rapid development of plastic molding technology, the market's demand for precision, stability and processing flexibility is increasing day by day. The PBT B 4500 launched by BASF is precisely the ideal material to deal with these challenges. This is a medium-viscosity polybutylene terephthalate (PBT) resin specially designed for extrusion processes. It features excellent formability and electrical performance, and is widely used in applications such as pipes, cast films, and structural profiles.

01 | Highlights of PBT B 4500: A reliable player in niche processes

Optimised viscosity design for flow and moulding

PBT B 4500 is a medium-viscosity grade with a melt index of about 21 cm³/10min (250°C/2.16kg), which provides good moulding flow while meeting the requirements for extrusion stability. It is suitable for a wide range of equipment and moulds, and can support high-speed extrusion production.

Outstanding dimensional stability

Maintains low shrinkage (1.6% in the flow direction and 1.9% in the vertical direction) in hot and humid environments, providing better dimensional accuracy for thin-walled products and long structural parts.

Coexistence of heat resistance and electrical insulation

The heat deflection temperature is as high as 165°C (0.45 MPa), while maintaining a dielectric strength of 36 kV/mm and a resistivity of 10¹⁵Ω-cm, making it suitable for use in electronic and industrial parts that require heat resistance and electrical insulation.

02 | Performance Balance for diverse processing Demands

The development focus of PBT B 4500 is not only on the optimization of thermal and electrical performance, but also on the adaptability to take into account multiple processing methods. Whether it is continuous extrusion of pipes or complex die forming for casting or profiled materials, it can demonstrate excellent melt stability and low precipitation, helping users reduce the defective rate of finished products.

In addition, its HB-level flame retardant performance, combined with a relatively low volatile content, makes it suitable for the manufacturing of components such as consumer electronics structural parts, office equipment guide rails, cable protection pipes, and automotive ventilation ducts.

03 | Application Scenario Expansion: Beyond Structural Support

PBT B 4500 is not merely a structural material. With its impact resistance (notched impact at 23°C NB), good surface finish and electrical performance, it demonstrates unique value in the following fields:

Electronics/electrical industry: Conduits, cable trays, insulating thin sheets, etc. used in low-voltage environments;

Automobile manufacturing: Suitable for non-load but high-demand parts such as ventilation ducts and cable sheaths;

Consumer goods manufacturing: Basic materials for precision components such as printer guides, copier sliders, and curtain grooves;

Environmentally friendly extruded profiles: Used in combination with recycled materials, they contribute to the development of a circular economy in the plastic industry.

04 | Overview of Typical Property Parameters for PBT B 4500 Resins

05 | Forward-looking Trends: Extending towards Greater Efficiency and Greenness

As the focus on low-VOC, sustainable and recyclable plastic solutions intensifies, BASF is promoting the PBT platform to develop in a more environmentally friendly and intelligent direction. In the future, materials like B 4500 will make efforts in the following aspects:

Low odor and low emission grade improvement: Meeting the new standards for automotive and indoor electronic devices;

Improved recycling compatibility: Optimized blending performance, supporting co-extrusion or blending with recycled materials;

High surface quality level development: For the field of structural shells that do not require spraying;

Digital material parameter management: Facilitates users' precise simulation of the extrusion process and enhances the first-time pass rate.

06 | Conclusion: PBT B 4500, the possibility of driving precision forming with materials

If you are looking for a PBT resin that combines process friendliness, electrical performance and structural strength, BASF B 4500 is a choice worth paying attention to. It not only supports efficient extrusion, but also provides reliable guarantees in terms of electrical safety and dimensional stability, helping manufacturers achieve high-quality production of complex products.

For complete physical property data sheets, sample support or process suggestions, please feel free to contact our technical support team.

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