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Grade: Udel® P 1700
Formula: PSu
Form: Granule
Material: Polysulfone (PSU)
CAS Number: 25135-51-7
Commodity: Polymers
Nominal Granule Size: 2mm
Color: Natural
Udel® P 1700 PSU (Polysulfone) granules are high-performance thermoplastics designed for medical, aerospace, and laboratory applications requiring superior thermal and chemical resistance. With a high glass transition temperature and hydrolysis resistance, these granules are ideal for precision-molded components exposed to high temperatures and repeated sterilization, such as surgical tools, biopharmaceutical filtration membranes, and analytical lab instruments. Their flame resistance and excellent dielectric properties make them indispensable in aerospace electronics, automotive electrical systems, and high-voltage insulation components. Additionally, their chemical stability enables the production of durable, contamination-resistant equipment for research laboratories and industrial processing environments.
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Material Properties for Polymers

Chemical Resistance
Element Value
Acids - concentrated Fair
Acids - dilute Good
Alcohols Good
Alkalis Good
Aromatic hydrocarbons Fair
Greases and Oils Good
Halogens Good
Ketones Poor
Electrical Properties
Element Value
Dielectric constant @1kHz 3.14
Dielectric constant @1MHz 3.1
Dissipation factor @ 1kHz 0.0013
Dissipation factor @ 1MHz 0.005
Dielectric strength( kV mm⁻¹ ) 17
Volume resistivity( Ohmcm ) 5x10¹⁶
Physical Properties
Element Value
Flammability HB
Radiation resistance Good
Resistance to Ultra-violet Poor
Limiting oxygen index( % ) 30
Water absorption( % ) 0.4
Water absorption - equilibrium( % ) 0.85
Density( gcm⁻³ ) 1.24
Mechanical Properties
Element Value
Hardness - Rockwell M91
Elongation at break( % ) 50-100
Tensile modulus( GPa ) 2.48
Izod impact strength( J m⁻¹ ) 69
Tensile strength( MPa ) 70
Thermal Properties
Element Value
Heat-deflection temperature - 1.8MPa( C ) 174
Upper working temperature( C ) 150-180
Thermal conductivity( W m⁻¹ K⁻¹ ) 0.26
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) 56

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