Properties

Outstanding Performance in Critical Environments

Udel® PSU resins are amorphous sulfone polymers and offer many desirable characteristics, such as resistance to hydrolysis, thermal stability, retention of mechanical properties at elevated temperatures, clarity, and transparency.

Udel® PSU is indicated when higher thermal capability, inherent flame resistance, better chemical resistance, and improved mechanical properties are required.

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Heat Resistance

Sulfone polymers are noted for high heat deflection temperatures (HDT) and outstanding dimensional stability. These strong, rigid polymers are the only thermoplastics that remain transparent at service temperatures as high as 204°C (400°F). Even after long-term exposure, the resins do not discolor or degrade.

Hydrolytic Stability

The hydrolytic stability of sulfone polymers makes them highly resistant to water absorption. This combines with heat resistance to deliver reliable long-term performance in hot water and steam, even under autoclave pressures. Unlike other transparent polymers, sulfone polymers are not prone to clouding or crazing.