Poly Benz Imidazole - Celazole®

CELAZOLE® (POLYBENZIMIDAZOLE)

Originally developed as a high temperature adhesive due to its anaerobic qualities however, in solid format, it is air that impedes its high temperature performance above 500°C as it then rapidly decomposes.

CELAZOLE® PBI closes the gap between plastics and ceramics and is ideally suited to harsh environments as it offers strength and inertness approaching ceramic, with toughness and resistance to fatigue of a high performance plastic material.

PBI can be characterised by the following properties:

• Highest heat deflection temperature of any plastic at 425°C
• Continuous service temperature of 400°C in inert environments
• Continuous service temperature in air of 345°C
• Short term exposure temperature of 540°C
• Lowest coefficient of linear thermal expansion of any unfilled plastic
• Highest compressive strength of all unfilled plastics
• Broad chemical resistance
• Excellent ultrasonic transparency
• Excellent high temperature electrical insulation
• Excellent thermal insulator

Fields of application: insulator bushings, electrical connectors, ball valve seats, gas plasma clamp rings, and piston rings.

For further information regarding PBI please contact the Manager Product Technology located at Tullamarine Head Office