Quadrant EPP Duratron® CU60 PBI, Polybenzimidazole, unfilled, compression molded

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Subcategory: Polybenzimidazole; Polymer; Thermoplastic

Close Analogs: Formerly PBI Performance Products Celazole® PBI.

Material Notes:
Duratron® PBI is the highest performance engineering plastic available from Quadrant EPP. It offers the highest mechanical properties of any thermoplastic above 400° F (205° C). Duratron® PBI is ideal for high heat bushings, connectors and valve seats. Duratron® PBI is extremely hard and can offer a challenge to fabricate. Fabrication instructions can be furnished by Quadrant EPP.

It offers the highest heat resistance and mechanical property retention over 400°F (205°C) of any unfilled plastic. It has better wear resistance and load carrying capabilities at extreme temperatures than any other reinforced or unreinforced advanced engineering plastic.

As an unreinforced material, Duratron® PBI is very "clean" in terms of ionic impurity and it does not outgas (except water). These characteristics make this material very attractive to semiconductor manufacturers for vacuum chamber applications. Duratron® PBI has excellent ultrasonic transparency which makes it an ideal choice for parts such as probe tip lenses in ultrasonic measuring equipment.

Duratron® PBI is also an excellent thermal insulator. Other plastics in melt do not stick to PBI. These characteristics make it ideal for contact seals and insulator bushings in plastic production and molding equipment.

Data provided by Quadrant Engineering Plastic Products from tests on stock shapes and parts produced by Quadrant EPP.

Physical Properties	Metric	English	Comments
Specific Gravity	1.3 g/cc	0.047 lb/in³	ASTM D792
Water Absorption	0.4 %	0.4 %	Immersion, 24hr; ASTM D570(2)
Water Absorption at Saturation	5 %	5 %	Immersion; ASTM D570(2)
Mechanical Properties
Hardness, Rockwell E	105	105	ASTM D785
Hardness, Rockwell M	125	125	ASTM D785
Hardness, Shore D	94	94	ASTM D2240
Tensile Strength, Ultimate	138 MPa	20000 psi	ASTM D638
Elongation at Break	3 %	3 %	ASTM D638
Tensile Modulus	5.86 GPa	850 ksi	ASTM D638
Flexural Modulus	6.55 GPa	950 ksi	ASTM D790
Flexural Yield Strength	221 MPa	32000 psi	ASTM D790
Compressive Strength	345 MPa	50000 psi	10% Def.; ASTM D695
Compressive Modulus	6.21 GPa	900 ksi	ASTM D695
Coefficient of Friction	0.24	0.24	Dry vs. Steel; QTM55007
K (wear) Factor	121 x 10-8 mm³/N-M	60 x 10-10 in³-min/ft-lb-hr	QTM 55010
Limiting Pressure Velocity	1.31 MPa-m/sec	37500 psi-ft/min	4:1 safety factor; QTM 55007
Izod Impact, Notched	0.267 J/cm	0.5 ft-lb/in	ASTM D256 Type A
Electrical Properties
Surface Resistivity per Square	Min 1e+013 ohm	Min 1e+013 ohm	EOS/ESD S11.11
Dielectric Constant	3.2	3.2	1MHz; ASTM D150
Dielectric Strength	21.7 kV/mm	550 V/mil	Short Term; ASTM D149
Dissipation Factor	0.003	0.003	1MHz; ASTM D150
Thermal Properties
CTE, linear 68°F	23.4 µm/m-°C	13 µin/in-°F	(-40°F to 300°F); ASTM E831
Thermal Conductivity	0.403 W/m-K	2.8 BTU-in/hr-ft²-°F	ASTM F433
Maximum Service Temperature, Air	316 °C	600 °F	Long Term
Deflection Temperature at 1.8 MPa (264 psi)	427 °C	800 °F	ASTM D648
Glass Temperature	399 °C	750 °F	ASTM D3418
Flammability, UL94 (Estimated Rating)	V-0	V-0	1/8 inch
Qualitative Processing Properties
Compliance - FDA	Not Compliant
Machinability	10	1-10, 1=Easier to Machine
Service in Alcohols	Acceptable
Service in Aliphatic Hydrocarbons	Acceptable
Service in Aromatic Hydrocarbons	Acceptable
Service in Chlorinated Solvents	Acceptable
Service in Ethers	Acceptable
Service in Ketones	Acceptable
Service in Strong Acids	Unacceptable
Service in Strong Alkalies	Unacceptable
Service in Sunlight	Limited
Service in Weak Acids	Limited
Service in Weak Alkalies	Limited

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistant format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to our disclaimer and terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into the Quadrant Engineering Plastics Products database.