Covestro Baydur® 40 Polyurethane

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Covestro Baydur® 40 Polyurethane (discontinued **)
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced
Material Notes:	Rigid integral skin polyurethane foam for lightweight moldings. Sandwich structure gives a high stiffness-to-weight ratio. Information provided by Bayer. As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.
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Physical Properties	Original Value	Comments

Density	0.400 g/cc
Water Absorption at Saturation	0.30 %
	0.30 %

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	11.0 MPa
Elongation at Break	6.0 %
Tensile Modulus	0.440 GPa
Charpy Impact Unnotched	0.900 J/cm²

Electrical Properties	Original Value	Comments
Electrical Resistivity	>= 1.00e+15 ohm-cm
Surface Resistance	2.00e+14 ohm
Dielectric Strength	18.0 kV/mm
Comparative Tracking Index	600 V

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	80.0 µm/m-°C @Temperature 20.0 °C
CTE, linear, Transverse to Flow	80.0 µm/m-°C @Temperature 20.0 °C

**
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PBA076 / 26686

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