Covestro Baydur® GS-772 Polyurethane Solid RIM, MDI-based 2-Component Liquid System

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Covestro Baydur® GS-772 Polyurethane Solid RIM, MDI-based 2-Component Liquid System (discontinued **)
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Solid RIM
Material Notes:	0.25 in. thickness. RIM = Reaction Injection Molding Information provided by Bayer Corporation, Polyurethanes Division 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	1.13 g/cc	ASTM D792
Linear Mold Shrinkage	0.010 - 0.012 cm/cm	Bayer Test

Mechanical Properties	Original Value	Comments
Hardness, Shore D	76	ASTM D2240
Tensile Strength, Ultimate	39.0 MPa	ASTM D638/D412
Elongation at Break	10 %	ASTM D638/D412
Flexural Yield Strength	60.0 MPa	ASTM D790
Flexural Modulus	1.40 GPa	ASTM D790
Compressive Yield Strength	35.0 MPa	ASTM D395
Izod Impact, Notched	0.500 J/cm	ASTM D256
Izod Impact, Unnotched	3.70 J/cm	ASTM D256

Electrical Properties	Original Value	Comments
Electrical Resistivity	2.30e+14 ohm-cm	ASTM D257
Surface Resistance	3.10e+15 ohm	ASTM D257
Dielectric Constant	3.44 @Frequency 1e+6 Hz	ASTM D150
Dielectric Strength	11.5 kV/mm	ASTM D149

Thermal Properties	Original Value	Comments
CTE, linear	101 µm/m-°C @Temperature 20.0 °C	ASTM D696
Deflection Temperature at 0.46 MPa (66 psi)	99.0 °C	ASTM D648
Flammability, UL94	V-0 @Thickness 6.35 mm
	V-0 @Thickness 6.35 mm

**
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PB2B09 / 26584

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