Covestro Desmopan® 790 Polyurethane

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Covestro Desmopan® 790 Polyurethane
Categories:	Polymer; Thermoplastic; Polyurethane, TP
Material Notes:	Extrusion- and injection molding grade; high mechanical strength; Application; Toothed belts; Profiles; Injection molded engineering parts 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	1.21 g/cc	ISO 1183

Mechanical Properties	Original Value	Comments
Hardness, Shore A	92	ISO 868
Hardness, Shore D	40	ISO 868
Tensile Strength, Ultimate	48.0 MPa	200 mm/min; DIN 53504
Tensile Stress at Strain	3.40 MPa @Strain 10 %	200 mm/min; DIN 53504
	8.50 MPa @Strain 50 %	200 mm/min; DIN 53504
	11.7 MPa @Strain 100 %	200 mm/min; DIN 53504
	32.2 MPa @Strain 300 %	200 mm/min; DIN 53504
Elongation at Break	434 %	200 mm/min; DIN 53504
Tensile Modulus	0.0530 GPa @Temperature 60.0 °C	storage; ISO 6721-1,-4
	0.100 GPa @Temperature 20.0 °C	storage; ISO 6721-1,-4
	0.630 GPa @Temperature -20.0 °C	storage; ISO 6721-1,-4
Rebound	32 %	Resilience; ISO 4662
Tear Strength	85.0 kN/m	500 mm/min; ISO 34-1
Abrasion	30	mm³, Method A; ISO 4649
Compression Set	25 % @Temperature 23.0 °C	72 hr; ISO 815
	42 % @Temperature 70.0 °C	24 hr; ISO 815
	34 % @Temperature 70.0 °C, Time 86400 sec	Method C; ISO 815-1

Processing Properties	Original Value	Comments
Melt Temperature	200 - 220 °C	Extrusion
	210 - 230 °C	Injection
Mold Temperature	20.0 - 40.0 °C	Injection
Drying Temperature	80.0 °C

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PB09769 / 92609

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