Covestro DESMODUR®MD1578 + BAYTEC® D21 + BAYTEC® XL AL905 (Catalyst SD11-2) 70A Polyurethane, MDI-Ester

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Covestro DESMODUR®MD1578 + BAYTEC® D21 + BAYTEC® XL AL905 (Catalyst SD11-2) 70A Polyurethane, MDI-Ester
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.01 g/cc	1.01 g/cc	BAYTEC® XL AL905
	1.13 g/cc	1.13 g/cc	BAYTEC® D21
	1.14 g/cc	1.14 g/cc	DESMODUR® MD1578
	1.19 g/cc	1.19 g/cc
Viscosity	30 cP	30 cP	BAYTEC® XL AL905
	1100 cP	1100 cP	BAYTEC® D21
	1500 cP	1500 cP	DESMODUR® MD1578

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	70	70	DIN 53505
	64 @Temperature 80.0 °C	64 @Temperature 176 °F	DIN 53505
	73 @Temperature -5.00 °C	73 @Temperature 23.0 °F	DIN 53505
Tensile Strength at Break	47.0 MPa	6820 psi	DIN 53504
Tensile Stress at Strain	1.20 MPa @Strain 10 %	174 psi @Strain 10 %	DIN 53504
Elongation at Break	490 %	490 %	DIN 53504
100% Modulus	3.20 MPa @Strain 100 %	464 psi @Strain 100 %	DIN 53504
200% Modulus	4.50 MPa @Strain 200 %	653 psi @Strain 200 %	DIN 53504
300% Modulus	6.50 MPa @Strain 300 %	943 psi @Strain 300 %	DIN 53504
Resilience	63	63	[%]; DIN 53512
Tear Strength	30.0 kN/m	171 pli	with nick; ISO 34-1
	60.0 kN/m	342 pli	without nick; ISO 34-1
Abrasion	40	40	[mm3]; ISO 4649
Compression Set	20 % @Temperature 70.0 °C, Time 79200 sec	20 % @Temperature 158 °F, Time 22.0 hour	ISO 815-1

Processing Properties	Metric	English	Comments
Processing Temperature	45.0 °C	113 °F	BAYTEC® XL AL905
	60.0 °C	140 °F	BAYTEC® D21
	80.0 °C	176 °F	DESMODUR® MD1578
Mold Temperature	110 °C	230 °F
Pot Life	1.50 min	1.50 min

Descriptive Properties
Appearance	solid		DESMODUR® MD1578
	solid		BAYTEC® D21
	solid		BAYTEC® XL AL905
Content	0.3		SD11-2 % / total (by weight), (catalyst at the head)
	100		Parts by weight of prepolymer
	5.4		Parts by weight of BAYTEC® XL AL905
	62		Parts by weight of BAYTEC® D21
	7.6-8%		NCO

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 consistent 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 MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

PCOVEST0409 / 202192

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