Covestro DESMODUR® MD1380 + BAYTEC® D21 + BAYTEC® XL B (Catalyst SD2-40) 70A Polyurethane, MDI-Ester

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Covestro DESMODUR® MD1380 + BAYTEC® D21 + BAYTEC® XL B (Catalyst SD2-40) 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 B
	1.13 g/cc	1.13 g/cc	BAYTEC® D21
	1.15 g/cc	1.15 g/cc	DESMODUR® MD1380
	1.21 g/cc	1.21 g/cc
Viscosity	30 cP	30 cP	BAYTEC® XL B
	1100 cP	1100 cP	BAYTEC® D21
	1200 cP	1200 cP	DESMODUR® MD1380

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	70	70	DIN 53505
	68 @Temperature 80.0 °C	68 @Temperature 176 °F	DIN 53505
	72 @Temperature -5.00 °C	72 @Temperature 23.0 °F	DIN 53505
Tensile Strength at Break	27.0 MPa	3920 psi	DIN 53504
Tensile Stress at Strain	0.800 MPa @Strain 10 %	116 psi @Strain 10 %	DIN 53504
Elongation at Break	500 %	500 %	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	53	53	[%]; DIN 53512
Tear Strength	25.9 kN/m	148 pli	with nick; ISO 34-1
	72.0 kN/m	411 pli	without nick; ISO 34-1
Abrasion	35	35	[mm3]; ISO 4649
Compression Set	23 % @Temperature 70.0 °C, Time 79200 sec	23 % @Temperature 158 °F, Time 22.0 hour	ISO 815-1

Processing Properties	Metric	English	Comments
Processing Temperature	45.0 °C	113 °F	BAYTEC® XL B
	60.0 °C	140 °F	BAYTEC® D21
	80.0 °C	176 °F	DESMODUR® MD1380
Mold Temperature	110 °C	230 °F
Pot Life	2.75 min	2.75 min

Descriptive Properties
Appearance	solid		DESMODUR® MD1380
	solid		BAYTEC® D21
	solid		BAYTEC® XL B
Content	0.15		SD2-40 % / total (by weight), (catalyst at the head)
	100		Parts by weight of prepolymer
	3.3		SD2-40 % / BAYTEC® XL B (by weight), to mix with BAYTEC® XL B
	45		Parts by weight of BAYTEC® D21
	6.7		Parts by weight of BAYTEC® XL B
	8.35-8.75%		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.

PCOVEST0403 / 202186

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