Covestro DESMODUR® TD643 + MOCA, 90 A Polyurethane, TDI- Ester

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Covestro DESMODUR® TD643 + MOCA, 90 A Polyurethane, TDI- Ester
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.19 g/cc	1.19 g/cc	DESMODUR® TD643
	1.25 g/cc	1.25 g/cc	MOCA
	1.26 g/cc	1.26 g/cc
Viscosity	2000 cP	2000 cP	DESMODUR® TD643

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	90	90	DIN 53505
	87 @Temperature 80.0 °C	87 @Temperature 176 °F	DIN 53505
	95 @Temperature -5.00 °C	95 @Temperature 23.0 °F	DIN 53505
Tensile Strength at Break	49.0 MPa	7110 psi	DIN 53504
Tensile Stress at Strain	3.40 MPa @Strain 10 %	493 psi @Strain 10 %	DIN 53504
Elongation at Break	510 %	510 %	DIN 53504
100% Modulus	6.00 MPa @Strain 100 %	870 psi @Strain 100 %	DIN 53504
200% Modulus	8.10 MPa @Strain 200 %	1170 psi @Strain 200 %	DIN 53504
300% Modulus	12.1 MPa @Strain 300 %	1750 psi @Strain 300 %	DIN 53504
Resilience	29	29	[%]; DIN 53512
Tear Strength	50.0 kN/m	285 pli	with nick; ISO 34-1
	114 kN/m	650 pli	without nick; ISO 34-1
Abrasion	35	35	[mm3]; ISO 4649
Compression Set	25 % @Temperature 70.0 °C, Time 79200 sec	25 % @Temperature 158 °F, Time 22.0 hour	ISO 815-1

Processing Properties	Metric	English	Comments
Processing Temperature	80.0 °C	176 °F	DESMODUR® TD643
	120 °C	248 °F	MOCA
Mold Temperature	110 °C	230 °F
Pot Life	5.00 min	5.00 min

Descriptive Properties
Appearance	solid		DESMODUR® TD643
	solid		MOCA
Content	100		Parts by weight of prepolymer
	13		Parts by weight of MOCA
	4.1-4.5%		NCO, DESMODUR® TD643

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PCOVEST0576 / 202359

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