Covestro Desmodur® ME-230 + BaytecT20 + Baytec XL B, 74A Polyurethane, MDI-Ester

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Covestro Desmodur® ME-230 + BaytecT20 + Baytec XL B, 74A Polyurethane, MDI-Ester
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Characteristics: Properties: Good abrasion resistance Excellent hydrolysis resistance Low temperature performance High resilience Good microbial resistance Comments: Suitable for skate board and roller skate wheels Production of seals, gaskets & hydrocyclones Ideal for snow plow blades Information provided by Covestro
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Physical Properties	Metric	English	Comments

Specific Gravity	1.08 g/cc	1.08 g/cc	Desmodur ME-230
Viscosity	8.0 cP	8.0 cP	Baytec XL B
	80 cP	80 cP	Desmodur ME-230

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	74	74	ASTM D2240
Tensile Strength at Break	21.2 MPa	3070 psi	ASTM D412
Elongation at Break	530 %	530 %	ASTM D412
100% Modulus	2.83 MPa @Strain 100 %	410 psi @Strain 100 %	ASTM D412
200% Modulus	4.00 MPa @Strain 200 %	580 psi @Strain 200 %	ASTM D412
300% Modulus	5.70 MPa @Strain 300 %	827 psi @Strain 300 %	ASTM D412
Resilience	68	68	[%], Bayshore; ASTM D2632
Tear Strength	19.3 kN/m	110 pli	Split; ASTM D1938
	66.6 kN/m	380 pli	Die C; ASTM D624
Taber Abrasion, mg/1000 Cycles	14 @Load 1.00 kg	14 @Load 2.20 lb	H-18 wheel; ASTM D4060
Compression Set	19 % @Temperature 70.0 °C, Time 79200 sec	19 % @Temperature 158 °F, Time 22.0 hour	ASTM D395-B

Processing Properties	Metric	English	Comments
Processing Temperature	45.0 - 60.0 °C	113 - 140 °F	Baytec XL B
	65.0 °C	149 °F	Desmodur ME-230
	70.0 °C	158 °F	Baytec T20
Mold Temperature	80.0 °C	176 °F
Pot Life	6.00 - 7.00 min	6.00 - 7.00 min

Descriptive Properties
Appearance	liquid		Desmodur ME-230
	solid		Baytec T20
	solid		Baytec XL B
Content	0.025		Parts by weight of Dabco T-12 per 100 parts of Baytec XL B
	0.5-0.7		Parts by weight of Dabco 33LV per 100 parts of Baytec XL B
	100		Parts by weight of Desmodur ME-230 prepolymer
	1000 EW		NCO, Baytec T20
	12.5		Parts by weight of Baytec XL B
	22.7-23.3%		NCO, Desmodur ME-230
	237.5		Parts by weight of Baytec T20
	45 EW		NCO, Baytec XL B

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.

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PCOVEST0483 / 202266

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