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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Shore A	74	ASTM D2240
Tensile Strength at Break	21.2 MPa	ASTM D412
Elongation at Break	530 %	ASTM D412
100% Modulus	0.00283 GPa @Strain 100 %	ASTM D412
200% Modulus	0.00400 GPa @Strain 200 %	ASTM D412
300% Modulus	0.00570 GPa @Strain 300 %	ASTM D412
Resilience	68	[%], Bayshore; ASTM D2632
Tear Strength	110 pli	Split; ASTM D1938
	380 pli	Die C; ASTM D624
Taber Abrasion, mg/1000 Cycles	14 @Load 1.00 kg	H-18 wheel; ASTM D4060
Compression Set	19 % @Temperature 70.0 °C, Time 79200 sec	ASTM D395-B

Processing Properties	Original Value	Comments
Processing Temperature	45.0 - 60.0 °C	Baytec XL B
	65.0 °C	Desmodur ME-230
	70.0 °C	Baytec T20
Mold Temperature	80.0 °C
Pot Life	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

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PCOVEST0483 / 202266

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