Covestro Baytec® MS-051 Polyurethane

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Covestro Baytec® MS-051 Polyurethane
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Characterization: Baytec MS-051 is a modified diphenylmethane diisocyanate (MDI)-terminated polyester prepolymer. Properties / Applications: Baytec MS-051 is a modified diphenylmethane diisocyanate (MDI)-terminated polyester prepolymer used in the manufacture of high-property solid cast polyurethane elastomers. The excellent resilience and low compression-set properties have enabled this material to be used for low-durometer wheels, printing rolls, and squeegee blades. As with any product, use of Baytec MS-051 prepolymer in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability. Information provided by Covestro
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Physical Properties	Original Value	Comments

Specific Gravity	1.17 g/cc @Temperature 100 °C
	1.18 g/cc @Temperature 80.0 °C
Viscosity	700 cP @Temperature 100 °C
	2700 cP @Temperature 80.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	80	BDO; ASTM D2240
	93	HQEE; ASTM D2240
Tensile Strength at Break	26.3 MPa	HQEE; ASTM D412
	37.0 MPa	BDO; ASTM D412
	4.41 MPa @Thickness 2540 mm	BDO; ASTM D412
	6.00 MPa @Thickness 5080 mm	BDO; ASTM D412
	8.07 MPa @Thickness 2540 mm	HQEE; ASTM D412
	8.14 MPa @Thickness 7620 mm	BDO; ASTM D412
	9.89 MPa @Thickness 5080 mm	HQEE; ASTM D412
	11.8 MPa @Thickness 7620 mm	HQEE; ASTM D412
Elongation at Break	525 %	BDO; ASTM D412
	650 %	HQEE; ASTM D412
Compressive Strength	0.241 MPa @Strain 2 %	BDO; ASTM D575
	0.621 MPa @Strain 2 %	HQEE; ASTM D575
	0.724 MPa @Strain 5.0 %	BDO; ASTM D575
	1.52 MPa @Strain 10 %	BDO; ASTM D575
	1.69 MPa @Strain 5.0 %	HQEE; ASTM D575
	2.28 MPa @Strain 15 %	BDO; ASTM D575
	2.90 MPa @Strain 10 %	HQEE; ASTM D575
	3.07 MPa @Strain 20 %	BDO; ASTM D575
	3.93 MPa @Strain 25 %	BDO; ASTM D575
	3.96 MPa @Strain 15 %	HQEE; ASTM D575
	5.03 MPa @Strain 20 %	HQEE; ASTM D575
	6.21 MPa @Strain 25 %	HQEE; ASTM D575
	10.9 MPa @Strain 50 %	BDO; ASTM D575
	18.4 MPa @Strain 50 %	HQEE; ASTM D575
Resilience	52	Bayshore, BDO; ASTM D2632
	54	Bayshore, HQEE; ASTM D2632
Tear Strength	105 pli	Split, BDO; ASTM D1938
	280 pli	Split, HQEE; ASTM D1938
	380 pli	Die C, BDO; ASTM D624
	615 pli	Die C, HQEE; ASTM D624
Taber Abrasion, mg/1000 Cycles	16 @Load 1.00 kg	H-18, BDO; ASTM D4060
	34 @Load 1.00 kg	H-18, HQEE; ASTM D4060
Compression Set	19 % @Temperature 70.0 °C, Time 79200 sec	HQEE; ASTM D395-B
	24 % @Temperature 70.0 °C, Time 79200 sec	BDO; ASTM D395-B

Thermal Properties	Original Value	Comments
Flash Point	>= 93.0 °C

Processing Properties	Original Value	Comments
Mold Temperature	100 - 110 °C

Descriptive Properties
Appearance	Light amber liquid
Content	4.9-5.2%	NCO

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PCOVEST0253 / 202036

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