Covestro Bayflex® XGT-16 Polyurethane Elastomeric RIM, MDI-based 2-Component Liquid System

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Covestro Bayflex® XGT-16 Polyurethane Elastomeric RIM, MDI-based 2-Component Liquid System
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Characterization: Bayflex XGT-16 Clear is an elastomeric polyurethane system used in the reaction injection molding (RIM) process. Properties / Applications: Bayflex XGT-16 Clear is an elastomeric polyurethane system used in the reaction injection molding (RIM) process. The formulated system is supplied as two liquid components: Component A is a diphenylmethane diisocyanate (MDI) prepolymer, and Component B is a polyether polyol system. Bayflex XGT-16 Clear system has a flexural modulus of 16,00 psi* at room temperature. It is used in applications requiring excellent impact properties, such as bumpers for buses and other vehicles. As with any product, use of the Bayflex XGT-16 Clear system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability. As of 1 September 2015, Bayer MaterialScience was separated from Bayer AG and officially adopted its new name – Covestro.
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Physical Properties	Original Value	Comments

Specific Gravity	1.04 g/cc	Polyol (Component B)
	1.21 g/cc	Isocyanate (Component A)
Density	1.04 g/cc	ASTM D792
Viscosity	600 cP	Polyol (Component B)
	700 cP	Isocyanate (Component A)
Thickness	125 mil
Linear Mold Shrinkage	0.0080 - 0.0090 cm/cm	Bayer Test

Mechanical Properties	Original Value	Comments
Hardness, Shore A	94	ASTM D2240
Hardness, Shore D	45	ASTM D2240
Tensile Strength, Ultimate	17.0 MPa	ASTM D412
Elongation at Break	250 %	ASTM D412
Flexural Modulus	0.110 GPa	ASTM D790
Tear Strength	80.0 kN/m	Die C; ASTM D624
Taber Abrasion, mg/1000 Cycles	200	H-18 wheel, 1000 g Load; ASTM D3489

Thermal Properties	Original Value	Comments
CTE, linear	140 µm/m-°C @Temperature 20.0 °C	ASTM D696
Flash Point	114 °C	Polyol (Component B)
	213 °C	Isocyanate (Component A)

Processing Properties	Original Value	Comments
Mold Temperature	60.0 - 70.0 °C
Cure Time	2.00 - 3.00 min

Descriptive Properties
Appearance	Light yellow to yellow liquid	Isocyanate (Component A)
	Yellow or blue-green to amber liquid	Polyol (Component B)

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Natural Rubber, Not Vulcanized (NR, IR, Polyisoprene)

PB2B89 / 26631

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