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Covestro Bayflex® XGT-2 Polyurethane System, Unfilled
Categories: Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Solid RIM

Material Notes: Characterization: Bayflex XGT 2 is an elastomeric polyurethane system used in the reaction injection molding (RIM) process.

Properties / Applications: Bayflex XGT 2 is an elastomeric polyurethane system used in the reaction injection molding (RIM) process. The system is supplied as two liquid components: Component A is a modified diphenylmethane diisocyanate (MDI), and Component B is a polyether polyol system. The extended gel time of Bayflex XGT 2 gives equipment designers the flexibility to create large, complex parts that can be molded on existing injection machinery. The resin ’s soft feel and the ability to tailor part density through the addition of barium sulfate make this product ideal for applications that require some level of sound absorption, such as floor coverings in heavy trucks or equipment. In addition, the material is soft enough to be used for producing seals, gaskets and wire harness type applications. As with any product, use of the Bayflex XGT 2 system 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 PropertiesOriginal ValueComments
Specific Gravity 1.03 g/ccASTM D1622
 1.05 g/ccPolyol (Component B)
 1.21 g/ccIsocyanate (Component A)
Viscosity 700 cPIsocyanate (Component A)
 1200 cPPolyol (Component B)
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 69
@Time 1.00 sec
ASTM D2240
 69
@Time 5.00 sec
ASTM D2240
Tensile Strength at Break 4.39 MPaparallel, 20 in/min, Die C; ASTM D412
 4.39 MPaperpendicular, 20 in/min, Die C; ASTM D412
Elongation at Break 166 %perpendicular, 20 in/min, Die C; ASTM D412
 170 %parallel, 20 in/min, Die C; ASTM D412
Tear Strength 80.5 pliperpendicular, Die C; ASTM D624
 83.0 pliparallel, Die C; ASTM D624
 
Thermal PropertiesOriginal ValueComments
Flash Point 114 °CPolyol (Component B)
 213 °CIsocyanate (Component A)
 
Processing PropertiesOriginal ValueComments
Mold Temperature 60.0 - 71.0 °C
Moisture Content <= 0.90 %Polyol (Component B)
 
Descriptive Properties
Content22.6-23.1%NCO, Isocyanate (Component A)

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