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Master Bond adhesives

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Covestro Bayflex® XGT-140 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-140 is an elastomeric polyurethane system used in the reaction injection molding (RIM) process.

Properties / Applications: Bayflex XGT-140 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-140 system gives equipment designers the flexibility to create large, complex parts that can be molded on existing injection machinery. The resin ’s excellent surface quality and high impact resistance make it a candidate for agricultural equipment, heavy-duty trucks, specialty transportation, and marine applications. As with any product, use of the Bayflex XGT-140 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 PropertiesOriginal ValueComments
Specific Gravity 1.04 g/ccPolyol (Component B)
 1.21 g/ccIsocyanate (Component A)
Density 1.04 g/ccASTM D792
Viscosity 550 cPPolyol (Component B)
 700 cPIsocyanate (Component A)
Thickness 125 mil
Linear Mold Shrinkage 0.0085 cm/cmBayer Test
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore D 71ASTM D2240
Tensile Strength, Ultimate 29.0 MPaASTM D412
Elongation at Break 80 %ASTM D412
Flexural Modulus 50000 psi
@Temperature 65.0 °C
ASTM D790
 140000 psi
@Temperature 23.0 °C
ASTM D790
 260000 psi
@Temperature -30.0 °C
ASTM D790
Izod Impact, Notched 2.40 J/cmASTM D256
Tear Strength 120 kN/mDie C; ASTM D624
 
Thermal PropertiesOriginal ValueComments
CTE, linear 110 µm/m-°C
@Temperature 20.0 °C
ASTM D696
Deflection Temperature at 0.46 MPa (66 psi) 55.0 °CASTM D648
Flash Point 110 °CPolyol (Component B)
 213 °CIsocyanate (Component A)
 
Processing PropertiesOriginal ValueComments
Mold Temperature 60.0 - 70.0 °C
 
Descriptive Properties
AppearanceLight yellow to yellow liquidIsocyanate (Component A)
 Viscous liquidPolyol (Component 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 go back to viewing the property data in MatWeb's normal format.

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