BJB Enterprises TC-872 A/B Rigid Polyurethane Casting System

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BJB Enterprises TC-872 A/B Rigid Polyurethane Casting System
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	TC-872 A/B is a RoHS compliant, non-mercury based catalyst polyurethane system that produces a tough 70 shore D material. This system has an exceptionally high impact and a high heat deflection temperature which in some cases can be post cured without having to use fixtures. Features: High heat resistance, High Impact, Non-mercury, RoHS/REACH compliant, Working time of 10-12 minutes.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.06 g/cc @Temperature 25.0 °C	1.06 g/cc @Temperature 77.0 °F	Part A
	1.16 g/cc @Temperature 25.0 °C	1.16 g/cc @Temperature 77.0 °F	Part B
Density	1.13 g/cc	0.0408 lb/in³	ASTM D792-00
Brookfield Viscosity	650 cP @Temperature 25.0 °C	650 cP @Temperature 77.0 °F	Part B
	750 cP @Temperature 25.0 °C	750 cP @Temperature 77.0 °F	Mixed
	830 cP @Temperature 25.0 °C	830 cP @Temperature 77.0 °F	Part A
Linear Mold Shrinkage	0.0040 cm/cm	0.0040 in/in	12”x ½” x ½”
Storage Temperature	18.3 - 26.7 °C	65.0 - 80.0 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	68 - 72	68 - 72	ASTM D2240-04e1
Tensile Strength	22.8 MPa	3310 psi	ASTM D638-03
Elongation at Break	28.3 %	28.3 %	ASTM D638-03
Tensile Modulus	0.4919 GPa	71.35 ksi	ASTM D638-03
Flexural Strength	22.86 MPa	3315 psi	ASTM D790-03
Flexural Modulus	0.5838 GPa	84.68 ksi	ASTM D790-03
Izod Impact, Notched	0.950 J/cm	1.78 ft-lb/in	ASTM D256-05

Thermal Properties	Metric	English	Comments
Deflection Temperature at 0.46 MPa (66 psi)	116 °C	240 °F	ASTM D648-04

Processing Properties	Metric	English	Comments
Processing Temperature	<= 93.3 °C	<= 200 °F	Max cure temp.
Cure Time	60.0 - 180 min @Temperature 25.0 °C	1.00 - 3.00 hour @Temperature 77.0 °F	Step 1 recommended high temp cure (as tested).
	960 min @Temperature 82.2 °C	16.0 hour @Temperature 180 °F	Step 2 recommended high temp cure (as tested).
	7200 - 10100 min @Temperature 25.0 °C	120 - 168 hour @Temperature 77.0 °F	Optional low temp cure
Working Life	10.0 - 12.0 min @Temperature 25.0 °C	10.0 - 12.0 min @Temperature 77.0 °F	100 g.
Gel Time	13.0 - 15.0 min	13.0 - 15.0 min
Shelf Life	6.00 Month	6.00 Month	Stored at recommended temperatures. Purge opened containers with dry nitrogen before resealing.

Descriptive Properties
Color / Appearance	Amber		Part B
	Colorless		Part A
	Translucent Pale Yellow		Cured
Demold Time (hrs)	2 - 3		@ 77°F
	2 - 3
Mix Ratio by volume	100 to 32		Part A to Part B
Mix Ratio by weight	100 to 35		Part A to Part 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 view all the property values for this datasheet as they were originally entered into MatWeb.

PBJB9904 / 287685

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