BJB Enterprises TC-854 A/B Rigid Polyurethane Casting System

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BJB Enterprises TC-854 A/B Rigid Polyurethane Casting System
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	Rigid Polyurethane Polycarbonate-like TC-854 is an extremely stiff, high impact, translucent material making it ideal when exact color matching is required. When coupled with the low viscosity, low shrink and high heat deflection temperature, this material is always a popular choice for a wide variety of applications. Features: RoHS/REACH compliant, Odorless, Translucent, High impact strength, Low viscosity, High heat distortion temperature, Excellent for hand, vacuum, or pressure casting.
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Physical Properties	Original Value	Comments

Specific Gravity	1.07 g/cc	Part B
	1.17 g/cc	Part A
Density	1.20 g/cc	ASTM D792-00
Brookfield Viscosity	165 cP @Temperature 25.0 °C	Part A
	450 cP @Temperature 25.0 °C	Mixed
	725 cP @Temperature 25.0 °C	Part B
Linear Mold Shrinkage	0.0010 in/in	12”x1/2”x1/2”
Storage Temperature	65.0 - 80.0 °F

Mechanical Properties	Original Value	Comments
Hardness, Shore D	82 - 86	ASTM D2240-04e1
Tensile Strength	10060 psi	ASTM D638-03
Elongation at Break	10.5 %	ASTM D638-03
Tensile Modulus	330000 psi	ASTM D638-03
Flexural Strength	13700 psi	ASTM D790-03
Flexural Modulus	360000 psi	ASTM D790-03
Izod Impact, Notched	1.14 ft-lb/in	ASTM D256-05

Thermal Properties	Original Value	Comments
Deflection Temperature at 0.46 MPa (66 psi)	185 - 195 °F	ASTM D648-04
Deflection Temperature at 1.8 MPa (264 psi)	165 - 175 °F	ASTM D648-04

Processing Properties	Original Value	Comments
Processing Temperature	<= 200 °F	Max cure temp.
Cure Time	1.00 - 3.00 hour @Temperature 25.0 °C	Step 1 recommended high temp cure (as tested).
	16.0 hour @Temperature 82.2 °C	Step 2 recommended high temp cure (as tested).
	120 - 168 hour @Temperature 25.0 °C	Optional low temp cure
Working Life	6.00 - 8.00 min @Temperature 25.0 °C	100 g.
Gel Time	7.00 - 9.00 min
Shelf Life	6.00 Month	Stored at recommended temperatures.

Descriptive Properties
Color / Appearance	Colorless	Part B
	Pale Yellow	Part A
	Transparent Pale Yellow	Cured
Demold Time (hrs)	2 - 3	@ 77°F
Mix Ratio by volume	100 to 66	Part A to Part B
Mix Ratio by weight	100 to 60	Part A to Part B

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PPOLYT9907 / 287687

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