BJB Enterprises TC-891 FR REV 1 Rigid Polyurethane Casting System

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BJB Enterprises TC-891 FR REV 1 Rigid Polyurethane Casting System
Categories:	Polymer; Thermoset; Polyurethane, TS
Material Notes:	This tough 80 Shore D Flame Retardant material is UL Listed with a flammability rating at 1/16 inch (1.6 mm). It’s great for hand casting or machine dispensing electronic enclosures, or any parts requiring flame retardant characteristics. The 12 to 14 minute work time exhibits very low shrinkage and exceptional physical properties. Also available in a variety of work times as TC-890, 892, and 894 FR REV 1.
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Physical Properties	Original Value	Comments

Specific Gravity	1.18 g/cc @Temperature 25.0 °C	Part A
	1.33 g/cc @Temperature 25.0 °C	Part B
Density	1.30 g/cc	ASTM D792-00
Brookfield Viscosity	325 cP @Temperature 25.0 °C	Part A
	740 cP @Temperature 25.0 °C	Mixed Part A & Part B
	1450 cP @Temperature 25.0 °C	Part B
Linear Mold Shrinkage	0.00050 in/in	12”x1/2”x1/2”
Storage Temperature	65.0 - 80.0 °F	Purge opened containers with dry nitrogen before re-sealing.

Mechanical Properties	Original Value	Comments
Hardness, Shore D	78 - 82	ASTM D2240-04e1
Tensile Strength	6117 psi	ASTM D638-03
Elongation at Break	21 %	ASTM D638-03
Tensile Modulus	250000 psi	ASTM D638-03
Flexural Strength	10126 psi	ASTM D790-03
Flexural Modulus	281000 psi	ASTM D790-03
Izod Impact, Notched	0.580 ft-lb/in	ASTM D256-05

Electrical Properties	Original Value	Comments
Dielectric Constant	3.241 @Frequency 1e+6 Hz	ASTM D150-87
Dissipation Factor	0.014 @Frequency 1e+6 Hz	ASTM D150-87

Thermal Properties	Original Value	Comments
Deflection Temperature at 0.46 MPa (66 psi)	186 °F	ASTM D648-04
Deflection Temperature at 1.8 MPa (264 psi)	168 °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	12.0 - 14.0 min @Temperature 25.0 °C	100 g.
Gel Time	13.0 - 15.0 min
Shelf Life	6.00 Month	Stored at recommended temperatures.

Descriptive Properties
Ball Pressure Test (mm)	1.3	IEC 60695-10-2. @ 167°F
Color / Appearance	White	Part B
	white / opaque	Cured
	Yellow	Part A
Demold Time (hrs)	3 - 4	@ 77°F
Mix Ratio by volume	100	Part B
	79	Part A
Mix Ratio by weight	70 to 100	Part A to Part B

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PBJB9901 / 287682

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