BJB Enterprises WC-575 A/B Clear Aliphatic Polyurethane Elastomer

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BJB Enterprises WC-575 A/B Clear Aliphatic Polyurethane Elastomer
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced
Material Notes:	WC-575 A/B is a two-part, clear, colorless aliphatic-based polyurethane elastomer. It is recommended for use whenever a flexible, permanently transparent elastomer is required. It is UV light and oxidation resistant and can be easily tinted or pigmented to clean bright colors. WC-575 A/B does not contain MOCA, TDI, or MDA. In addition to being an excellent cast able product, it also functions well as an adhesive for bonding various substrates.
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Physical Properties	Original Value	Comments

Specific Gravity	1.03 g/cc	Part B
	1.07 g/cc	Part A
Density	1.06 g/cc	ASTM D792
Brookfield Viscosity	300 cP @Temperature 25.0 °C	Part B
	1050 cP @Temperature 25.0 °C	Mixed Part A & Part B
	4725 cP @Temperature 25.0 °C	Part A
Linear Mold Shrinkage	0.0060 in/in	ASTM D2566
Storage Temperature	65.0 - 80.0 °F

Mechanical Properties	Original Value	Comments
Hardness, Shore A	65 - 75	ASTM D2240
Tensile Strength	1370 psi	ASTM D412
Elongation at Break	300 %	ASTM D412
Tear Strength	66.0 pli	ASTM D624

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 71.1 °C	Step 2 recommended high temp cure (as tested).
	120 - 168 hour @Temperature 25.0 °C	Optional low temp cure
Working Life	15.0 min @Temperature 25.0 °C	100 g.
Gel Time	25.0 min
Shelf Life	6.00 Month	Stored at recommended temperatures. Purge opened containers with dry nitrogen before resealing.

Descriptive Properties
Color / Appearance	Colorless	Part A
	Colorless	Part B
	Colorless/clear	Cured
Demold Time (hrs)	6	¼” thick; 4 hours in larger mass. @ 77°F
Mix Ratio by volume	100 to 94	Part A to Part B.
Mix Ratio by weight	100 to 90	Part A to Part B

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PBJB9923 / 287703

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