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	Metric	English	Comments

Specific Gravity	1.03 g/cc	1.03 g/cc	Part B
	1.07 g/cc	1.07 g/cc	Part A
Density	1.06 g/cc	0.0383 lb/in³	ASTM D792
Brookfield Viscosity	300 cP @Temperature 25.0 °C	300 cP @Temperature 77.0 °F	Part B
	1050 cP @Temperature 25.0 °C	1050 cP @Temperature 77.0 °F	Mixed Part A & Part B
	4725 cP @Temperature 25.0 °C	4725 cP @Temperature 77.0 °F	Part A
Linear Mold Shrinkage	0.0060 cm/cm	0.0060 in/in	ASTM D2566
Storage Temperature	18.3 - 26.7 °C	65.0 - 80.0 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	65 - 75	65 - 75	ASTM D2240
Tensile Strength	9.45 MPa	1370 psi	ASTM D412
Elongation at Break	300 %	300 %	ASTM D412
Tear Strength	11.6 kN/m	66.0 pli	ASTM D624

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 71.1 °C	16.0 hour @Temperature 160 °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	15.0 min @Temperature 25.0 °C	15.0 min @Temperature 77.0 °F	100 g.
Gel Time	25.0 min	25.0 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	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

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.

PBJB9923 / 287703

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