Lord Adhesives Circalok™ 6403 A BLK/B Urethane Encapsulant System

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Lord Adhesives Circalok™ 6403 A BLK/B Urethane Encapsulant System
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Adhesive
Material Notes:	LORD Circalok™ 6403 A BLK/B urethane encapsulant is a general purpose, two-component urethane designed for applications requiring a fast cure, mechanical shock-resistant system. Circalok 6403 A BLK/B urethane encapsulant does not contain MOCA or TDI. Features: maintains low viscosity for complete and void-free encapsulation. provides excellent protection and resistance to moisture; exhibits excellent hydrolytic stability. provides excellent electrical insulation properties. can be used on parts and devices that experience operating temperatures from -50°C to +120°C. All information provided by Lord.
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Physical Properties	Original Value	Comments

Specific Gravity	0.960 g/cc	6403 A BLK Resin
	1.04 g/cc	Mixed
	1.19 g/cc	6403 B Hardener
Viscosity	750 cP @Temperature 27.0 °C	6403 A BLK Resin
	900 cP @Temperature 27.0 °C	Mixed
	1200 cP @Temperature 27.0 °C	6403 B Hardener

Mechanical Properties	Original Value	Comments
Hardness, Shore A	80	cured
Tensile Strength	1935 psi	cured

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+14 ohm-cm @Temperature 25.0 °C	cured; ASTM D 257
Dielectric Constant	3.6 @Frequency 1000 Hz, Temperature 25.0 °C	cured
Dielectric Strength	600 V/mil	cured
Dissipation Factor	0.14 @Frequency 1000 Hz, Temperature 25.0 °C	cured

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	120 °C
Minimum Service Temperature, Air	-50.0 °C

Processing Properties	Original Value	Comments
Gel Time	5.00 - 10.0 min	mixed
Shelf Life	6.00 Month @Temperature 25.0 - 40.0 °C	each component from date of manufacture

Descriptive Properties
Appearance	Amber Liquid	6403 B Hardener
	Black Liquid	6403 A BLK Resin
	Black Liquid	Mixed

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PLORD9296 / 232652

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