Henkel Loctite® Shadowcure™ 397 Acrylic/urethane Heat Cure Coating

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Henkel Loctite® Shadowcure™ 397 Acrylic/urethane Heat Cure Coating
Categories:	Polymer; Adhesive; Thermoset; Acrylic/Cyanoacrylate Adhesive
Material Notes:	Conformal Coatings Conformal coatings are thin dielectric coatings that extend the longevity of circuit boards by protecting components and traces from corrosion, shorts, and mechanical damage. Loctite offers both acrylic/urethane and silicone conformal coatings which are cured by UV, heat, or a two-part cure mechanism. Loctite® 397 Shadowcure™ Acrylic/urethane Heat Cure Coating Designed to replace historic solvent based heat cure coatings in high reliability applications. No solvents. Low VOC. Cure Type: Heat or Catalytic MIL-I-46058C Approved; UL-746C Approved; IPC-CC-830A Approved; Bellcore TR-NWT-000078 Pending Approval.
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Physical Properties	Original Value	Comments

Viscosity	450 cP	(mixed)

Mechanical Properties	Original Value	Comments
Hardness, Shore D	64	ASTM D2240

Electrical Properties	Original Value	Comments
Surface Resistivity per Square	2.00e+16 ohm	ASTM D257
Dielectric Strength	860 V/mil	ASTM D149

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	125 °C
Minimum Service Temperature, Air	-40.0 °C

Processing Properties	Original Value	Comments
Cure Time	600 sec	Primary Cure is Heat: Full Cure in 10 minutes at 100C. Secondary Cure is Catalytic: Full Cure in 2-5 days without heat, or more than 24 hours at ambient temp.

Descriptive Properties
Capillary Flow	25 sec	Time to flow 0.5" @ 100°C through a gap of 0.001"
Color	Clear/Purple (cured)

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PLOCT174 / 51910

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