CHT ACC15 Silicone coating

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CHT ACC15 Silicone coating
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Description: ACC15 is a low viscosity, 1-component, condensation curing silicone coating. The uncured product can be applied by pouring or brushing and is readily cured to a tough, transparent rubber. It can be used to coat printed circuit boards to prevent ingress of water and environmental contaminants. Key Features UL listed file number E493561 Room temperature cure or mild heat acceleration at 60ºC Low viscosity 100% solids Fluorescent UV aid for production QA checks Excellent adhesion to many substrates Low odour RoHS compliant Application: The bulk product may be poured or brushed onto the circuit. Pouring or brushing will give a film thickness of 100 to 1000 microns. The product contains an UV trace to allow inspection of the board after coating to ensure complete and even coverage. Boards should be thoroughly cleaned before coating for best adhesion / performance. Coating over no clean fluxes is possible so long as other surface contaminants are not present. Cured Elastomer: After 7 days at 25°C / 55 +/- 5% Humidity on a 3 mm thick test sheet. Information provided by CHT Group
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Physical Properties	Original Value	Comments

Density	1.02 g/cc	ASTM D70
Solids Content	100 %	Pensky Martin (closed cup)
Brookfield Viscosity	1180 cP

Mechanical Properties	Original Value	Comments
Hardness, Shore A	18	ASTM D 2240-95

Electrical Properties	Original Value	Comments
Volume Resistivity	1.88e+15 ohm-cm	ASTM D-257
Surface Resistance	8.59e+14 ohm	ASTM D-257
Dielectric Strength	470 V/mil	ASTM D-149

Thermal Properties	Original Value	Comments
CTE, linear	310 µm/m-°C
Maximum Service Temperature, Air	200 °C
Minimum Service Temperature, Air	-55.0 °C
Flash Point	>= 150 °C	ASTM D93

Processing Properties	Original Value	Comments
Cure Time	12.0 min	Tack free time; AMB 001
	40.0 min	Cure to 1 mm

Descriptive Properties
Appearance	Liquid
Volume Coefficient of Thermal Expansion	930 ppm/°C

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PCHTSIL165 / 314648

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