CHT ACC18 Silicone coating

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CHT ACC18 Silicone coating
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Description: ACC18 is a fast curing, low viscosity, 1-component, condensation curing silicone coating. The uncured product can be applied by pouring, brushing or spraying 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 Fast Room temperature cure Low viscosity Fluorescent UV aid for Production QA checks Excellent adhesion to many substrates Excellent adhesion to Humiseal 1.94V-0 boards Low odor RoHS compliant Cured Elastomer: After 7 days at 23°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	0.980 g/cc	ASTM D70
Brookfield Viscosity	260 cP
Storage Temperature	5.00 - 40.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	36	ASTM D 2240-95

Electrical Properties	Original Value	Comments
Volume Resistivity	3.60e+14 ohm-cm	ASTM D-257
Dielectric Constant	2.49 @Frequency 1000 Hz	ASTM D-150
Dielectric Strength	>= 457 V/mil	ASTM D-149
Dissipation Factor	0.00060	ASTM D-150

Thermal Properties	Original Value	Comments
CTE, linear	310 µm/m-°C
Maximum Service Temperature, Air	200 °C
Minimum Service Temperature, Air	-50.0 °C

Processing Properties	Original Value	Comments
Cure Time	3.00 - 6.00 min	Tack free time; AMB 001
	16.0 min	Cure to 300 µm
Shelf Life	12.0 Month

Descriptive Properties
Color	Pale yellow
Rheology	Liquid
Volume Coefficient of Thermal Expansion	930 ppm/°C

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PCHTSIL167 / 314650

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