CHT ACC17 Silicone coating

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CHT ACC17 Silicone coating
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Description: ACC17 is a fast curing, low viscosity, low volatile, 1-component, condensation curing silicone coating. The uncured product can be applied by pouring 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 volatile content Low viscosity 100% solids Fluorescent UV aid for Production QA checks Excellent adhesion to many substrates Low odor RoHS compliant 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	1.01 g/cc	ASTM D70
Solids Content	100 %	Pensky Martin (closed cup)
Brookfield Viscosity	400 cP
Storage Temperature	5.00 - 40.0 °C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	25	ASTM D 2240-95

Electrical Properties	Original Value	Comments
Volume Resistivity	3.44e+14 ohm-cm	ASTM D-257
Surface Resistance	3.01e+14 ohm	ASTM D-257
Dielectric Constant	2.66 @Frequency 1000 Hz	ASTM D-150
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	-50.0 °C
Flash Point	>= 150 °C	ASTM D93

Processing Properties	Original Value	Comments
Cure Time	4.00 min	Tack free time; AMB 001
	6.00 min	120 microns
	9.00 min	200 microns
	12.0 min	230 microns
	16.0 min	300 microns
	16.0 min	Cure to 300 µm
Shelf Life	12.0 Month

Descriptive Properties
Color	Pale yellow
Rheology	Liquid
Volatile Content	<500 ppm
Volume Coefficient of Thermal Expansion	930 ppm/°C

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PCHTSIL166 / 314649

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