CHT Group QSil 223 Transparent, Liquid Silicone Rubber

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CHT Group QSil 223 Transparent, Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Product Description: QSil 223 is a two-part, clear, liquid silicone which will cure at room temperature or at elevated temperatures. It has a low viscosity which allows for ease of flow around complex parts, providing electrical insulation and shock resistance. The chemical composition provides hydrolytic and reversion resistance. Key Features: Convenient 1:1 mixing ratio for use in automatic dispensing equipment or hand mixing Contains no solvents Non-yellowing catalyst system Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017
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Physical Properties	Original Value	Comments

Specific Gravity	1.03 g/cc	Uncatalyzed, QSil 223A
	1.03 g/cc	Uncatalyzed, QSil 223B
Viscosity	2400 cP	Uncatalyzed, QSil 223B
	3200 cP	Uncatalyzed, QSil 223A
Linear Mold Shrinkage	<= 0.0010 cm/cm	Cured

Mechanical Properties	Original Value	Comments
Hardness, Shore A	51	Cured 24 hours @ 25°C
	53	Cured 1 hour @ 70°C
	65	Cured 1 hour @ 150°C

Electrical Properties	Original Value	Comments
Volume Resistivity	1.70e+15 ohm-cm
Dielectric Constant	2.69 @Frequency 1000 Hz
Dielectric Strength	19.7 kV/mm
Dissipation Factor	0.00060 @Frequency 1000 Hz

Thermal Properties	Original Value	Comments
CTE, linear	275 µm/m-°C
Specific Heat Capacity	0.700 J/g-°C
Thermal Conductivity	0.180 W/m-K
Maximum Service Temperature, Air	204 °C
Minimum Service Temperature, Air	-55.0 °C
Flammability, UL94	HB @Thickness 1.70 mm

Optical Properties	Original Value	Comments
Refractive Index	1.405
Transmission, Visible	>= 98 % @Thickness 1.00 mm, Wavelength 400 nm

Processing Properties	Original Value	Comments
Cure Time	60.0 min @Temperature 70.0 °C
	60.0 min @Temperature 150 °C
	1440 min @Temperature 25.0 °C
Gel Time	120 min	Catalyzed

Descriptive Properties
Color	Clear	Uncatalyzed, QSil 223A
	Clear	Uncatalyzed, QSil 223B
	Clear, colorless	Catalyzed

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PACC2086 / 199474

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