CHT Group QSil 222 Transparent, Liquid Silicone Rubber

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CHT Group QSil 222 Transparent, Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Product Description: QSil 222 is a two-part, clear, liquid silicone which cures 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. This material also has excellent primerless adhesion to most substrates. Key Features: Convenient 10:1 mixing ratio for use in automatic dispensing equipment or hand mixing Contains no solvents Non-yellowing catalyst system Heat cure required to obtain full properties and adhesion Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017
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Physical Properties	Original Value	Comments

Specific Gravity	1.00 g/cc	Uncatalyzed, QSil 222B
	1.02 g/cc	Uncatalyzed, QSil 222A
Viscosity	282 cP	Uncatalyzed, QSil 222B
	2390 cP	Uncatalyzed, QSil 222A
Linear Mold Shrinkage	<= 0.0010 cm/cm	Cured 60 minutes @ 150°C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	40	Cured 60 minutes @ 150°C
Tensile Strength	332 psi	Cured 60 minutes @ 150°C
Elongation at Break	128 %	Cured 60 minutes @ 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

Processing Properties	Original Value	Comments
Cure Time	60.0 min @Temperature 150 °C
	120 min @Temperature 100 °C
Gel Time	>= 1440 min	Catalyzed

Descriptive Properties
Color	Clear	Uncatalyzed, QSil 222A
	Clear	Uncatalyzed, QSil 222B
	Clear, colorless	Catalyzed

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PACC2085 / 199473

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