CHT Group QSil 229 Transparent, Liquid Silicone Rubber

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CHT Group QSil 229 Transparent, Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Product Description: QSil 229 is a two-part, heat cured, optically clear liquid silicone, which exhibits great transmittance. 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 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	Metric	English	Comments

Specific Gravity	1.00 g/cc	1.00 g/cc	Uncatalyzed, QSil 229A
	1.00 g/cc	1.00 g/cc	Uncatalyzed, QSil 229B
Viscosity	2900 cP	2900 cP	Uncatalyzed, QSil 229A
	2900 cP	2900 cP	Uncatalyzed, QSil 229B
Linear Mold Shrinkage	<= 0.0010 cm/cm	<= 0.0010 in/in	Cured 60 minutes @ 150°C

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	65	65	Cured 60 minutes @ 150°C

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.70e+15 ohm-cm	1.70e+15 ohm-cm
Dielectric Constant	2.69 @Frequency 1000 Hz	2.69 @Frequency 1000 Hz
Dielectric Strength	19.7 kV/mm	500 kV/in
Dissipation Factor	0.00060 @Frequency 1000 Hz	0.00060 @Frequency 1000 Hz

Thermal Properties	Metric	English	Comments
CTE, linear	275 µm/m-°C	153 µin/in-°F
Specific Heat Capacity	0.700 J/g-°C	0.167 BTU/lb-°F
Thermal Conductivity	0.180 W/m-K	1.25 BTU-in/hr-ft²-°F
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.405	1.405
Transmission, Visible	>= 98 % @Thickness 1.00 mm, Wavelength 400 nm	>= 98 % @Thickness 0.0394 in, Wavelength 400 nm

Processing Properties	Metric	English	Comments
Cure Time	60.0 min @Temperature 150 °C	1.00 hour @Temperature 302 °F
	120 min @Temperature 120 °C	2.00 hour @Temperature 248 °F

Descriptive Properties
Color	Clear		Catalyzed
	Clear to cloudy		Uncatalyzed, QSil 229A
	Clear to cloudy		Uncatalyzed, QSil 229B

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PACC2087 / 199475

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