CHT Group QSil 219 Transparent, Liquid Silicone Rubber

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CHT Group QSil 219 Transparent, Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Product Description: QSil 219 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. This material meets Mil-I-81550C (type II) standard. Key Features: Convenient 10:1 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	Metric	English	Comments

Specific Gravity	1.00 g/cc	1.00 g/cc	Uncatalyzed, QSil 219B
	1.02 g/cc	1.02 g/cc	Uncatalyzed, QSil 219A
Viscosity	500 cP	500 cP	Uncatalyzed, QSil 219B
	4000 cP	4000 cP	Uncatalyzed, QSil 219A
Linear Mold Shrinkage	<= 0.0010 cm/cm	<= 0.0010 in/in	Cured 60 minutes @ 100°C

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	40	40	Cured 60 minutes @ 100°C
Tensile Strength	5.17 MPa	750 psi	Cured 60 minutes @ 100°C
Elongation at Break	100 %	100 %	Cured 60 minutes @ 100°C

Thermal Properties	Metric	English	Comments
CTE, linear	275 µm/m-°C	153 µin/in-°F

Processing Properties	Metric	English	Comments
Cure Time	60.0 min @Temperature 100 °C	1.00 hour @Temperature 212 °F	As Tested
Gel Time	300 - 480 min	300 - 480 min	Catalyzed

Descriptive Properties
Color	Clear		Uncatalyzed, QSil 219A
	Clear		Uncatalyzed, QSil 219B
	Clear, colorless		Catalyzed

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PACC2083 / 199471

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