CHT SilSo Clear 21002 Liquid Silicone

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CHT SilSo Clear 21002 Liquid Silicone
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	Description: This product is a transparent and colorless silicone formulation and is ideal for optical injection molding applications. The viscosity profile enables excellent flow around components and is excellent for potting complex parts. The chemical composition results in a cured product that is hydrolytically stable as well as reversion resistant. The silicone elastomer provides electrical insulation and physical shock resistance of components and enables environmental protection. Key Features Convenient mixing 1:1 ratio for use in automatic dispensing equipment or hand mixing Contains no solvents Non-yellowing catalyst system Stable transmittance over time Key Applications Injection molding Optical / magnifying lenses LED modules Solar collection products Application: SilSo Clear 21002 is designed for optical injection molding applications such as lenses, lightguides and LEDs. Information provided by CHT Group
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Physical Properties	Metric	English	Comments

Density	1.03 g/cc	0.0372 lb/in³	A; BS ISO 2781
	1.03 g/cc	0.0372 lb/in³	B; BS ISO 2781
	1.03 g/cc	0.0372 lb/in³	Cured Product; BS ISO 2781
Brookfield Viscosity	10000 cP	10000 cP	B
	13500 cP	13500 cP	Mixed
	17000 cP	17000 cP	A
Storage Temperature	<= 38.0 °C	<= 100 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	67	67	ASTM D2240-95
Tensile Strength	9.31 MPa	1350 psi	ISO 37
Elongation at Break	110 %	110 %	ISO 37

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	ASTM D-257
Dielectric Strength	18.7 kV/mm	475 kV/in	ASTM D-149
Dielectric Breakdown	<= 100 V	<= 100 V

Thermal Properties	Metric	English	Comments
CTE, linear	320 µm/m-°C	178 µin/in-°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	1.41	1.41

Processing Properties	Metric	English	Comments
Pot Life	>= 1440 min	>= 1440 min
Shelf Life	24.0 Month	24.0 Month

Descriptive Properties
Color	Clear		A
	Clear		B
	Transparent, colorless		Cured Product
Cure type	Addition
Mix Ratio	1:1		By Weight
Self Bonding	No
Volume Coefficient of Thermal Expansion	960 ppm/°C

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PCHTSIL071 / 314554

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