CHT Group QSil 940 QSI Quantum Silicones 40 Durometer Condensation Cure for Potting

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CHT Group QSil 940 QSI Quantum Silicones 40 Durometer Condensation Cure for Potting
Categories:	Polymer; Thermoset; Silicone
Material Notes:	QSil 940 is a special purpose, two-component condensation cure siloxane elastomer that exhibits excellent release properties unless a primer is used which results in excellent adhesion. The material can also be used for applications that have wide temperature range requirements. The two applicable catalysts are 0.5% DBT by weight and 10% Deep Section Catalyst by weight which gives a work life of approximately 45 minutes and a tack free time of 2 hours. The 0.5% catalyst level can be increased or decreased to obtain desired cure speed. Cure speed can be accelerated by adding DBT catalyst in increments of 0.1%. Key Features: Excellent release properties unless a primer is used Variable cure speed Part of the Amber Chemical Group. Data provided by manufacturer. Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017
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Physical Properties	Metric	English	Comments

Specific Gravity	1.04 g/cc	1.04 g/cc	uncatalyzed, DBT Catalyst
	1.20 g/cc	1.20 g/cc
	1.47 g/cc	1.47 g/cc	uncatalyzed, Deep Section Catalyst
Viscosity	650 cP	650 cP	uncatalyzed, Deep Section Catalyst
	12000 cP	12000 cP
Storage Temperature	<= 4.00 °C	<= 39.2 °F	6 months
	<= 27.0 °C	<= 80.6 °F	3 months

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	40	40
Tensile Strength	1.30 MPa	189 psi
Elongation at Break	170 %	170 %
Tear Strength	3.51 kN/m	20.0 pli

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-115 °C	-175 °F

Processing Properties	Metric	English	Comments
Tack-Free Time	120 min	2.00 hour	Catalyzed with Deep Section Catalyst or 100: 0.5 for DBT Catalyst
Gel Time	45.0 min	45.0 min	catalyzed with Deep Section Catalyst or 100: 0.5 for DBT Catalyst

Descriptive Properties
Color	Beige		uncatalyzed, Deep Section Catalyst
	Clear/light yellow		uncatalyzed, DBT Catalyst
	White

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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