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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Shore A	40
Tensile Strength	1.30 MPa
Elongation at Break	170 %
Tear Strength	20.0 pli

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	204 °C
Minimum Service Temperature, Air	-115 °C

Processing Properties	Original Value	Comments
Tack-Free Time	2.00 hour	Catalyzed with Deep Section Catalyst or 100: 0.5 for DBT Catalyst
Gel Time	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

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