CHT Group QM 245 QSI Quantum Silicones 45 Durometer Addition Cure Moldmaking Material

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CHT Group QM 245 QSI Quantum Silicones 45 Durometer Addition Cure Moldmaking Material
Categories:	Polymer; Thermoset; Silicone
Material Notes:	QM 245 is a two component, room temperature addition cure silicone material. The cured rubber has excellent mechanical properties and good shelf-life stability. This material is a good choice for the molding of furniture, picture frames and architectural materials. QM 245 is exceptionally good where highly detailed parts and mold flexibility are required. Complies with FDA indirect food contact regulation CFR 177.2600 (Red Catalyst only is CFR 177.2600 compliant) Key Features: Excellent tear resistance Casting resin resistance Fast demold time Good mold flexibility Main Applications: Molds for architectural replication Molds for polyester, polyurethane and epoxy resin castings Molds for technical articles and prototype Molds for furniture and picture frame replication Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017
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Physical Properties	Metric	English	Comments

Specific Gravity	0.960 g/cc	0.960 g/cc	Uncatalyzed, QM 245B
	1.34 g/cc	1.34 g/cc	Base
Viscosity	2000 cP	2000 cP	Uncatalyzed, QM 245B
	30000 cP	30000 cP	catalyzed with QM 245B
	50000 cP	50000 cP	Base
Linear Mold Shrinkage	<= 0.0010 cm/cm	<= 0.0010 in/in	cured 72 hrs @ RT
Storage Temperature	<= 38.0 °C	<= 100 °F	12 months

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	45	45	cured 72 hrs @ RT
Tensile Strength	4.10 MPa	595 psi	cured 72 hrs @ RT
Elongation at Break	400 %	400 %	cured 72 hrs @ RT

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	204 °C	399 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F

Processing Properties	Metric	English	Comments
Cure Time	400 - 500 min	6 - 8 hour	Demold time, catalyzed with QM 230F B
Pot Life	42.0 min	42.0 min	catalyzed with QM 245F B

Compliance Properties	Metric	English	Comments
FDA	Yes	Yes

Descriptive Properties
Color	Beige		Base
	Dark Red		Uncatalyzed, QM 245B
	Red		catalyzed with QM 245F B

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