CHT Group QM 254 60 Shore A, Addition Cure Moldmaking Material

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CHT Group QM 254 60 Shore A, Addition Cure Moldmaking Material
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Product Description: QM 254 is a two-component, room temperature, addition cure, silicone material. The cured rubber has excellent mechanical properties, good shelf-life stability, excellent physical properties and resin resistance. This material is a good choice for the molding of furniture, picture frames and architectural materials. QM 254 is exceptionally good where high durometer and dimensional stability are required. This material also has excellent thermal stability. Key Features: High durometer Low viscosity Casting resin resistance Fast demold time Excellent dimensional stability Excellent thermal stability Main Applications: Molds for architectural replication Molds for polyester, epoxy resin casting, and rigid or foam polyurethane Molds for technical articles and prototypes Molds for furniture and picture frame replication 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	QM 254B, Uncatalyzed
	1.26 g/cc	QM 254A, Uncatalyzed
Viscosity	3500 cP	Catalyzed
	6000 cP	QM 254B, Uncatalyzed
	45000 cP	QM 254A, Uncatalyzed
Linear Mold Shrinkage	<= 0.0010 cm/cm	Cured 3 days at 25°C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	60	Cured 3 days at 25°C
Tensile Strength	1000 psi	Cured 3 days at 25°C
Elongation at Break	140 %	Cured 3 days at 25°C
Tear Strength	90.0 pli	Cured 3 days at 25°C

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	204 °C	Cured 3 days at 25°C
Minimum Service Temperature, Air	-55.0 °C	Cured 3 days at 25°C

Processing Properties	Original Value	Comments
Cure Time	8.00 - 12.0 hour	Demold time, Catalyzed
	72.0 hour @Temperature 25.0 °C
Pot Life	60.0 min	Catalyzed

Descriptive Properties
Color	Beige	QM 254A, Uncatalyzed
	Black	QM 254B, Uncatalyzed
	Black	Catalyzed

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PACC2052 / 199440

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