CHT Group QM 280 80 Shore A, Addition Cure Moldmaking Material

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CHT Group QM 280 80 Shore A, Addition Cure Moldmaking Material
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Product Description: QM 280 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 280 is exceptionally good where high durometer and dimensional stability are required. Key Features: High durometer Casting resin resistance Fast demold time Excellent dimensional 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 High durometer silicone for roller applications Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017
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Physical Properties	Original Value	Comments

Specific Gravity	1.02 g/cc	QM 280B, Uncatalyzed
	1.50 g/cc	QM 280A, Uncatalyzed
Viscosity	1000 cP	QM 280B, Uncatalyzed
	90000 cP	Catalyzed
	140000 cP	QM 280A, Uncatalyzed
Linear Mold Shrinkage	<= 0.0010 cm/cm	Cured 3 days at 25°C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	80	Cured 3 days at 25°C
Tensile Strength	1100 psi	Cured 3 days at 25°C
Elongation at Break	75 %	Cured 3 days at 25°C
Tear Strength	75.0 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 280A, Uncatalyzed
	Beige	Catalyzed
	Clear	QM 280B, Uncatalyzed

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PACC2060 / 199448

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