CHT Group QM 258 60 Shore A, Addition Cure Moldmaking Material

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CHT Group QM 258 60 Shore A, Addition Cure Moldmaking Material
Categories:	Polymer; Thermoset; Silicone
Material Notes:	Product Description: QM 258 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 258 is exceptionally good where high durometer and dimensional stability are required. Key Features: High durometer Casting resin resistance Fast demold time Excellent dimensional stability ROHS compliant; contains no regulated compounds Main Applications: Rubber roller production 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	1.03 g/cc	QM 258B, Uncatalyzed
	1.28 g/cc	QM 258A, Uncatalyzed
Viscosity	5000 cP	QM 258B, Uncatalyzed
	100000 cP	Catalyzed
	125000 cP	QM 258A, Uncatalyzed
Linear Mold Shrinkage	<= 0.0010 cm/cm	Cured 3 days at 150°C

Mechanical Properties	Original Value	Comments
Hardness, Shore A	64	Cured 3 days at 150°C
Tensile Strength	931 psi	Cured 3 days at 150°C
Elongation at Break	236 %	Cured 3 days at 150°C
Tear Strength	110 pli	Cured 3 days at 150°C

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	204 °C	Cured 3 days at 150°C
Minimum Service Temperature, Air	-55.0 °C	Cured 3 days at 150°C

Processing Properties	Original Value	Comments
Cure Time	12.0 - 18.0 hour	Demold time, Catalyzed
	72.0 hour @Temperature 25.0 °C
Pot Life	60.0 min	Catalyzed

Descriptive Properties
Color	Beige	QM 258A, Uncatalyzed
	Green	QM 258B, Uncatalyzed
	Light Green	Catalyzed

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PACC2054 / 199442

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