CHT ALPA-SIL 28 Silicone Molding Rubber

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CHT ALPA-SIL 28 Silicone Molding Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber
Material Notes:	Description: This is a pourable 2-part addition cure silicone elastomer system. After mixing parts ‘A’ and ‘B’ in the correct proportions, the system will cure at ambient temperatures within 24 hours, but the rate of cure can be accelerated by heat. The cured rubber exhibits excellent physical and electrical properties. Key Features Crosslinks at temperatures as of 23 °C/77°F Easy mixing of the components Very good tensile strength and tear propagation resistance Crosslinks to a green, resisting, rubbery-elastic vulcanisate without reaction heat Application: doubling in the dental sector and in mould and prototype making Information provided by CHT Group
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Physical Properties	Metric	English	Comments

Density	1.30 g/cc	0.0470 lb/in³	A; BS ISO 2781
	1.30 g/cc	0.0470 lb/in³	B; BS ISO 2781
	1.30 g/cc	0.0470 lb/in³	Cured Product; BS ISO 2781
Brookfield Viscosity	5000 cP	5000 cP	B
	5900 cP	5900 cP	Mixed
	6700 cP	6700 cP	A
Linear Mold Shrinkage	0.0010 cm/cm	0.0010 in/in
Storage Temperature	<= 30.0 °C	<= 86.0 °F

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	27 - 31	27 - 31	DIN 53 505
Tensile Strength	3.70 MPa	537 psi	ISO 37
Elongation at Break	360 %	360 %	ISO 37
Tear Strength	4.91 kN/m	28.0 pli	BS ISO 34-1

Processing Properties	Metric	English	Comments
Cure Time	30.0 min	0.500 hour	De-mould Time / Full Cure
Pot Life	6.00 - 8.00 min	6.00 - 8.00 min
Shelf Life	12.0 Month	12.0 Month

Descriptive Properties
Appearance	Green
Color	Green		Cured Product
	White		A
Cure type	Addition
Mix Ratio	1:1		By Weight

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PCHTSIL087 / 314570

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