Sumitomo Bakelite SI 9550 Silicone Molding Compound

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Sumitomo Bakelite SI 9550 Silicone Molding Compound
Categories:	Polymer; Thermoset; Silicone; Silicone, Molded, Glass Fiber Filled
Material Notes:	SI 9550 is a short fiberglass reinforced silicone molding compound, which offers moderate strength properties, and dimensional stability and excellent long-term thermal stability at elevated temperatures. Information provided by Sumitomo Bakelite High Performance Plastics (sbhpp)
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Physical Properties	Original Value	Comments

Specific Gravity	1.89 g/cc	ASTM D792
Apparent Bulk Density	0.900 g/cc	Powder; ASTM D1895
Water Absorption	0.090 % @Time 86400 sec	ASTM D570
Linear Mold Shrinkage	0.0010 - 0.0030 cm/cm	ASTM D955

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	75	ASTM D785
Tensile Strength	38.0 MPa	ASTM D638
Flexural Strength	65.0 MPa	ASTM D790
Flexural Modulus	13.0 GPa	ASTM D790
Compressive Strength	90.0 MPa	ASTM D695
Izod Impact, Notched	22.0 J/m	ASTM D256A

Electrical Properties	Original Value	Comments
Dielectric Strength	8.10 kV/mm @Frequency 60 Hz	SS, wet; ASTM D149
	13.3 kV/mm @Frequency 60 Hz	ST, wet; ASTM D149
Arc Resistance	240 sec	ASTM D495

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	>= 282 °C	Post Baked; ASTM D648A

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PSUMIT196 / 194001

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