Dow Tyril® 990 SAN

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Dow Tyril® 990 SAN (discontinued **)
Categories:	Polymer; Thermoplastic; SAN Polymer; Styrene Acrylonitrile (SAN), Transparent
Material Notes:	TYRIL® 990 SAN copolymer grade provides colorless glass-like clarity and excellent overall optical properties. It provides a profile of very good strength with stiffness, chemical resistance, heat resistance, and excellent processability. Data provided by Dow Chemical. Tyril is now a Trinseo product line; this specific grade was discontinued while still a Dow product.
Key Words:	Poly(Styrene Acrylonitrile)
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Physical Properties	Original Value	Comments

Density	1.07 g/cc	ASTM Data
Linear Mold Shrinkage	0.0050 cm/cm
Melt Flow	8.5 g/10 min @Load 3.80 kg, Temperature 230 °C	ASTM Data

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	66.0 MPa	ASTM Data
Tensile Strength, Yield	66.0 MPa	ASTM Data
Elongation at Break	2.4 %	ASTM Data
Tensile Modulus	3.17 GPa	ASTM Data
Izod Impact, Notched	0.210 J/cm	ASTM Data
Charpy Impact Unnotched	1.00 J/cm²	ISO Data
	1.00 J/cm²	ISO Data, Low Temp
Charpy Impact, Notched	0.200 J/cm²	ISO Data
	0.200 J/cm²	ISO Data, Low Temp

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	60.0 µm/m-°C @Temperature 20.0 °C	ASTM data
Deflection Temperature at 0.46 MPa (66 psi)	94.0 °C	Unannealed; ASTM Data
Deflection Temperature at 1.8 MPa (264 psi)	82.0 °C	Unannealed; ASTM Data
Vicat Softening Point	108 °C
Flammability, UL94	HB @Thickness 1.60 mm
Oxygen Index	18.5 %

Optical Properties	Original Value	Comments
Haze	0.80 %
Transmission, Visible	89 %

**
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PDW186 / 34417

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