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	Metric	English	Comments

Density	1.07 g/cc	0.0387 lb/in³	ASTM Data
Linear Mold Shrinkage	0.0050 cm/cm	0.0050 in/in
Melt Flow	8.5 g/10 min @Load 3.80 kg, Temperature 230 °C	8.5 g/10 min @Load 8.38 lb, Temperature 446 °F	ASTM Data

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	66.0 MPa	9570 psi	ASTM Data
Tensile Strength, Yield	66.0 MPa	9570 psi	ASTM Data
Elongation at Break	2.4 %	2.4 %	ASTM Data
Tensile Modulus	3.17 GPa	460 ksi	ASTM Data
Izod Impact, Notched	0.210 J/cm	0.393 ft-lb/in	ASTM Data
Charpy Impact Unnotched	1.00 J/cm²	4.76 ft-lb/in²	ISO Data
	1.00 J/cm²	4.76 ft-lb/in²	ISO Data, Low Temp
Charpy Impact, Notched	0.200 J/cm²	0.952 ft-lb/in²	ISO Data
	0.200 J/cm²	0.952 ft-lb/in²	ISO Data, Low Temp

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	60.0 µm/m-°C @Temperature 20.0 °C	33.3 µin/in-°F @Temperature 68.0 °F	ASTM data
Deflection Temperature at 0.46 MPa (66 psi)	94.0 °C	201 °F	Unannealed; ASTM Data
Deflection Temperature at 1.8 MPa (264 psi)	82.0 °C	180 °F	Unannealed; ASTM Data
Vicat Softening Point	108 °C	226 °F
Flammability, UL94	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in
Oxygen Index	18.5 %	18.5 %

Optical Properties	Metric	English	Comments
Haze	0.80 %	0.80 %
Transmission, Visible	89 %	89 %

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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PDW186 / 34417

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