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Acrylic-Styrene-Acrylonitrile (ASA) Typical Properties of Acrylic-Styrene-Acrylonitrile (ASA) American Engineering SI Processing Temperature 450°F to 520°F 232°C to 271°C Linear Mold Shrinkage 0.005 to 0.006 in./in. 0.005 to 0.006 cm/cm Melting Point – – Density 65.6 to 75.5. lb./ft.3 1.05 to 1.21 g/cm3 Tensile Strength, Yield 4.6 to 7.5 lb./in.2 x 103 3.2 to 5.3 kg/cm2 x 102 Tensile Strength, Break 5.5 to 11.4 lb./in.2 x 103 3.9 to 8.0 kg/cm2 x 102 Elongation, Break 3.0 to 70.0% 3.0 to 70.0% Tensile Modulus 3.0 to 4.0 lb./in.2 x 105 2.1 to 2.8 kg/cm2 x 104 Flexural Strength, Yield 7.0 to 12.1 lb./in.2 x 103 4.9 to 8.5 kg/cm2 x 102 Flexural Modulus 2.4 to 5.7 lb./in.2 x 105 1.7 to 4.0 kg/cm2 x 104 Compressive Strength – – Izod Notched, R.T. 0.3 to 20.0 ft.-lb./in. 1.6 to 108.0 kg cm/cm Hardness R85 - R109 Rockwell R85 - R109 Rockwell Thermal Conductivity 1.18 BTU-in./hr.-ft.2-°F 0.17 W/m-°K Linear Thermal Expansion 4.9 to 8.3 in./in.-°F x 10-5 8.8 to 14.9 cm/cm-°C x10-5 Deflection Temperature @ 264 psi 170°F to 225°F 77°C to 107°C Deflection Temperature @ 66 psi 185°F to 230°F 85°C to 110°C Continuous Service Temperature – – Dielectric Strength 400 to 500 V/10-3 in. 1.6 to 2.0 V/mm x 104 Dielectric Constant @ 1 MHz 3.2 to 3.6 3.2 to 3.6 Dissipation Factor @ 1 MHz 0.0004 to 0.019 0.0004 to 0.019 Water Absorption, 24 hr. 0.10 to 0.40% 0.10 to 0.40% Thermoplastic Trade Names • Centrex • Geloy • Kibisan • Luran • Terblend General Description Manufacturer Monsanto Chemical GE Plastics Chi Mei Industrial BASF BASF ASA is an amorphous terpolymer of acrylic, styrene, and acrylonitrile that is produced by mass copolymerization or by grafting styrene- acrylonitrile to the acrylic elastomer backbone. The plastic is known for its toughness, outdoor weatherability, and UV resistance. Specialty grades available include impact resistant, high-gloss, and alloys with PVC and polycarbonate. In 2004, the price of ASA ranged approximately from $1.15 to $2.25 per pound at truckload quantities. General Properties The acrylic elastomer in ASA gives the resin its excellent weatherability characteristics, while the styrene imparts the pleasing surface appearance. ASA can have notched Izod impact strength values as high as 20 ft.-lb./in. (108 kg-cm/cm), and a tensile strength as high as 11,400 psi (800 kg/cm2). ASA is also known for its glossy surface. For example, there are commercially available grades designed for use as capstock in sheet coextrusion processes which have a 60 degree gloss value of 95. With a heat deflection temperature at 264 psi of no more than 225°F (107°C), ASA is not recommended for use in high temperature applications. ASA has good resistance to oils, greases, and salt solutions, but is attacked by ketones, esters, aromatic compounds, chlorinated solvents, and some alcohols. 18 The Loctite® Design Guide for Bonding Plastics, Volume 6 Typical Applications • Automotive – Body moldings, bumper parts • Construction – Wall fixtures, downspouts, gutters, house siding profiles • Sporting goods – Snowmobile and ATV housings, camper tops, windsurfer boards • Miscellaneous – Garden hose fittings, telephone handsets, swimming pool stepsPDF Image | Design Guide for Bonding Plastics Volume 6 LT-2197
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