Volume 4 - Loctite.ph

Acrylic-Styrene-Acrylonitrile (ASA)ThermoplasticTrade Names• Centrex• Geloy• Kibisan• Luran• TerblendManufacturerMonsanto ChemicalGE PlasticsChi Mei IndustrialBASFBASFTypical Properties ofAcrylic-Styrene-Acrylonitrile (ASA)American EngineeringProcessing Temperature 450°F to 520°F 232°C to 271°CLinear Mold Shrinkage 0.005 to 0.006 in./in. 0.005 to 0.006 cm/cmMelting Point – –SIGeneral DescriptionASA is an amorphous terpolymer of acrylic, styrene, and acrylonitrilethat is produced by mass copolymerization or by grafting styreneacrylonitrileto the acrylic elastomer backbone. The plastic is known forits toughness, outdoor weatherability, and UV resistance. Specialtygrades available include impact resistant, high-gloss, and alloys withPVC and polycarbonate. In 2004, the price of ASA ranged approximatelyfrom $1.15 to $2.25 per pound at truckload quantities.General PropertiesThe acrylic elastomer in ASA gives the resin its excellent weatherabilitycharacteristics, while the styrene imparts the pleasing surfaceappearance. ASA can have notched Izod impact strength values ashigh as 20 ft.-lb./in. (108 kg-cm/cm), and a tensile strength as high as11,400 psi (800 kg/cm 2 ). ASA is also known for its glossy surface. Forexample, there are commercially available grades designed for use ascapstock in sheet coextrusion processes which have a 60 degree glossvalue of 95. With a heat deflection temperature at 264 psi of no morethan 225°F (107°C), ASA is not recommended for use in hightemperature applications. ASA has good resistance to oils, greases,and salt solutions, but is attacked by ketones, esters, aromaticcompounds, chlorinated solvents, and some alcohols.Density 65.6 to 75.5. lb./ft. 3 1.05 to 1.21 g/cm 3Tensile Strength, Yield 4.6 to 7.5 lb./in. 2 x 10 3 3.2 to 5.3 kg/cm 2 x 10 2Tensile Strength, Break 5.5 to 11.4 lb./in. 2 x 10 3 3.9 to 8.0 kg/cm 2 x 10 2Elongation, Break 3.0 to 70.0% 3.0 to 70.0%Tensile Modulus 3.0 to 4.0 lb./in. 2 x 10 5 2.1 to 2.8 kg/cm 2 x 10 4Flexural Strength, Yield 7.0 to 12.1 lb./in. 2 x 10 3 4.9 to 8.5 kg/cm 2 x 10 2Flexural Modulus 2.4 to 5.7 lb./in. 2 x 10 5 1.7 to 4.0 kg/cm 2 x 10 4Compressive Strength – –Izod Notched, R.T. 0.3 to 20.0 ft.-lb./in. 1.6 to 108.0 kg cm/cmHardness R85 - R109 Rockwell R85 - R109 RockwellThermal Conductivity 1.18 BTU-in./hr.-ft. 2 -°F 0.17 W/m-°KLinear ThermalExpansionDeflection Temperature@ 264 psiDeflection Temperature@ 66 psiContinuousService Temperature4.9 to 8.3 in./in.-°F x 10 -5 8.8 to 14.9 cm/cm-°C x10 -5170°F to 225°F 77°C to 107°C185°F to 230°F 85°C to 110°C– –Dielectric Strength 400 to 500 V/10 -3 in. 1.6 to 2.0 V/mm x 10 4Dielectric Constant@ 1 MHzDissipation Factor@ 1 MHzWater Absorption,24 hr.3.2 to 3.6 3.2 to 3.60.0004 to 0.019 0.0004 to 0.0190.10 to 0.40% 0.10 to 0.40%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 steps18The Loctite ® Design Guide for Bonding Plastics, Volume 4