ASA (Acrylonitrile Styrene Acrylate) Compounds

Acrylonitrile Styrene Acrylate (ASA) is a high-performance styrene acrylates copolymer engineered for demanding outdoor and automotive applications. ASA compounds combine ASA resin with additives such as stabilizers, pigments, and impact modifiers to tailor material performance for specific technical and aesthetic requirements.

Key ASA plastic properties include excellent UV stability, high weather resistance, good impact strength, and long-term color retention. Unlike conventional styrenics, ASA maintains mechanical integrity and surface appearance under prolonged exposure to sunlight, moisture, and temperature changes. These characteristics make ASA an ideal solution for automotive exterior parts, industrial housings, outdoor profiles, and consumer products exposed to harsh environments.

Unique Properties

ASA compounds offer unique properties and advantages, including:

Weather Resistance: They exhibit excellent weather resistance, making them suitable for prolonged outdoor exposure without degradation.
UV Stability: ASA compounds are highly stable against UV radiation, ensuring long-lasting color and appearance retention.

Toughness: They are tough materials that can withstand impact and mechanical stress.
Chemical Resistance: ASA compounds offer resistance to a wide range of chemicals and solvents, enhancing their durability.
Ease of Processing: They are easily molded using common plastic processing techniques, including injection molding and extrusion.

About our suppliers

Polykemi, RTP, and Lotte Chemical are leading suppliers of high-quality polymer compounds and ASA resins.

Polykemi is known for reliable ASA compounds with consistent performance, tailored for automotive, industrial, and consumer applications. RTP specializes in custom-engineered thermoplastics, delivering ASA mixtures with precise mechanical and aesthetic properties. Lotte Chemical provides innovative ASA resins designed for long-term outdoor durability and high weather resistance, supporting both performance and sustainability requirements.

Typical Applications of ASA Compounds

Automotive Applications

ASA compounds are extensively used in automotive exterior components where resistance to UV radiation, weathering, and mechanical impact is essential throughout the vehicle’s service life. As an ASA industrial compound, ASA supports both functional performance and visual stability in exposed parts.

Typical automotive ASA uses include:

Mirror housings
Exterior trims and covers
Grilles and body panels
Protective and decorative exterior components

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Typical Applications of ASA Compounds

Industrial and Consumer Applications

Beyond automotive, ASA compounds are widely applied in industrial and consumer products that require reliable outdoor performance. The combination of durable ASA plastic properties and design flexibility makes ASA a preferred material for long-term exterior use.

Typical applications include:

Outdoor housings and enclosures for electrical and electronic equipment
Construction profiles and extruded components
Consumer products exposed to weathering, such as garden equipment and outdoor furniture parts
Technical and industrial components requiring impact resistance and environmental stability

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ASA vs. ABS vs. PC: Material Comparison

ASA (Acrylonitrile Styrene Acrylate)

Key properties: Excellent UV stability, high weather resistance, good impact strength, long-term color retention
Main advantage: Maintains mechanical and visual properties in outdoor environments
Typical use: Automotive exterior parts, outdoor housings, profiles, consumer products exposed to sunlight

ABS (Acrylonitrile Butadiene Styrene)

Key properties: Good impact strength, easy processing, good surface finish
Main limitation: Poor UV and weather resistance without coatings or additives
Typical use: Interior automotive parts, electronics housings, appliances, consumer goods for indoor use

PC (Polycarbonate)

Key properties: Very high impact strength, high heat resistance, transparency (in unfilled grades)
Main limitation: Lower UV resistance unless stabilized; higher cost
Typical use: Safety components, glazing, lighting covers, electrical and high-performance industrial parts

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Typical Technical Properties of ASA Compounds

Property	Unit	Typical value
Impact Strength (Charpy, notched)	kJ/m²	15 – 35
Impact Strength (Izod, notched)	kJ/m²	10 – 30
Tensile Strength	MPa	40 – 55
Tensile Modulus	MPa	1,800 – 2,400
Elongation at Break	%	10 – 30
Vicat Softening Temperature (VST A50)	°C	95 – 105
Heat Deflection Temperature (HDT, 1.8 MPa)	°C	85 – 100
Melt Flow Index (MFI, 220 °C / 10 kg)	g/10 min	5 – 25
Density	g/cm³	1.05 – 1.08

Actual values depend on ASA resin type, compound formulation, and additive package. ASA industrial compounds can be tailored for higher impact strength, improved flow, or enhanced heat resistance depending on the application.