Overview
Modified ASA is a specialized variant of acrylonitrile styrene acrylate (ASA) thermoplastic, engineered to overcome limitations of standard ASA, such as limited UV resistance and thermal stability. Through chemical modifications—often including additives like impact modifiers or UV absorbers—it achieves superior performance in harsh environments. It retains ASA’s inherent ease of processing (e.g., injection molding, extrusion) while offering extended service life for outdoor applications. Industries favor modified ASA for its balance of aesthetics and functionality. Unlike ABS, it does not degrade significantly under prolonged sunlight exposure, making it ideal for automotive trim, garden equipment, and architectural panels. Its formulation can be tailored to meet specific mechanical or color retention requirements.
Physical and Chemical Properties
Modified ASA exhibits a unique combination of properties due to its ternary copolymer structure. The acrylate component provides flexibility and weatherability, while styrene and acrylonitrile contribute rigidity and chemical resistance. Its tensile strength ranges from 40–50 MPa, with elongation at break of 20–40%, depending on modifiers. Key advantages include a low coefficient of thermal expansion (6–9 × 10−5/K) and flame-retardant grades (UL94 HB-V0). It resists alkalis, acids, and alcohols but may swell in ketones or esters. Unlike unmodified ASA, it maintains color stability after 1,000+ hours of QUV accelerated weathering testing, with minimal gloss loss.
Main Applications
The automotive sector accounts for ~40% of modified ASA use, particularly in mirror housings, grilles, and wheel covers, where gloss retention and impact resistance are critical. In construction, it replaces metals in window profiles, roofing membranes, and decorative trims due to its lightweight nature and resistance to hail damage. Consumer goods leverage its aesthetics for outdoor furniture, sports equipment, and electronic enclosures (e.g., solar inverter casings). Specialty grades with anti-static properties serve in cleanroom applications. Recent innovations include co-extruded sheets with PMMA for high-gloss surfaces without painting.
Safety and Storage
Modified ASA is classified as non-hazardous under GHS, though dust generated during machining may irritate respiratory systems. Processing temperatures should stay below 250°C to prevent decomposition fumes containing styrene and acrylonitrile. Storage requires protection from moisture (recommended RH <60%) to prevent hydrolysis. Pellets should be dried at 80–85°C for 2–4 hours before processing if exposed to humid conditions. Bulk containers must be sealed and stored away from oxidizers. Spills can be swept up without special precautions, but PPE (gloves, goggles) is advised for large-scale handling.
B2B Procurement Guide
Buyers should specify key parameters: UV stabilizer type (e.g., HALS for long-term outdoor use), impact modifier percentage (5–20% for toughness), and regulatory compliance (e.g., RoHS, REACH). For automotive parts, confirm OEM-approved grades like BMW’s TL-52426. Suppliers often provide custom compounding services—volume discounts typically apply at 20+ metric ton orders. Lead times vary from 4–8 weeks for standard grades to 12+ weeks for specialty formulations. Quality checks should include melt flow index (MFI) testing and accelerated weathering reports. Asian manufacturers dominate production, but regional stockists in the EU/USA offer shorter delivery times at a 10–15% premium.
Related Manufacturers
- 主营：聚烯烃、机械仪器、工业壳体、挤出级ASA、升级透明聚丙烯
- 主营：透红外abs、玻纤增强尼龙、玻纤阻燃pbt、改性塑料、耐候ASA、阻燃pcasa、改性pp、改性abs、阻燃pcabs、阻燃abs、增韧尼龙、滑石粉pp、矿物填充pp、抗静电abs、玻纤pp、高光pp、塑料原材料、原料abs、pp原料、pa塑料颗粒、abs塑料、免喷涂塑料、pmma、玻纤增强pa、玻纤增强as
- 主营：挤出级ASA、pc、pps、PTFE
- 主营：POM、PC、PA66、ASA、高胶粉、ABS
- 主营：改性塑料、改性ABS、改性PC、改性PP、塑料颗粒、PC/ABS合金、低voc材料
- 主营：eva-g-mah、abs-g-mah、ul40028cc、改性剂、ul02528cc、紫外线、瓶盖垫、poe-g-mah、聚丙烯、eva三井、热熔胶、粘合剂、abs自产、3mtf-9208、ul00728cc、eva自产、ptfe微粉、epdm-g-mah、ul04533eh2、hdpe-g-mah、poliskc211、3mtf-9207z、手感pp料、lldpe-g-mah、塑料耐热
- 主营：ASA加纤15、阻燃剂、pc阻燃剂、阻燃母粒
- 主营：塑胶粉末、(特种)工程塑料、热塑性弹性体、ASA粉、通用塑料
- 主营：气相二氧化硅、消光粉、丙烯酸树脂、蜡粉、炭黑、固化剂
- 主营：螺杆清洗料、螺杆清洗剂、抗菌母粒、抗静电母粒、防老化母粒、阻燃母粒、硅酮母粒、硅酮粉、增透母粒、增刚母粒、开口母粒、降解母粒、抗氧化母粒、消光母粒、哑光母粒、发泡剂、防雾剂、防锈母粒、香味母粒、脱模母粒、增韧母粒、耐寒母粒、微晶蜡、色母粒、填充母粒
- 主营：化妆瓶、汽車板、lgpc1201-10、流动透明、防火阻燃、红外透过、树脂光学、卤素阻燃、透明灯条、黑色注塑、树脂射出、汽车内饰、罗姆化学、透明树脂、透明白底、阻燃材料、耐老化耐候、高光免喷涂、高透明容器、pcl-1250ypanlite、高性能塑
- 主营：TPE颗粒、ABS颗粒、PP颗粒、ASA、PC/ABS合金材料、PC颗粒
- 主营：PC、ABS、POM、ASALI913、TPU、LCP、PCTG、POE、PEI、TPE、EVA、PBT、PC/ABS、PA66、PMMA、杜邦pom、杜邦pa66、美国杜邦、塑料颗粒、塑料原料
- 主营：PC、PBT、PA66、挤出级ASA、POM、POE、PC/ABS、PA6、EVA、PPS、PPA、PET、PBT/PET、PA6T、PA9T、PFA
- 主营：PP、PC、PBT、ASA、ABS、POM、EVA、PE、PA6、LDPE、TPEE、TPU、PA66、LLDPE、PA46、EAA、PPO、PMMA、PET