September 2, 2026, Zhengzhou – Alfa Chemical, a leading China-based specialty chemical manufacturer, has announced the expansion of its production capacity for Styrene Maleic Anhydride Copolymer (SMA, CAS 9011-13-6). This capacity expansion is designed to address the increasing global demand for high-performance functional polymers, particularly in the fields of polymer modification, nano-dispersants, and high-temperature resins.
SMA is a functional polymer featuring alternating or random styrene and maleic anhydride repeating units. Its reactive anhydride groups enable crosslinking, grafting, and derivatization for a wide range of applications. The product exhibits glass transition temperatures (Tg) ranging from 125°C to 155°C, depending on the grade and the styrene/maleic anhydride ratio.
Alfa Chemical offers multiple standard grades to meet diverse application requirements, including SMA-1000, SMA-2000, SMA-3000, and the SMA-4000 series (including SMA-1440 and SMA-17352). In addition, esterified grades SMA540 and SMA550 are also available for applications requiring specific degrees of esterification.
Key application areas for SMA include:
- Polymer Modification: Used as a compatibilizer and modifier for engineering plastics (ABS, PC, PA, PBT), improving impact resistance, heat resistance, and interfacial adhesion in polymer blends.
- Nano-Dispersant: Functions as a dispersant for nanoparticles, carbon nanotubes, and graphene in organic solvents. The anhydride groups provide strong anchoring to particle surfaces, enabling stable dispersion.
- Surface Treatment: Applied as a surface modifier for glass fibers, carbon fibers, and mineral fillers, enhancing interfacial adhesion between inorganic fillers and polymer matrices.
- Coating & Ink Additives: Improves adhesion, hardness, and chemical resistance in coatings and printing inks, suitable for high-performance industrial and automotive applications.
- High-Temperature Resin: Formulated into heat-resistant resins for electronic encapsulation, adhesives, and composite materials.
Alfa Chemical operates a dedicated R&D center and manufacturing facility staffed by an experienced team of polymer chemists. Every batch of SMA copolymer is manufactured under documented SOPs and validated to ensure molecular weight, acid value, and Tg meet specifications. Each shipment is accompanied by a Certificate of Analysis (COA) showing actual acid value, molecular weight, Tg, and other quality parameters.
SMA products from Alfa Chemical are packaged in 25kg bags, with custom packaging options available upon request. Sample quantities can be shipped via international courier, while bulk orders are handled by air freight or sea freight. Delivery time is 3-7 business days after payment confirmation.
With over 15 years of experience in specialty polymers and functional resins, Alfa Chemical is committed to delivering consistent quality, competitive pricing, and a reliable supply chain to customers worldwide. For more information or to request samples, please contact us via the online contact-us or email info@alfachem.cn.
About Alfa Chemical
Alfa Chemical is a China-based manufacturer specializing in industrial chemicals and specialty polymers, with over 15 years of R&D and production experience. The company is committed to providing high-quality Styrene Maleic Anhydride Copolymer (SMA) and related products to customers worldwide.