Description

Styrene Maleic Anhydride Copolymer is a synthetic polymer formed from the copolymerization of styrene and maleic anhydride, known for its excellent thermal stability, film-forming properties, and reactivity. This versatile material serves as a crucial performance additive, compatibilizer, and reactive intermediate in numerous industrial formulations. It is essential for manufacturers in the coatings, adhesives, plastics modification, and specialty chemical industries seeking to enhance product durability, adhesion, and functionality.

Application

• Coatings & Inks: Used as a film-forming agent, dispersant, and rheology modifier to improve gloss, adhesion, and scratch resistance in industrial and decorative coatings.
• Adhesives & Sealants: Acts as a tackifier and reinforcing agent, enhancing bond strength and thermal stability in pressure-sensitive and structural adhesives.
• Plastics & Polymer Modification: Functions as a compatibilizer and impact modifier in polymer blends (e.g., with polyamides, polyesters) and as a precursor for engineering plastics.
• Paper Sizing & Treatment: Employed in surface sizing to improve paper strength, printability, and water resistance.
• Textile Finishing: Utilized as a binder and finishing agent to impart wrinkle resistance and durable press properties to fabrics.
• Oilfield Chemicals: Serves as a fluid loss additive and viscosity control agent in drilling mud formulations.
• Pharmaceutical & Cosmetic Excipients: Used in controlled-release drug delivery systems and as a stabilizer or thickener in cosmetic products.
• Water Treatment: Acts as a scale inhibitor and dispersant in industrial water treatment processes.

Basic Information

Product Name	Styrene Maleic Anhydride Copolymer
CAS No.	31959-78-1
Molecular Formula	(C8H8·C4H2O3)n
Molecular Weight	Varies (Polymer)
Synonyms	Styrene-Maleic Anhydride Resin; SMA Copolymer; Maleic Anhydride-Styrene Copolymer; Poly(Styrene-alt-Maleic Anhydride); SMA Resin; SMAnh; Styrol Maleic Anhydride Copolymer; 2,5-Furandione, polymer with ethenylbenzene
EINECS	Contact for details

Quality Control

Our Styrene Maleic Anhydride Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent performance, including measurement of molecular weight, acid value, maleic anhydride content, and thermal properties. Certificates of Analysis (COA) documenting key specifications are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent moisture absorption, which can affect product performance. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Complies
Maleic Anhydride Content	Varies by grade (Typical range: 10-50%)
Acid Value	Varies by grade
Molecular Weight (Mw)	Varies by grade (e.g., 1,500 - 10,000 g/mol)
Glass Transition Temperature (Tg)	Varies by grade
Moisture Content	< 1.0%
Residue on Ignition	< 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.