Description

Poly(Styrene-Co-Methyl Methacrylate) is a high-performance copolymer engineered by combining the rigidity and processability of polystyrene with the weatherability and optical clarity of poly(methyl methacrylate). This material offers a unique balance of properties, making it a versatile solution for applications requiring specific mechanical strength, thermal stability, and aesthetic qualities. It is essential for manufacturers in the plastics, coatings, and specialty polymer industries seeking to fine-tune material characteristics for demanding end-use environments.

Application

• Impact Modifiers & Compatibilizers: Used to improve the toughness and impact resistance of brittle polymer matrices, such as in PVC blends or engineering plastics.
• Optical Films and Light Guides: Utilized in display technologies and lighting applications due to its good light transmission and clarity.
• Protective and Decorative Coatings: Serves as a key resin in formulations for durable, weather-resistant, and glossy surface finishes.
• Adhesives and Sealants: Acts as a base polymer providing strong adhesion and cohesive strength in industrial adhesive systems.
• Toners and Printing Inks: Employed as a binder resin to control fusing properties, charge characteristics, and image quality in electrophotographic processes.
• Medical Device Components: Suitable for non-implantable medical parts requiring clarity, rigidity, and gamma radiation stability.
• Automotive Interiors: Used in components like trim, knobs, and light housings where a combination of aesthetics, durability, and dimensional stability is needed.
• Polymer Blends and Alloys: Functions as a critical component to modify the glass transition temperature, rheology, and mechanical properties of custom polymer formulations.

Basic Information

Product Name	Poly(Styrene-Co-Methyl Methacrylate)
CAS No.	25034-86-0
Molecular Formula	(C8H8.C5H8O2)n
Molecular Weight	Varies by grade and composition
Synonyms	Styrene Methyl Methacrylate Copolymer; SMA Copolymer; Poly(styrene-co-MMA); PS-co-PMMA; Styrene/MMA Copolymer; Methyl Methacrylate Styrene Copolymer; Acrylic Modified Polystyrene; Transparent Impact Polystyrene; MS Resin; CAS 25034-86-0
EINECS	Contact for details

Quality Control

Our Poly(Styrene-Co-Methyl Methacrylate) is manufactured under a stringent quality management system. Each batch is subjected to rigorous analytical testing to ensure consistent composition, molecular weight distribution, and performance properties. Certificates of Analysis (COA) detailing key parameters such as monomer ratio, residual monomer content, glass transition temperature (Tg), and melt flow index are available upon request to support your quality assurance protocols.

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). Keep away from heat sources and open flames. Under these conditions, the product is stable for extended periods.

Specification

Item	Specification
Appearance	White to off-white beads or powder
Identification (IR)	Complies
Styrene Content	40 - 80% (Typical, customizable)
Glass Transition Temperature (Tg)	80 - 110 °C (Dependent on composition)
Residual Monomer	< 0.5%
Melt Flow Rate (MFR)	1 - 30 g/10 min (230°C/3.8kg)
Moisture Content	< 0.5%

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