Description

Styrene-Methacrylate Copolymer is a synthetic polymer engineered from styrene and methacrylate monomers, creating a versatile material with a balanced profile of clarity, rigidity, and processability. This copolymer is valued for its excellent optical properties, chemical resistance, and ability to be tailored for specific performance requirements. It serves as a critical component for formulators and manufacturers in the coatings, adhesives, plastics, and specialty chemical industries seeking to enhance product durability and functionality.

Application

• Industrial and Protective Coatings: Used as a film-forming agent and binder to improve gloss, weather resistance, and hardness in automotive, appliance, and metal coatings.
• Adhesives and Sealants: Acts as a key polymer base providing strong adhesion, cohesion, and flexibility in pressure-sensitive adhesives, construction sealants, and laminating agents.
• Plastics Modification and Compounding: Employed as an impact modifier or processing aid to enhance the toughness, clarity, and flow characteristics of engineering plastics and blends.
• Printing Inks: Serves as a resin component to promote pigment wetting, print fidelity, and surface adhesion in various ink formulations.
• Personal Care Products: Utilized in hair sprays, nail polishes, and other cosmetics as a film-forming polymer to provide hold, water resistance, and a smooth finish.
• Textile and Leather Finishes: Applied in coatings to impart water repellency, stiffness, or a desired surface texture to fabrics and leather goods.

Basic Information

Product Name	Styrene-Methacrylate Copolymer
CAS No.	30870-67-8
Molecular Formula	(C8H8•C5H8O2)n
Molecular Weight	Varies (Polymer)
Synonyms	Styrene Methyl Methacrylate Copolymer; Methacrylate-Styrene Copolymer; SMA Copolymer; Poly(Styrene-co-Methyl Methacrylate); MS Copolymer; Styrene/MMA Copolymer; Acrylic-Styrene Copolymer; 2-Propenoic acid, 2-methyl-, methyl ester, polymer with ethenylbenzene
EINECS	Contact for details

Quality Control

Our Styrene-Methacrylate Copolymer is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent composition, molecular weight distribution, and performance characteristics. Certificates of Analysis (COA) detailing key parameters such as monomer ratio, residual monomer content, viscosity, and glass transition temperature (Tg) are provided to guarantee compliance with your specifications and industry standards.

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 strong oxidizing agents and heat sources to maintain product stability.

Specification

Item	Specification
Appearance	White to off-white beads or powder
Identification (IR)	Conforms
Assay (Copolymer Content)	≥ 98.0%
Residual Monomer (Styrene)	≤ 0.1%
Residual Monomer (MMA)	≤ 0.1%
Glass Transition Temperature (Tg)	85 - 105 °C (Typical)
Viscosity (Solution)	As per grade
Moisture Content	≤ 1.0%

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