Overview
Styrene-acrylic solid resin is a copolymer synthesized from styrene and acrylic monomers through solution or emulsion polymerization. It combines the hardness and cost-effectiveness of styrene with the flexibility and weather resistance of acrylic components. This thermoplastic resin is favored in industrial applications due to its balanced properties and ease of processing. Manufacturers typically supply it in flake or powder form for convenient handling and dissolution in appropriate solvents.
Physical and Chemical Properties
The resin exhibits a glass transition temperature (Tg) ranging from 40°C to 80°C, depending on the monomer ratio. Its molecular weight typically falls between 10,000-50,000 g/mol, influencing solution viscosity and film hardness. Key characteristics include excellent pigment wetting ability and compatibility with most coating additives. The resin demonstrates good resistance to alkalis and mild acids, though prolonged exposure to strong solvents may cause swelling or partial dissolution.
Main Applications
In the coatings industry, this resin serves as a primary binder for architectural paints, industrial finishes, and wood coatings due to its durability and color retention. The ink sector utilizes it for gravure and flexographic inks requiring quick solvent release. Adhesive manufacturers employ styrene-acrylic resins in pressure-sensitive and laminating adhesives. Recent developments include its use in road marking paints and concrete sealers where weather resistance is critical.
Safety and Storage
While classified as non-hazardous in solid form, dust generation during handling requires appropriate respiratory protection. The material should be stored in original packaging at temperatures below 30°C to prevent caking. Spills should be collected using non-sparking tools and disposed of according to local regulations. Thermal decomposition above 200°C may release styrene monomer, necessitating proper fume extraction systems in processing environments.
B2B Procurement Guide
Industrial buyers should specify parameters including acid value (typically 5-20 mg KOH/g), viscosity (measured at 40% solids in xylene), and softening point when ordering. Bulk purchases (500kg+) often attract 5-10% discounts. Quality verification should include tests for residual monomer content (<0.5%) and color stability. Leading manufacturers are concentrated in China, Germany, and the United States, with MOQs ranging from 100kg to full container loads depending on supplier capabilities.
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