Description

Styrene Butylacrylate Copolymer is a synthetic polymer formed from the copolymerization of styrene and butyl acrylate monomers. This versatile material is engineered to deliver a unique balance of properties, including excellent film formation, adhesion, and weatherability, making it a critical component in high-performance formulations. It is essential for manufacturers in the coatings, adhesives, and construction industries seeking durable, flexible, and cost-effective polymer solutions.

Application

• Architectural and Industrial Coatings: Acts as a primary binder in water-based paints and varnishes, providing excellent gloss, durability, and resistance to yellowing.
• Adhesives and Sealants: Used in pressure-sensitive adhesives (PSAs), construction sealants, and laminating adhesives for its strong bonding and flexibility.
• Textile and Non-Woven Binders: Serves as a key component in fabric coatings and binders for non-woven materials, enhancing softness and wash resistance.
• Paper and Paperboard Coatings: Improves surface gloss, printability, and water resistance of coated papers and packaging materials.
• Leather Finishing: Employed in topcoat formulations to provide a protective, flexible, and aesthetically pleasing finish.
• Caulks and Joint Compounds: Imparts flexibility, crack resistance, and improved application properties in construction compounds.

Basic Information

Product Name	Styrene Butylacrylate Copolymer
CAS No.	67338-64-1
Molecular Formula	(C8H8)x(C7H12O2)y
Molecular Weight	Varies by monomer ratio and polymerization degree
Synonyms	Styrene-Butyl Acrylate Copolymer; Butyl Acrylate-Styrene Copolymer; Acrylic-Styrene Copolymer; SB Acrylic; Styrene/Acrylic Copolymer; Poly(Styrene-co-Butyl Acrylate); Acrylic Binder; CAS 67338-64-1
EINECS	Contact for details

Quality Control

Our Styrene Butylacrylate Copolymer is manufactured under a stringent quality management system. Each batch is tested to ensure consistent performance in key parameters such as solids content, viscosity, pH, glass transition temperature (Tg), and monomer residue. Certificates of Analysis (COA) documenting these specifications are provided with every shipment to guarantee compliance with your formulation requirements 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). Avoid exposure to extreme heat or freezing conditions to maintain product stability and prevent phase separation or viscosity changes.

Specification

Item	Specification
Appearance	Milky white emulsion
Solids Content	45 - 55 %
pH	7.0 - 9.0
Viscosity	500 - 3000 cps
Glass Transition Temperature (Tg)	-10°C to +30°C
Particle Size	< 0.5 µm
Residual Monomer	< 500 ppm

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