Overview
Dow CAC (Cellosize Acetate) is a cellulose derivative produced by Dow Chemical Company, widely recognized for its versatility in industrial applications. It is synthesized through the acetylation of ethylcellulose, resulting in a compound with enhanced solubility in organic solvents and superior film-forming properties. As a non-toxic and thermoplastic material, it is a preferred choice in sectors requiring high-performance binders or coatings. Primarily supplied as a white powder or granules, Dow CAC is compatible with a range of solvents, including acetone and ethanol. Its stability under varying temperatures and resistance to chemicals make it suitable for demanding environments. The product is often customized for specific industry needs, such as adjusting viscosity or solubility profiles.
Physical and Chemical Properties
Dow CAC exhibits a density range of 1.07–1.18 g/cm³, reflecting its lightweight yet durable nature. Unlike many polymers, it decomposes before reaching a melting point, which necessitates careful processing at temperatures below 200°C. Its solubility in organic solvents like acetone and ethanol allows for easy integration into formulations, while its insolubility in water ensures stability in humid conditions. Key chemical properties include high thermoplasticity and resistance to oils, greases, and mild acids. These traits make it ideal for coatings requiring durability and flexibility. The molecular weight (approximately 654.6 g/mol) and acetyl content can be tailored to meet specific application requirements, such as adhesion strength or drying time.
Main Applications
Dow CAC is extensively used in the adhesives industry, where it acts as a binder for wood, paper, and fabric adhesives due to its strong film-forming ability. In coatings, it provides a protective layer for metals and plastics, offering resistance to abrasion and chemicals. The textile industry employs it as a sizing agent to strengthen fibers during weaving. Other notable applications include pharmaceutical tablet coatings, where its non-toxicity and solubility in ethanol are advantageous, and printing inks, where it enhances pigment dispersion and print quality. Its versatility also extends to specialty films and membranes, particularly in packaging and filtration systems.
Safety and Storage
While Dow CAC is generally non-toxic, precautions are necessary to avoid inhalation of dust or prolonged skin contact, which may cause mild irritation. Use gloves, goggles, and masks during handling. Ensure adequate ventilation in workspaces to minimize airborne particles. Storage recommendations include keeping the material in tightly sealed containers away from moisture and extreme temperatures. Exposure to humidity can lead to clumping or reduced solubility. Shelf life typically exceeds two years when stored under optimal conditions. Dispose of waste in compliance with local environmental regulations, as it is not biodegradable.
B2B Procurement Guide
When procuring Dow CAC, prioritize suppliers with certifications like ISO 9001 to ensure quality consistency. Request technical datasheets detailing viscosity, acetyl content, and solubility to match your application needs. Bulk purchases (e.g., 500 kg or more) often reduce costs, but verify storage capacity to prevent degradation. Consider regional logistics: Dow CAC is produced in major chemical hubs like the U.S. and Europe, so factor in shipping lead times and tariffs. For customized grades (e.g., low-viscosity variants), collaborate with suppliers to confirm production feasibility. Sample testing is advisable to validate performance before large-scale orders.
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