N-Butyl Acetate (NBAC/BTAC), with the chemical formula $CH_3COOC_4H_9$, is a premium medium-boiling ester solvent that serves as a cornerstone in the global chemical and coatings industries. It is a clear, colorless liquid characterized by a pleasant, fruity odor reminiscent of bananas. Produced via the esterification of n-butanol and acetic acid, NBAC is highly valued for its “standard” evaporation rate, which serves as a benchmark (1.0) for measuring the volatility of other organic solvents.
Technically, it bridges the gap between fast-evaporating solvents like acetone and slow-evaporating glycol ethers. It possesses excellent solvency for a broad spectrum of resins, including cellulose nitrate, polyurethanes, acrylics, and various gums. From a safety and regulatory perspective, NBAC is favored because it is not classified as a Hazardous Air Pollutant (HAP) in many jurisdictions and exhibits lower toxicity compared to many ketones or aromatic hydrocarbons, making it a preferred choice for high-performance industrial applications.
* Fast evaporation rate for quick drying applications.
* Excellent solvency for a wide range of resins and polymers.
* Enhances flow and leveling, resulting in smooth finishes.
* High flash point contributes to safer handling and storage.
* Possesses a mild, characteristic ester odor.
* Provides excellent blush resistance for clear coatings and lacquers.
* Versatile solvent used in diverse applications like coatings, inks, and adhesives.
* Miscible with most common organic solvents for broad formulation flexibility.
* Purity (Wt %): 99.5 Min.
* Water (Wt %): 0.05 Max.
* Acidity (as Acetic Acid, Wt %): 0.01 Max.
* Specific Gravity @ 20°C: 0.880 – 0.885
* Color (APHA): 10 Max.
* Distillation Range (oC): 124.0 – 128.0
* Flash Point (oC): 27
* Density (g/cm3 @ 20°C): 0.881
* Boiling Point (oC): 126
* Refractive Index (@ 20°C): 1.3940
* **Serves as an excellent solvent** for a wide array of resins like cellulose nitrate, acrylics, and alkyds, crucial for manufacturing coatings, lacquers, adhesives, and inks.
* **Acts as an active solvent** in the formulation of thinners, enhancing the performance of paints, lacquers, and varnishes.
* **Functions as a coalescing agent** in water-based paints and coatings, aiding in film formation and improving paint durability.
* **Utilized as a carrier solvent** in herbicide formulations and as a key ingredient in both industrial and household cleaning products.
* **Employed as an extractant** in various chemical processes and as an intermediate solvent in pharmaceutical manufacturing.
* **Included as a component** in perfumes and fragrances, and used as a flavoring agent in the food industry.
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