Acetates & Esters, High-Purity Solvents

Mixed-Butyl Acetate(MBAC)

Mixed-Butyl Acetate (MBAC) is a high-performance ester solvent primarily composed of a synergistic blend of n-butyl acetate and isobutyl acetate isomers. This clear, colorless liquid is characterized by its characteristic fruity odor and serves as a versatile, medium-boiling oxygenated solvent. In the industrial chemical landscape, MBAC is prized for its ability to bridge the gap between fast-evaporating solvents and slow-evaporating retarders. It exhibits excellent solvency power for a diverse array of natural and synthetic resins, including nitrocellulose, acrylics, epoxies, and alkyds. Due to its balanced evaporation profile and low toxicity relative to aromatic hydrocarbons, MBAC is a staple in the formulation of high-quality coatings, lacquers, and thinners. Its chemical stability and hydrophobic nature make it particularly valuable in moisture-sensitive applications, such as polyurethane systems, where it aids in achieving superior film integrity, leveling, and gloss.

Attributes

Key Features and Benefits

*Superior Solvency:** Demonstrates high efficiency in dissolving various polymers, including cellulose acetate butyrate (CAB) and ethyl cellulose.
*Optimized Evaporation:** Offers a balanced drying rate that prevents common coating defects such as “blushing,” “pinholing,” or “orange peel.”
*High Purity & Low Moisture:** Typically refined to contain minimal water content, making it safe for use in NCO-reactive polyurethane coatings.
*Enhanced Aesthetics:** Promotes excellent flow and leveling, resulting in high-gloss, smooth finishes in automotive and decorative applications.
*Favorable Safety Profile:** Presents a lower health risk and milder odor compared to ketones or traditional aromatic solvents like Xylene.
*Environmental Compliance:** Helps formulators meet VOC regulations by acting as an effective alternative to more hazardous air pollutants (HAPs).

Specifications

Technical Highlights

*Chemical Identity:** A strategic mixture primarily involving n-Butyl Acetate (CAS No. 123-86-4) and Isobutyl Acetate (CAS No. 110-19-0).
*Boiling Range:** Maintains a stable distillation range typically between 110°C and 127°C at atmospheric pressure.
*Specific Gravity:** Ranges from 0.870 to 0.885 at 20°C, providing consistent volumetric dosing in manufacturing.
*Flash Point:** Typically falls between 22°C and 28°C (closed cup), requiring standard flammable liquid handling protocols.
*Hansen Solubility Parameters:** Features a balanced dispersion force (δD), polar force (δP), and hydrogen bonding (δH) profile for broad resin compatibility.
*Refractive Index:** Approximately 1.390–1.395, reflecting high chemical consistency and purity.

Download Technical Data Sheet (TDS)

Practical industry uses

Applications

*Automotive Coatings:** Widely used in OEM and refinish topcoats to ensure uniform pigment distribution and surface smoothness.
*Wood Finishes:** A critical component in nitrocellulose lacquers and acid-cured varnishes for high-end furniture and cabinetry.
*Printing Inks:** Utilized in gravure and flexographic ink formulations to control drying speeds on various substrates.
*Leather Treatments:** Applied as a carrier solvent in leather tannins and surface finishes to improve penetration and color uniformity.
*Adhesives:** Acts as a viscosity modifier in solvent-based contact adhesives and specialized structural bonding agents.
*Specialty Cleaners:** Employed in precision degreasing and electronic component cleaning due to its ability to dissolve oils without damaging sensitive plastics.