Dipropylene Glycol Methyl Ether Acetate (DPMA), identified by CAS number 88917-22-0, is a high-boiling, slow-evaporating glycol ether acetate characterized by its exceptional solvency and low volatility. As a prominent member of the P-series glycol ether family, it serves as a technically superior and toxicologically safer alternative to many ethylene oxide-based (E-series) solvents. DPMA is a clear, colorless liquid with a mild, non-intrusive ether-like odor, making it highly desirable for applications where worker comfort and sensory impact are critical.
Chemically, DPMA combines the functional properties of an ether and an ester, resulting in a hydrophobic character that facilitates the efficient dissolution of various synthetic resins, including acrylics, epoxies, polyurethanes, and alkyds. Its primary industrial utility lies in its role as a “tail solvent” and coalescing agent. It is specifically engineered to enhance film formation, improve flow and leveling, and prevent surface defects such as blushing or orange peel in high-performance coating systems.
**Superior Solvency:** Exhibits strong dissolving power for a wide range of resin systems, including nitrocellulose, acrylic, epoxy, and polyester.
**Low Volatility:** An extremely slow evaporation rate ensures prolonged “open time,” allowing for optimal leveling and a high-gloss finish.
**Hydrophobic Profile:** Reduced water solubility compared to standard glycol ethers makes it ideal for moisture-sensitive formulations.
**Improved Safety:** As a P-series solvent, it offers a significantly lower toxicity profile and lower vapor pressure than E-series counterparts.
**Viscosity Control:** Effectively reduces the viscosity of high-solids formulations, improving sprayability and application consistency.
**Mild Odor:** Facilitates use in confined industrial spaces and indoor architectural applications.
**Molecular Formula:** $C_9H_{18}O_4$
**Boiling Point:** Approximately $209^circtext{C}$ ($408^circtext{F}$) at 760 mmHg.
**Flash Point:** $86^circtext{C}$ ($187^circtext{F}$) (Setaflash Closed Cup), classifying it as a combustible liquid rather than highly flammable.
**Evaporation Rate:** 0.015 (n-Butyl Acetate = 1), categorizing it as a very slow-evaporating solvent.
**Vapor Pressure:** $0.08text{ mmHg}$ at $20^circtext{C}$, contributing to low VOC emissions in specific regulatory frameworks.
**Specific Gravity:** $0.976$ at $20^circtext{C}$.
**Solubility:** Limited solubility in water (approx. 7% at $20^circtext{C}$); fully miscible with most organic solvents.
• Electrical and electronics
• Connectors, switches, PCB housings, terminal blocks
• Automotive
• Under-hood components, interior assemblies, cable conduits
• Wire and cable
• Insulation layers, sheathing, jacketing materials
• Construction
• Plastic fittings, conduits, insulation panels
• Consumer appliances
• Enclosures, adapters, plugs, casings
• Industrial components
• Fiber-reinforced composites, flame-retardant masterbatches
• Compatible polymers
• PA6, PA66
• PBT, PET
• PE, PP
• Blends and copolymers requiring halogen-free flame retardancy
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