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DOWANOL™ PnB
DOWANOL™ PnB is a fast evaporating glycol ether solvent from Dow Chemicals. It is based on propylene glycol mono butyl ether and provides high solvency and excellent hydrophobic coupling properties.
DOWANOL™ PnB is a propylene glycol mono butyl ether-based solvent from Dow that offers relatively fast evaporation, hydrophobicity, high solvency, and improved coalescing properties to a variety of formulations. DOWANOL™ PnB glycol ether is widely used in heavy-duty cleaning products and formulations due to its excellent solvency and coupling of hydrophobic oils and in greases in cleaning formulations. It is partially soluble in water and completely miscible with organic solvents.
PnB glycol ether is also used to lower the surface tension of cleaning products alone or combined with other glycol solvents. DOWANOL™ PnB also offers good coalescing properties to coating systems when fast evaporation is required. DOWANOL™ PnB offers a combination of high solvency, surface tension lowering ability, and slow evaporation, making it a universal solution for use in a broad array of applications.
Specifications
Appearance: Colorless liquid Odor: Ether Freezing point: < -80 °C (-112 °F) Boiling point (760 mmHg): 171 °C (340 °F) at 1,013 hPa Flash point: Closed cup 62.5 °C (144.5 °F) at 721.0343 hPa ASTM D3278 Relative Vapor Density (air = 1): 4.6 Relative Density (water = 1): 0.878 at 25 °C (77 °F) / 25 °C ASTM D891 Water solubility: 52 g/L at 20 °C (68 °F) Partition coefficient: n-octanol/water: log Pow 1.2 (Measured) Auto-ignition temperature:260°C (500 °F) Kinematic Viscosity: 3.85 mm2/s at 20 °C (68 °F) Molecular weight:132.2 g/mol (Calculated) Chemistry: Propylene glycol n-butyl ether
Primary Chemistry: Propylene glycol n-butyl ether
Features & Benefits
Fast evaporating glycol ether solvent Hydrophobic glycol ether with high solvency Ability to reduce surface tension alone or combined with other ingredients Compatible with various resin types and cleaning formulation ingredients, including surfactants Excellent coupling and coalescing properties in systems requiring fast evaporation
Problems Solved
Difficulties coupling hydrophobic greases and oils in household and industrial formulations Slow evaporating rate of solvents in cleaning formulations
Applications
Coupling agent and solvent in household and industrial cleaners, grease and paint removers, metal cleaners, and hard surface cleaners Effective coalescent for lowering minimum film formation temperature MFFT) in water-borne latex coatings Solvent and wetting additive for solvent-based coatings Chemical intermediate in the production of epoxides, acid ester derivatives, solvents, and plasticizers Coupling agents and solvents for use in water-based agriculture formulations
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