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Dowanol DPnP

• DOWANOL™ DPnP Glycol Ether (Dipropylene Glycol n-Propyl Ether) is a slow-evaporating glycol ether produced by The Dow Chemical Company. Here is a detailed overview of the product based on the provided information:

  Product Overview:

  • Product Name: DOWANOL™ DPnP Glycol Ether
  • Chemical Formula: C3H7O[CH2(CH)CH3O]2H (Major isomer)
  • CAS Number: 29911-27-1

  Description:

  DOWANOL™ DPnP is characterized by a slower evaporation rate compared to DOWANOL™ PnP glycol ether and is slightly more hydrophobic. It has a mid-range balance between hydrophobic and hydrophilic properties and offers significant water solubility. It is highly effective as a coalescent in coatings, providing excellent film properties and compatibility with hydrophobic materials.

  Physical Properties:

  • Molecular Weight: 176.2 g/mol
  • Boiling Point: 213°C (415°F)
  • Flash Point (Setaflash Closed Cup): 88°C (190°F)
  • Freezing Point: <-75°C (<-103°F)
  • Vapor Pressure at 20°C: 0.08 mmHg (0.11 mbar)
  • Specific Gravity (25/25°C): 0.919
  • Density:
    • @ 20°C: 0.921 g/cm³ (7.68 lb/gal)
    • @ 25°C: 0.916 g/cm³ (7.65 lb/gal)
  • Viscosity at 25°C: 11.4 cP (mPa•s)
  • Surface Tension at 25°C: 27.8 dynes/cm (mN/m)
  • Specific Heat at 25°C: 1.94 J/g/°C
  • Heat of Vaporization at Normal Boiling Point: 265 J/g
  • Net Heat of Combustion at 25°C: 29.7 kJ/g
  • Autoignition Temperature: 205°C (401°F)
  • Evaporation Rate:
    • n-Butyl Acetate = 1.0: 0.014
    • Diethyl Ether = 1.0: 903
  • Solubility at 25°C:
    • Solvent in Water: 17.2 g/100 g (15 wt%)
    • Water in Solvent: 22.5 g/100 g (18.5 wt%)

  Hansen Solubility Parameters:

  • Dispersion (d): 15.0 (J/cm³)^(1/2)
  • Polar (p): 3 (J/cm³)^(1/2)
  • Hydrogen Bonding (h): 9.6 (J/cm³)^(1/2)

  Flammable Limits (Vol.% in Air):

  • Lower: 0.68%

  Applications:

  • Coalescent for Water-Borne Latex Coatings: Enhances film formation and performance.
  • Active Solvent for Solvent-Borne Coatings: Provides good solvency and compatibility with various materials.

  Features:

  • Colorless
  • Low odor
  • Moderately soluble in water (19 ml/100 ml)
  • Good chemical stability
  • Excellent solvent properties
  • Efficient surface tension reduction
  • Low toxicity
  • Wide range of applications