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Isopropanol (IPA, Dilution Solvent for Flexo Ink)

CAS Number: 67-63-0

High-purity isopropanol (IPA, 2-propanol) used as a co-solvent and dilution solvent in flexographic inks based on nitrocellulose and polyamide resins, replacing ethanol or blending with esters to optimize evaporation rate, viscosity, and substrate wetting. IPA is also widely used in offset printing as a damping solution alcohol replacement and in press cleaning, as well as a surface tension modifier in waterborne digital inks.

Technical Specifications

appearanceClear colorless liquid
purity (%)≥99.7
water content (%)≤0.1
boiling point (°C)82–83
density (g/mL, 20 °C)0.784–0.786

Applications

  • Co-solvent in NC/PA flexographic ink formulations
  • Dilution solvent for press-side viscosity adjustment
  • Offset damping solution alcohol component
  • Press and roller cleaning solvent in printing plants
  • Surface tension modifier in waterborne digital inks

Key Features

  • Excellent co-solvent compatibility with ethyl acetate and n-propyl acetate
  • Adjustable evaporation rate for flexo press conditions
  • Good substrate wetting on treated BOPP and PET films
  • Low residual odor in dried flexo ink films for food packaging compliance

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Isopropanol (IPA, Dilution Solvent for Flexo Ink) chemical structure

CAS Number

67-63-0

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