Tin-free catalyst for solvent-based two-component polyurethane coatings

  • Physical Characteristics

    Metal contentN/A
    Non-volatile content60 – 75 % ISO 3251
    (2g, 3 h, 105 °C)
    ViscosityMax. 1000 mPa·s
    ISO 3219 (A) (20
    °C)
    Specific gravityN/A
    Density0.98 – 1.02 g/cm³
    DIN 51757 (20 °C)

  • Features

    • Non-hazardous replacement for other polyurethane
      catalysts, especially for tertiary amines and DBTL
    • Accelerates the chemical reaction between the alcohol and
      isocyanate component of polyurethane coating systems,
      thus allowing optimum steering of the drying properties
    • Ensures fast blocking stability
    • Reduced yellowing
    • Higher film hardness

  • Applications

    • Solvent-based two-component polyurethane clear coats
      • Automotive refinish

  • Dosage

    Our experience has shown the recommended addition rate of Borchi® Kat 0243 to be between 0.02 and 0.06 % product,
    calculated on solid binder. The exact amount depends on the used binder and should be determined by means of
    preliminary trials. Borchi® Kat 0243 can be added as supplied or solved in any suitable solvent (e.g. 10 % in xylene) to the
    polyol component of the coating system. The solution has to be homogenized by stirring. Borchi® Kat 0243 is also soluble in
    polar solvents and solvents of medium polarity. However, these solutions are only stable for a limited period of time.

  • Storage

    Protect from the effects of weathering and store at temperatures below 50 °C. Once opened, containers should be resealed immediately after each removal of the product.

  • Safety

    Please refer to our safety data sheet for information relating to product safety.