Catalyst for one- and two-component polyurethane coatings and «one-shot» polyurethane foams

  • Characteristic Data

    Metal contentSn: 28.0 – 29.3 % DIN 51008-2
    Non-volatile contentN/A
    Specific gravityN/A
    Density1.23 – 1.27 g/cm³ DIN 51757 (20 °C)

  • Features

    • Stabilized tin octoate with a metal content of approx. 28 % by weight, soluble in most organic solvent
    • Accelerates the reaction between the polyol and isocyanate component of polyurethane foam systems
    • Ensures fast blocking stability
    • Earlier solvent resistance and sanding capability
    • Higher film hardness
    • Enables control of the foaming characteristics resulting in more homogeneous foam with improved resistance to heat and oxidational degradation

  • Applications

    • Solvent-based one- and two-component polyurethane coating systems and heat-cured coatings
      • Automotive Refinish
      • General Industrial
      • Coil

  • Dosage

    For polyurethane coating systems, an addition rate of Borchi® Kat 28 between 0.01 and 0.03 % product, calculated on solid binder is recommended, depending on the used binder and formulation. The exact amount has to be determined in preliminary trials. Borchi® Kat 28 can be added to the polyol component of the coating system either in the supply form or diluted in a suitable solvent. Dissolved in organic solvents, Borchi® Kat 28 is only stable for a limited period of time. In polyurethane foam systems the recommended addition rate of Borchi® Kat 28 is between 0.05 and 0.20 % by wt. calculated on the total formulation depending on the kind of application. It must be determined in preliminary trials.

  • Storage

    Protect from the effects of weathering and store at temperatures between 5 and 30 °C. Once opened, containers should be resealed immediately after each removal of the product. After opening the drums, a short-time consumption of Borchi® Kat 28 is advisable. Although maximum stability is ensured by special product stabilization, the active tin content might be reduced if Borchi® Kat 28 is exposed to air or stored unsealed or in drums with low filling level.

  • Safety

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

Registration :
  • Europe : EINECS, EU - REACH (Registered)
  • Switzerland : EINECS
  • USA : TSCA
  • Canada : DSL
  • Australia : AICS
  • New Zealand : NZIoC
  • China : IECSC
  • Japan : ENCS
  • Korea : ECL
  • Taiwan : NECI
  • Philippines : PICCS