Highly reactive tin-free catalyst for one- and two-component polyurethane coatings

  • Physical Characteristics

    Metal contentBi: 20,00 – 22,00 % ISO 4619
    Non-volatile contentN/A
    ViscosityN/A
    Specific gravityN/A
    Density1.145 – 1.205 g/cm³ ISO 2811-1 (20 °C)

  • Features

    • 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
    • Higher film hardness
    • Earlier sanding of the coating

  • Applications

    • One- and two-component polyurethane clearcoats and pigmented coating systems
      • Automotive Refinish
      • General Industrial
      • Coil

  • Dosage

    Our experience has shown the recommended addition rate of Borchi® Kat 21 to be between 0.01 and 0.03 % product, calculated on total solid binder. The exact amount depends on the used resin and should be determined by means of preliminary trials. Borchi® Kat 21 can be added either in the supply form or diluted in any suitable solvent (e.g., butyl acetate) to the polyol component of the coating system. Borchi® Kat 21 should not be diluted below 10 % of the supply form, since those solutions are only stable for a limited period of time.

  • 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.

  • Safety

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

Registration :

For chemical inventory status, please review section 15 of the current SDS.

Click here to access the SDS portal.

For additional regulatory information, please contact [email protected].

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