Highly reactive tin-free catalyst for one- and two-component polyurethane systems and RTV silicones


  • Characteristic Data

    Metal contentBi: 15.80 – 16.20 %Bi, ISO 4619
    Non-volatile content50.0 – 60.0 %ISO 3251 (2g, 3h, 105°C)
    ViscosityMax. 2500 mPa.s20°C, ISO 3219
    Density1.080 – 1.120 g/cm³20°C, DIN 51757

  • Properties

    • Accelerates solvent-based or solvent-free one- and two-component
      polyurethane systems and stoving enamels based on blocked isocyanates
    • Ensures fast blocking stability of polyurethane coatings
    • Provides increased film hardness, earlier solvent resistance and allows earlier sanding of the applied coating
    • Ecologically safe replacement for other polyurethane catalysts, especially for amines and tin-based products like DBTL
    • Can be used as a tin replacement

  • Applications

    • Coatings
      • Automotive refinish
      • General industrial
      • Coil

  • Dosage

    The recommended addition rate of Borchi® Kat 315 EU in polyurethane coatings is according to our experience between 0.01 and 0.03% product, calculated on solid binder. The exact amount depends on the used binder and should be determined by means of preliminary trials.

    The optimal addition rate of Borchi® Kat 315 EU in PU foams and RTV silicone resins is depending on the reactive components and should as well be determined by means of preliminary trials.

    Borchi® Kat 315 EU can be added either in the supply form or diluted (e.g. in butyl acetate) to the polyol component of the coating System. Borchi® Kat 315 EU 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 :
  • Europe : EINECS, EU - REACH (Registered)
  • Switzerland : EINECS
  • USA : TSCA
  • Canada : DSL
  • Australia : AICS
  • New Zealand : NZIoC
  • China : IECSC
  • Japan : Allowed under specific conditions. Please contact us for further information.
  • Korea : ECL
  • Taiwan : NECI
  • Philippines : PICCS