SILCO Levelling, Wetting and Dispersing Additives

The SILCO product portfolio offers levelling and wetting additives for printing inks, overprint varnishes and versatile coatings as well as high-performance dispersing additives for pigment preparations.

      Levelling and surface additives

      In order to achieve a homogeneous and defect-free coating, a large number of factors and influencing variables must be taken into account.

      After the application of water-based coating systems, currents and concentration differences often occur in the paint during drying. This can lead to the undesirable formation of a scar structure, comparable to a so-called orange peel, on the surface. Changes in density, temperature and surface tension are the decisive parameters of this effect.

      This effect can be specifically counteracted by adding suitable levelling and surface additives. In addition to optimizing the flow, various surface properties can be adjusted with specifically modified additives:

      The result:

      • Recoatability
      • Surface smoothness and slip
      • Anti-stick properties
      • Anti-graffiti effect
      • Scratch resistance

      Substrate wetting agents

      Substrate wetting agents provide excellent wetting of surfaces. A coating system achieves optimal results when the surface tension of the coating is lower than the interfacial tension of the substrate.

      Since water has a much higher surface tension than any organic solvent, wetting problems are often observed when using water-based formulations.

      These disturbances can be prevented by the addition of suitable substrate wetting agents, as they significantly reduce the surface tension of the aqueous system. This leads to aqueous formulations with a wetting behavior comparable to solvent-based systems.

      The result:

      • Highly effective wetting
      • Recoatability
      • Additional anti-cratering properties
      • Low foaming tendency

      Wetting and dispersing additives

      Wetting and dispersing additives act in two ways. As surface-active substances, they accelerate the wetting of the pigment agglomerates in the binder and also improve the stability of the pigment dispersion.

      This prevents uncontrolled flocculation of the solids in the coating, which can otherwise lead to quality losses due to separation, low colour strength or so-called rub-out effects.

      Wetting and dispersing additives are essential in pigmented and filled systems and guarantee:

      • Best colour intensity
      • Long stability
      • No rub-out
      • Best compatibility of the paste in the binder

       

       

      Properties and effects:

      • Improvement of colour intensity
      • Pigment stabilisation
      • Pigment wetting
      • Improvement of wetting behaviour
      • Optimum levelling

       

      Industries and markets:

      • Precast
      • Ready Mix Concrete (RMC)
      • Wood Coatings
      • Industrial Coatings
      • Pigment Pastes
      • Architectural Paints
      • Inks
      • Overprint Varnishes
      • Foil Coatings

       

       

      Architecture:

      SILCO AC 1002
      SILCO AC 9100
      SILCO AC 9500

      Coatings:

      SILCO CT 1003
      SILCO CT 1005
      SILCO CT 1008
      SILCO CT 1111
      SILCO CT 2150
      SILCO CT 2165
      SILCO CT 5053

      Graphic Arts:

      SILCO GA 1011
      SILCO GA 1111
      SILCO GA 1018
      SILCO GA 2550
      SILCO GA 1069
      SILCO GA 5053
      SILCO GA 5157


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