TEKNODUR COMBI 3560-19

Polyurethane paint

  • Corrosion protective
  • UV resistant
  • Wear resistant
  • 2-component
  • Single coat paint

TEKNODUR COMBI 3560-19 is a two pack polyaspartic based polyurethane paint where the hardener used is an aliphatic isocyanate resin. The hardener is an aliphatic isocyanate resin.

Used in weather resistant polyurethane system. As an anticorrosive pigmented the paint is suitable to use as a one-layer paint on metal surfaces. The paint produces a film with good mechanical and weather resistance. The use of TEKNODUR 0290 Polyurethane Varnish is recommended on objects when the topcoat is required to have excellent gloss and colour retention.

Surface preparation

Remove from the surfaces any contaminants that might be detrimental to surface preparation and application. Remove also water-soluble salts by using appropriate methods. The surfaces are prepared according to the different materials as follows: STEEL SURFACES: Remove mill scale and rust by blast cleaning to preparation grade Sa 2½ (standard ISO 8501-1). The profile of the blast-cleaned surface should be coarse (reference comparator "G") ISO 8503-2 (G). The surface of thin-plate can be prepared e.g. by phosphating. OLD PAINTED SURFACES SUITABLE FOR OVERCOATING: Any impurities that might be detrimental to the application of paint (e.g. grease and salts) are removed. The surfaces must be dry and clean. Old, painted surfaces that have exceeded the maximum overcoating time are to be roughened as well. Damaged parts are prepared in accordance with the requirements of the substrate and the maintenance coating. ZINC SURFACES: Hot-dip-galvanized steel structures that are exposed to atmospheric corrosion can be painted if the surfaces are sweep blast-cleaned (SaS) till matt all over. Suitable cleaning agents are, e.g. aluminium oxide and natural sand. It is not recommended according to standard ISO 12944-5 to paint hot-dip-galvanized objects that are subjected to immersion strain. Painting of hot-dip-galvanized objects that are subjected to immersion strain must be discussed separately with Teknos. ALUMINIUM SURFACES: Treat the surfaces with RENSA STEEL washing agent. Surfaces that are exposed to weathering are also roughened up with sweep blast-cleaning (AlSaS) or sanding. The place and time of the preparation are to be chosen so that the prepared surface will not get dirty or damp before the subsequent treatment. Additional instructive information for surface preparation can be found in standards EN ISO 12944-4 and ISO 8501-2.

Application

MIXING OF THE COMPONENTS: Take into consideration the pot life of the mixture when estimating the amount to be mixed at a time. The base must be stirred until it is homogeneous before mixing the components. Before application the base and hardener are mixed in right proportion. Stir thoroughly down to the bottom of the vessel. The stirring time is at least 5 min. Inadequate stirring or incorrect mixing ratio results in imperfect curing and impaired film properties. Stir thoroughly before use. Before use clean the spray gun and paint vessels with a thinner suitable for the paint.

Application conditions

The surface to be treated must be dry and the relative air humidity below 80%. During the application and drying period the temperature of the ambient air and the surface shall be at least above -5°C, and the temperature of the product above +15°C during mixing and spraying. Additionally, the temperature of the surface to be treated and the product must be at least +3°C above the dew point of the ambient air.

Storage

The storage stability is shown on the label. Store indoors in a cool and dry place and in a tightly closed can. The hardener reacts with air humidity and therefore the opened can is to be kept carefully closed, and it is recommended to be used within 14 d of opening.

Suitable airless nozzle size 0.013 - 0.017"
Total mass of solids abt. 1700 g/l
Volatile organic compound (VOC) abt. 60 g/l
Pot life 15 min. (+23 °C)
Mixing ratio 3:1 by volume (comp. A : comp. B)
Hardener Comp. B: TEKNODUR HARDENER 7226
Gloss Gloss
Tinting system Teknotint
Practical spreading rate The values depend on the application technique, surface conditions, overspray, etc.
Drying time – dust free 40 min (ISO 9117-3:2010)
Drying time – touch dry 1 h 15 min (ISO 9117-5:2012)
Drying time – through-dry 2 h (ISO 9117-1:2009)
Thinner TEKNOSOLV 9526
Clean up TEKNOCLEAN 6496
Colours By agreement.
Safety markings See safety data sheet. The hardener of the product and the ready mixture contain isocyanates. In poorly ventilated areas and especially when using spray application we recommend the use of a fresh air mask. In short or temporary work, a mask with combined filter A2-P2 can be used. In this case eyes and face are to be protected.
Gloss value 85-95