TEKNODUR PRIMER 17
Ultra high-solid premium quality polyurethane primer
- 2-component
- Solvent-borne
- Primer
- 2-component
- Solvent-borne
- Primer
TEKNODUR PRIMER 17 is a premium quality, two-component, ultra high-solid primer based on special polyurethane, with excellent filling and levelling properties. Being a polyurethane primer, primed objects can be stored temporarily outdoors while waiting to be top coated. The primer is pigmented with active anticorrosion pigments.
For coating of all kinds of steel parts with high requirements regarding corrosion protection. Main field of applications are within commercial and rail vehicle manufacturing as well as any other industry desiring premium quality polyurethane primer. Together with TEKNODUR 35-900 polyurethane top coat, the product offers fast process throughput times made possible by fast primer overcoating pace. For process simplification this system utilizes the same hardener, TEKNODUR HARDENER 0087, for both primer and top coat.
Technical data sheet
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). Roughening the surface of thin-plate improves the adhesion of the paint to the substrate.
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.
It is recommended that new zinc-coated thin-plate structures are treated with sweep blast-cleaning (SaS). Thin-plate surfaces that have been weathered to matt can be treated also with RENSA STEEL washing agent.
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.
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.
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:
10 : 1 parts by weight
6 : 1 parts by volume
Take into consideration the pot life of the mixture when estimating the amount to be mixed at a time. Before application the base and hardener are mixed in right proportion. Stir thoroughly down to the bottom of the vessel. Inadequate stirring or incorrect mixing ratio results in imperfect curing and impaired film properties.
Stir thoroughly before use.
Brush or roller can be used for touching up.
Application conditions
The surface to be treated must be dry. During the application and drying period the temperature of the ambient air, the surface and the product shall be above +5°C and below +35°C and the relative air humidity below 85%. 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
Storage stability is 1 year in unopened package. Store in a cool place. Most suitable storage temperature is +5°C - +25°C. Must not freeze.
10 : 1 parts by weight
6 : 1 parts by volume
| Total mass of solids | abt. 1250 g/l |
|---|---|
| Volatile organic compound (VOC) | abt. 351 g/l |
| Pot life | 3 h (+23 °C) |
| Pot life, +23°C | Approx. 3 h (+20°C) |
| Hardener | Comp. B: TEKNODUR HARDENER 0087 |
| Gloss | Semi-matt |
| Practical spreading rate | The values depend on the application technique, surface conditions, overspray, etc. |
| Drying time – dust free | Approx. 60 – 90 min. |
| Drying time – touch dry | Approx. 4 – 6 h |
| Thinner | TEKNOSOLV 6622 |
| Clean up | TEKNOCLEAN 6496 |
| Colours | Dusty grey. |
| Safety markings | See safety data sheet. |