TEKNOPOX PRIMER 7-00
Fast drying epoxy primer
- Corrosion protective
- Low-temperature curing
- 2-component
- Solvent-borne
- Intermediate
- Primer
- Corrosion protective
- Low-temperature curing
- 2-component
- Solvent-borne
- Intermediate
- Primer
TEKNOPOX PRIMER 7-00 is a fast curing two-pack epoxy primer containing anticorrosive pigments (zinc phosphate). The product cures also in low temperatures (above -10ºC).
The paint is used as anticorrosive coating, primer or intermediate coat in painting systems suited for fast recoating with another layer or in automated painting systems. It is also suitable for anticorrosive systems for road and rail transport vehicles. The very smooth, matt surface, hard, mechanically resistant and well attached to subjects. The surface is resistant to atmospheric conditions. Exposed to direct sun radiation, the surface may chalk or change the shade.
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.
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. From the bare steel surfaces the rust is removed to preparation grade at least St 2 (ISO 8501-1).
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
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. Mixing by machine is recommended, for example a slow-rotating hand-drill equipped with a mixer. Inadequate stirring or incorrect mixing ratio results in imperfect curing and impaired film properties.
Apply by airless spray, air spray or brush (only for small areas). For brush painting it is recommended to thin paint (abt. 3% of thinner) and to paint several times to achieve typical dry film thickness. Airless spray parameter:
Nozzle size 0.013 - 0.017"
Nozzle pressure 20 - 30 MPa For air spray application it is recommended to thin the paint to 20-25 seconds according to Ford cup Ø4. When preparing painting specification, depending on subject and type of construction, different dry film thickness than recommended can be assumed. During airless spray application typical dry film thickness range is between 80 and 300 µm. Different dry film thickness than recommended causes change in theoretical spreading rate, wet film thickness, weight of dry film thickness, drying time, overcoating time and ready for handling time.
Application conditions
During the application and drying period the temperature of the ambient air shall be above -10°C, of the paint should be over +15°C and the relative air humidity below 85%. The minimum temperature of the surface shall be above -5°C (frost- and ice-free surface) and at least 3°C higher than dew point of the ambient air. Adequate ventilation during application and drying period is recommended.
Storage
The storage stability is shown on the label. Store in a cool place and in tightly closed containers.
| Total mass of solids | abt. 1200 g/l |
|---|---|
| Volatile organic compound (VOC) | abt. 320 g/l |
| Pot life | 3 h (+23 °C) |
| Mixing ratio | 7:1 by volume (comp. A : comp. B) |
| Hardener | Comp. B: TEKNOPOX HARDENER 7377 |
| Gloss | Matt |
| Practical spreading rate | The values depend on the application technique, surface conditions, overspray, etc. |
| Drying time – dust free | after 15 min |
| Drying time – touch dry | after 45 min |
| Drying time – fully cured | after 5 days |
| Thinner | Not needed. If needed (eg. rise in viscosity) use TEKNOSOLV 9506. |
| Clean up | TEKNOSOLV 9506 |
| Colours | TO-880 dark grey, TO-010 white, RAL 7011 |
| Safety markings | See safety data sheet. |