Description
Two component polyurethane primer-enamel, hardened by aliphatic polyisocyanateScope and specifics of application
Polytex ST primer enamel due to the corrosion inhibitor actively prevents the appearance of rust, so it has long-term protective and high decorative characteristics. It is available with a different degree of gloss: from deep matt to glossy, has a wide choice of color solutions. It does not require pre-priming.
Suitable for repair work.
It is used to paint and provide long-term anti-corrosion protection of concrete, reinforced concrete and metal structures operated in the conditions of industrial atmosphere of moderate, cold and marine climates, including railway bridges, road bridges, road fences, construction cranes, power line supports, pipeline supports, antenna-mast structures, ground parts of piles, supports of pipeline overpasses, external surfaces of pipelines, external surfaces of diverse tanks and tanks for storing chemical reagents and petroleum products, underwater parts of hydraulic structures and other metal structures and equipment exposed to atmospheric corrosion.
Polytex ST enamel primer has good adhesion, bending strength, increased resistance to moisture, as well as increased hardness, strength and abrasion resistance, oil and gasoline resistance, and resistance to mineral fertilizers. It is used in conditions of diverse aggressive impacts – chemical, atmospheric, mechanical.
Information on the material resistance to various media is available on request.
Main applications: oil and gas industry, power engineering, mechanical engineering, chemical industry.
The material is approved by Railway Research Institute of JSC Russian Railways and can be used for painting freight cars. According to the results of accelerated climatic tests, the coating has a service life of 12-20 years, depending on the thickness of the dry film (120-170 microns).Instruction for use
Metal surface should be abrasive blasted to grade 1 or 2 to GOST 9.402 (Sa 2,5 or Sa 2 по ISO 8501-1:2007). Clean surface must be free from dust and grease.
If the quality of surface preparation decreases, the service life and its operating performance may change.
Conditions
Relative air humidity no more 80%.
The process of applying
|
Blending |
Polyurethane primer-enamel consists of two components: component А - basis, component B - hardener. Before use, pre-mix component A with a low-speed drill with mixing nozzle, then mix with component B in stoichiometric ratio in the delivery form. Mix the resulting material thoroughly until smooth. After the hardener is added into the semi-finished product, the material should be allowed to stand for at least 5-10 minutes. |
| Proportions |
Hardener Polytex ST 100:15 by weight 6,0:1 by volume Hardener Polytex ST2 100:12 by weight 8,0:1 by volume |
|
Pot life at 20±20С, no less |
5 hours |
|
Air-free spraying |
Thinning:5-30% Nozzle diameter: 0,011-0,017" Initial pressure: 120-160 atm |
| Air spraying |
Operation viscosity:25-60 s Thinning:5-35% Nozzle diameter:1,8-2,5 mm Initial pressure: 3,0-4,0 atm |
|
Air spraying RAL 9006 |
Operation viscosity: 18-25 s Thinning: 20-30% Nozzle diameter:1,4-1,8 mm Initial pressure: 2,0 atm The maximum thickness of a single–layer coating at a viscosity of 18-25 seconds is 100-125 microns. In a wet film thickness of 100-125 microns (dry film thickness 20-30 microns), a uniform distribution of pigment and color is observed. If a larger dry film thickness is required, the material is applied in two layers with interlayer drying in a chamber of 40-60 ° C -20-30 minutes or at a temperature of 20 ° C - 60 minutes. Due to the specifics of aluminum pigments, thorough mixing of the mixture is required during work interruptions. |
|
Cross linking at 200С |
30 min |
| Roller Brush |
Can be recommended for small and hard-to-reach areas. Thin the primer-enamel depending on the working conditions when using brush. |
|
Thinner |
Formula thinner Polytex, Polytex SLOW, Polytex F. |
|
Cleaner |
Formula thinner Polytex, thinners of type Р4, Р5. |
|
Finishing |
Tubing, pistol and other spraying tools must be cleaned after using. |
|
Cleaning |
Clean straight after using due to painting equipment manual. |