Description
Two component polyurethane primer-enamel, hardened by aliphatic polyisocyanate.
Scope and specifics of application
POLYTEX BST enamel primer, due to the corrosion inhibitor, actively prevents rust formation, so possess long-term protective and high decorative characteristics. It is available with various degrees of gloss: from deep matt to glossy as well as there is a wide choice of color solutions. It does not need pre-priming.
Suitable for repair work.
POLYTEX BST is used to paint and give long-term anti-corrosion protection of concrete, reinforced concrete and metal structures operated in the conditions of industrial atmosphere of moderate, cold and marine climate, 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 facilities and other metal structures and equipment exposed to atmospheric corrosion.
PolytexBST 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.
Instruction for use
Metal surface should be abrasive blasted to grade 1 or 2 to GOST 9.402 (Sa 2,5 or Sa 2 to 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 |
Polytex ST hardener 100:12 by weight 7:1 by volume Polytex ST2 hardener 100:10 by weight 9:1 by volume Polytex ST2S hardener 100:25 by weight 3:1 by volume |
|
Pot life at 20±20С, no less |
4 hours |
|
Air-free spraying |
Thinning:5-30% Nozzle diameter: 0,011-0,017" Initial pressure: 120-160 atm |
| Air spraying |
Operational viscosity:25-100 s Thinning:5-35% Nozzle diameter:1,8-2,5 mm Initial pressure: 3,0-4,0 atm |
| 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, RP-1K. |
|
Cleaner |
Formula thinner Polytex, thinner of type Р-4. |
|
Finishing |
Tubing, pistol and other spraying tools must be cleaned after using. |
|
Cleaning |
Clean straight after using due to painting equipment manual. |