Product Description
China covers a vast geographic area, the various corrosion environment brings great application demand for the roadways and bridges anticorrosion protection. STWD9591 is a high performance one component moisture cure polyurethane coating material, the coating adopts large amount of urea bond, two urea bond, urethane bond and hydrogen bond during the pre polymerization process, it is cured after absorption with air moisture, the dense cross-linked interpenetrating network make the coating film has robust chemical resistance and physical property. It has excellent infiltration and permeability characteristics, and it will react with the hydroxyl bond of the substrate so that the adhesive strength is greatly improved with chemical and physical adhesion. It is flexible material can be long term applied on metal bridges and avoid cracking, it is an ideal material for the metal bridges protection.
Features and advantages
* excellent adhesive strength, bond solid with carbon steel, concrete and other substrates.
* high solid content and meet the requirements of environmentally friendly
*excellent mechanical property, wearable, impact resistance and scratch resistance; flexible coating to resist the cyclic stress
*excellent waterproof property
*excellent anticorrosion property and resistance to many chemical rust medium such as salt spray, acid rain etc.
*hand brushable coating, easy to apply, multiple application method is suitable
*single component, easy application without need of mix with other parts.
*belongs to repair coating, easy to maintain.
Typical use Anticorrosion protection of newly built metal bridges and repair of old bridges steel structure.
Product information
| Item |
Results |
| Appearance |
Color adjustable |
| Viscosity (cps )@20ºC |
250 |
| Solid content (%) |
≥65 |
| surface dry time (h) |
2-4 |
| Pot life (h) |
1 |
| theoretical coverage |
0.13kg/m2(thickness 100um) |
Physical property
| Item |
Test standard |
Results |
| pencil hardness |
GB/T 6739-2006 |
2H |
| bending test (cylindrical mandrel) mm |
GB/T 6742-1986 |
1 |
| breakdown resistance strength (kv/mm) |
HG/T 3330-1980 |
250 |
| impact resistance (kg·cm) |
GB/T 1732 |
60 |
| resistance to temperature changes (-40--150ºC) 24h |
GB/9278-1988 |
Normal |
| adhesive strength (Mpa), metal base |
ASTM D-3359 |
5A (highest) |
| density g/cm3 |
GB/T 6750-2007 |
1.02 |
Chemical resistance
| Acid resistance 50% H2SO4 or10%HCl,30d |
No rust, no bubbles, no peel off |
| Alkali resistance 50%NaOH, 30d |
No rust, no bubbles, no peel off |
| Salt resistance, 50g/L,30d |
No rust, no bubbles, no peel off |
| Salt spray resistance, 2000h |
No rust, no bubbles, no peel off |
| Oil resistance 0# diesel, crud e oil, 30d |
No bubbles, no peel off |
| ( For reference: pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires detailed data.) |
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