01
ST-PA450 Transparent Polyaspartic Acid Ester Polyurea
Uses
The adaptability and adhesion of polyaspartic acid ester pure polyurea allow it to be applied in almost any application requirement such as waterproofing, anti-corrosion, and industrial floor coating protection, including: metal surfaces such as steel, concrete, wood, stone, ceramic tiles, etc. and many other aspects of waterproofing and anti-corrosion and industrial floors. Due to its transparency, it can be processed to have various colors and plays an important role in aesthetics.
Performance indicators
|
Type |
ST-PA450 |
| Main components | Aliphatic polyurea |
| Solid content | ≧80% |
| Walking time after brushing | ＜12h |
| Tensile strength,MPa, | ≥6 |
| Elongation at break,%, | ≥150% |
| Gloss | High glossiness |
| Impermeability | 0.3MPa，120min，Impermeability |
| Shore hardness,Shore D | 50-70 Customized and adjustable |
| Corrosion resistance（2%H2SO4 solution，168h） | No bubbles, no detachment, no cracks |
| Tear strength（N/mm） | ＞80 |
| Corrosion resistance（2%H2SO4 solution，168h） | No bubbles, no detachment, no cracks |
| Environmental performance | National environmental protection requirements |
| Adhesive force/pull-out method for dry concrete | ≥1.5MPa |
| Abrasion resistance，750g/500r | ≤30mg |
Construction process suggestions
Process flow: Base surface cleaning → Roller application of special sealing primer → Manual polyurea layer
Clean the base layer: Conduct base layer acceptance before primer layer construction. The surface should be flat, with distinct slopes and edges, no sharp foreign objects, no sanding, no peeling, no honeycomb pitting, no unevenness, and no rust and other defects. The surface of the base layer should be kept dry, and there must be no visible water.
Polyurea special sealing primer layer: It is advisable to use spraying, brushing or rolling to evenly apply the special sealing primer on the surface of the base layer (the primer layer is prohibited from being constructed if the base material surface is not completely treated). The next step can be constructed only after it is completely dry. The construction interval should not exceed 24 hours.
Polyurea layer: Use hand brushing or spraying process for construction. Generally, it is carried out 2 hours after the primer construction is completed and before 24 hours. The construction thickness is about 0.5 to 1.5mm to ensure no missed coating, no accumulation, uniform construction, and one-time or multiple times of molding in place. (The thickness can be adjusted according to the design requirements).
Note: The entire scraping process must be repeatedly scraped with force using the cross method to avoid defects.