Product Description
STWD8031 is polymerized by the reaction of polyaspartic and polyisocyanate. Since polyaspartic ester is aliphatic sterically hindered secondary amine, and the selected curing component is aliphatic polyisocyanate, the formed coating membrane has high gloss and color retention property, suitable for long-term outdoor use. When the secondary amine group reacts with isocyanate group, it will form a high crosslink density, cross-interpenetrating polymer chain network, that also makes it has excellent physical and chemical performance. It is an updated innovation of anticorrosion product.
Features and benefits
* high solids, low density, with good leveling, the coating film is tough, dense, full bright
* excellent adhesive strength, good compatible with polyurethane, epoxy and other material.
* high hardness, good scratch resistance and stain resistance
* excellent abrasion resistance and impact resistance
* excellent anticorrosion property, resistance to acid, alkali, salt and others.
* no yellowing, no color change, no pulverization, anti-aging, it has excellent weather resistance and light and color retention.
* can be used as a topcoat direct to metal surface (DTM)
* this product is environmentally friendly and contains no benzene solvents and lead compounds.
* can be applied in the low temperature of -10ºC, the coating is dense, fast cure.
Application scopes
Anticorrosion and protection of steel structures, storage tanks, containers, valves, gas pipelines, frames, axles, shelves, tank trucks, swimming pools, sewage pools, chemical cofferdams, etc.
Product information
| Item |
A component |
B component |
| Appearance |
light yellow liquid |
Color adjustable |
| Specific gravity(g/m³) |
1.05 |
1.60 |
| Viscosity (cps)@25ºC |
600-1000 |
800-1500 |
| Solid content (%) |
98 |
97 |
| Mix ratio (by weight) |
1 |
2 |
| Surface dry time (h) |
0.5 |
| Pot life h (25ºC) |
0.5 |
| Theoretical coverage (DFT) |
0.15kg/m2 film thickness 100μm |
Typical physical properties
| Item |
Test standard |
Results |
| Pencile hardness |
|
2H |
| Adhesive strength (Mpa) metal base |
HG/T 3831-2006 |
9.3 |
| Adhesive strength (Mpa) concrete base |
HG/T 3831-2006 |
3.2 |
| Impermeability |
|
2.1Mpa |
| Bending test (cylindrical axis) |
|
≤1mm |
| Abrasion resistance (750g/500r) mg |
HG/T 3831-2006 |
12 |
| Impact resistance kg·cm |
GB/T 1732 |
50 |
| Anti-aging, accelerated aging 2000h |
GB/T14522-1993 |
Loss of light<1, chalking <1 |
Chemical resistance
| Acid resistance 35%H2SO4 or 10%HCI, 240h |
no rust, no bubbles, no peel off |
| Alkali resistance 35%NaOH, 240h |
no rust, no bubbles, no peel off |
| Salt resistance 60g/L, 240h |
no rust, no bubbles, no peel off |
| Salt spray resistance 3000h |
no rust, no bubbles, no peel off |
| Oil resistance, engine oil, 240h |
no rust, no bubbles, no peel off |
| Waterproof, 48h |
No bubbles, no wrinkled,
no color-changing, no peel off |
| (For reference: the above data is acquired based on GB/T9274-1988 test standard. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data) |
Application temperature
| environment temperature |
-5~+35ºC |
| humidity |
≤85% |
| dew point |
≥3ºC |
Application instructions
Hand brush, roller
Two component ratio-variable high pressure airless spray machine
Recommend dft: 200-500μm
Recoating interval: min 0.5h, max 24h
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