Product Description
STWD8028 is a reaction polymerization of polyaspartic ester and polyisocyanate, since polyaspartic is an aliphatic sterically hindered secondary amine, and the curing component selected is an aliphatic polyisocyanate, the coating has high gloss and color retention property that is suitable for long-term outdoor use. When the secondary amine group reacts with the isocyanate group, a high-crosslinking density, cross-interpenetrating polymer chain network structure is formed, which also makes the product have good physical and chemical properties.
Features and benefits
* high solids low density, with good leveling, the coating film is tough, dense, full light and bright colors
* excellent adhesive strength, good compatible with polyurethane, epoxy and other coating film.
* high hardness, good scratch resistance and stain resistance
* excellent abrasion resistance, impact resistance
* excellent anticorrosion property, resist to acid, alkali, salt and others.
* no discoloration, UV resistance, no yellowing, no powdering, aging resistance, with excellent weather resistance and gloss and color retention property
* can be applied directly to the surface of metal surface (DTM)
* this product is environmentally friendly and contains no benzene solvents and lead compounds
Application scopes
Anti-corrosion and protection of steel structures, storage tanks, containers, valves, natural 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) |
1.04 |
1.50 |
| Viscosity (cps)@25ºC |
40-60 |
100-200 |
| Solid content (%) |
75 |
90 |
| Mix ratio (by weight) |
1 |
1 |
| Surface dry time (h) |
1 |
| Pot life (h)@25ºC |
1 |
| Theoretical coverage (DFT) |
0.15kg/m2 film thickness 100μm |
Typical physical properties
| Item |
Test standard |
Results |
| Pencil hardness |
|
H |
| Adhesive strength(Mpa)metal base |
HG/T 3831-2006 |
9.3 |
| Adhesive strength(Mpa)concrete base |
HG/T 3831-2006 |
2.8 |
| Impermeability |
|
2.1Mpa |
| Bending test (cylindrical shaft) |
|
≤1mm |
| Abrasion resistance (750g/500r) mg |
HG/T 3831-2006 |
5 |
| Impact resistance kg·cm |
GB/T 1732 |
50 |
| Anti-aging, accelerated aging 1000h |
GB/T14522-1993 |
Loss of light<1, chalking <1 |
Chemical resistance
| Acid resistance 40%H2SO4 or 10%HCI, 240h |
no rust, no bubbles, no peel off |
| Alkali resistance 40%NaOH, 240h |
no rust, no bubbles, no peel off |
| Salt resistance 60g/L, 240h |
no rust, no bubbles, no peel off |
| Salt spray resistance 1000h |
no rust, no bubbles, no peel off |
| Oil resistance, engine oil 240h |
no rust, no bubbles, no peel off |
| Water resistance, 48h |
No bubbles, no wrinkled,
no color-changing, no peel off |
| (Note: The above chemical resistant property is obtained according to the GB/T9274-1988 test method, for reference only. Pay attention to the influence of ventilation, splash and spillage. Independent immersion testing is recommended if requires other specific data.) |
Processing recommendation
| environment temperature |
-5~+35ºC |
| humidity |
≤85% |
| dew point |
≥3ºC |
Application instructions
Hand brush, roller
Air spray, with air pressure 0.3-0.5Mpa
Airless spray, with spray pressure 15-20Mpa
Recommend dft: 150-300μm
Recoating interval: min 1h, max 24h
Application tips
Agitate part B uniform prior to application.
Strictly mix the 2 parts in right ratio and agitate uniform, use up the mixed material within 1h.
Seal the package well after use to avoid moisture absorption.
Keep the application site clean and dry, forbidden to contact with water, alcohols, acids, alkali etc
Product cure time
| Substrate temperature |
Surface dry time |
Foot traffic |
Solid dry time |
| +10ºC |
2h |
24h |
7d |
| +20ºC |
1.5h |
8h |
7d |
| +30ºC |
1h |
6h |
7d |
Note: the curing time is different with environment condition especially when temperature and relative humidity changes.
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