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 benefitsItem | 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 |
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 |
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.) |
environment temperature | -5~+35ºC |
humidity | ≤85% |
dew point | ≥3ºC |
Substrate temperature | Surface dry time | Foot traffic | Solid dry time |
+10ºC | 2h | 24h | 7d |
+20ºC | 1.5h | 8h | 7d |
+30ºC | 1h | 6h | 7d |