Micava 498 High Crosslinked Polymer/Double C Composite is two-component phenolic epoxy vinyl ester resin composite made of carbide, carbon-fiber-filled materials. Micava 498 can applied on surface protection from wear, corrosion, and chemical erosion. Micava 498 has excellent properties of high temperature resistance, anti thermal decay, anti chemical erosion, and anti-corrosion.
- Provide a protective resistant to penetration layer on steel and concrete surfaces
- Used on high temperature chimneys and chemical processing exhaust pipe
- Better resistance to acids and solvents compare to vinyl esters
- Protect and repair chemical storage tanks, pumps, reactors, heat exchangers, pressure vessels, exhaust system, etc.
Operating temperature: 230℃ (Dry)
Hardness shore D (ASTM D-2240): 90
Tensile strength (ASTM D-638): 350 kg/ cm²
Compressive strength (ASTM D-695): 1000 kg/ cm²
Adhesive Strength (ASTM D1002): 100 kg/ cm²
Chemical Resistance Data:
50% Sodium hydroxide : G
Saturated sodium chloride : E
40% Hydrofluoric acid: E
Deionized water : E
80% Sulfuric acid : E
98% Sulfuric acid : NR
37% Hydrochloric acid : E
70% Phosphoric acid : E
70% Acetic acid : G
Benzene : E
Acetone : E
Chloroform : NR
*Notes: Samples cured 7 days before the test, the test time is 5 days
E = Excellent (Can be long-term immersed)
G = Good (Can be occasionally sprinkled, but need to remove)
NR = Not Recommend (Cannot be adhered to, material will be damaged)
- Surface Treatment:
Sandblasting the steel surface with chlorine-free abrasive. For external application, the surface should reach SSPC SP-10 standard, close to the white metal treatment standard. After sandblasting the surface, repair surface as soon as possible to prevent surface oxidation, then repair the damaged area properly.
Resin :hardener mixed rate is 100:0.5~2 by weight. When the operating temperature is higher than 28℃, the recommended resin : hardener mixed rate is 100:0.5-1%. When the operating temperature is below 28℃, the recommended resin : hardener mixed rate is 100:1.5-2%. When the operating temperature is higher than 15℃, user can add hardener according to the size of the device and operating requirements.
Do not dilute.
- Application tools:
Stir the resin first, then mix with the hardener well (about 3 minutes). Use a trowel or other tool to flatten brushing.
- Application temperature:
Material temperature: Keep at 55-95℉ (13-35℃)
Substrate temperature: Keep at 45-105℉(7-40℃)
The temperature difference between the substrate and the coating must not exceed 10℉(5℃)
- Re-coating/curing time:
Recoating in the time when material were still soft, within two hours, at 77ºF (25ºC). If the recoating time has been exceeded, polish the surface with sandpaper, grinding, or blasting.
Wash with methyl ethyl ketone or similar products.