Solvent-free Topcoat
Applications:
It is mainly used in heavy corrosion protection fields such as urban pipeline anti-corrosion, internal and external corrosion protection of buried pipelines, patching, elbows, and anti-corrosion overhaul of buried pipelines.
Coating properties:
- Low odour, low VOC, high hardness, acid and alkali resistance
- High hardness, up to 2H
- Stable colour: no colour separation during construction
- Good levelling: no rolling marks in rolling coating, no brush marks in brushing coating.
- Low cost advantage, suitable for all kinds of floors
Technical Index
| Pilot projects | unit | index | |
|---|---|---|---|
| Dry | Actual Dry | h | ≤4 |
| Time(25℃ ) | Actual Dry | h | ≤24 |
| Hardness(Shore D) | – | ≥90 | |
| Impact resistance (500g steel ball) | g.cm | Pass | |
| Wear resistance (750g/500r) | g | ≤0.02 | |
| Adhesion(Grid method) | level | 1 | |
| Water resistance | 7 days | No significant changes | |
| Resistant to 20% sulphuric acid | 7 days | No significant changes | |
| Resistant to 20% sodium hydroxide | 7 days | No significant changes | |
| Resistant to 120# petrol | 7 days | No significant changes | |
| Bonding strength | Mpa | ≥3.2 | |
| Compressive strength | Mpa | ≥70 | |
Construction procedure
Construction method
1. Construction base surface requirements: sanding, sweeping to clean, repair;
2. If the humidity of the basic surface is >18%, the construction must be stopped, and the construction can only be carried out when the humidity of the surface is <18%, otherwise it will be easy to blister;
3. Operation requirements: before construction, mix the A material fully, add the B
material according to the proportion, mix them for about 3 minutes, and then use a roller
to roll or flat scraper to scrape the coatingevenly to get a flat and even surface coating;
4. Use time limit: when the product in ≈ 25 °, it can be used for about 45 minutes, please
determine the amount of ingredients each time according to the actual construction
progress. The prepared materials must be used up at one time, and the remaining
materials A and B must be sealed and stored.
