Si-N can react with hydroxyl-containing substances and can be used as an amine curing agent. It can also modify hydroxyl-containing resins to improve temperature and weather resistance, such as phenolic resin, epoxy resin, alkyd resin, acrylic resin, etc.
Silazanes are widely used in the rubber industry, ceramic industry, etc. For example, silazane is a good additive in the silicone rubber processing industry. They can not only act as structure optimization control agents but also improve the heat resistance and performance of vulcanized rubber. Mechanical strength has been improved. Therefore, silazane is added to other organic synthetic rubber processing industries to improve its thermal stability and mechanical strength.
| Test items | Performance | Detection method |
|
Color and appearance |
colorless transparent liquid |
GB-T 1721-79 |
|
Viscosity (coat - 4 cups) |
11s |
GB-T 1723-1993 |
|
Quality specifications |
≥96% |
Q/YX 10-2023 |
|
Solid content ((120±2)℃) |
＞98% |
GB/T 1725-2007 |
| Density (g/mL) |
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| Relative molecular mass |
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| Hardness (Pencil) |
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| adhesion |
Level 0 |
|
| Salt spray resistance |
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| temperature |
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Curing conditions
|
Surface stem |
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| Hard work |
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Standard processing procedures
Surface cleaning → roughening → cleaning and blowing → hexamethylcyclotrisilazane treatment → curing
Process description
1. Roughing treatment: Before coating with hexamethylcyclotrisilazane, grind or sandblast the surface of the substrate to remove rust, dust, dirt, etc. attached to the surface of the object to be treated. The roughening treatment has a great influence on the coating effect. The best is Sa2.5 and the minimum is St3 without scale (GB/T 30790.4-2014), so please pay full attention.
2. Cleaning: Use special cleaning agent or degreasing agent to remove oil, dust, etc. remaining on the roughened surface.
3. Dry the substrate: Before coating hexamethylcyclotrisilazane, make sure the surface of the substrate is dry and clean.
4. Paint mixing: This product is a single component. Hexamethylcyclotrisilazane should be shaken thoroughly before use and filtered with 120 mesh for later use.
5. Paint application: The laboratory spraying method of 0.5-1.0 caliber spray gun has better appearance and uniformity.
6. Curing: After spraying, let the surface dry for 10 minutes, then keep and cure at 180°C for 30 minutes (the coating is used below 300°C), or 250°C for 30 minutes (when the coating is used above 300°C).
Storage and transportation
1. It must be stored in accordance with national regulations. The storage environment should be dry, cool, well ventilated, and away from heat and fire sources. Packaging containers must be kept tightly closed and stored with care.
2. The storage temperature should be between 5℃ and 30℃, and the storage period is 6 months.
3. Unused paint must be stored with the lid closed and sealed.
4. The prepared unused paint cannot be recycled and should be disposed of in accordance with local regulations.
5. Products that have exceeded the shelf life can only be used after passing the test.
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