KF-PC300 scratch-resistant hard coating is a UV-cured / thermally cured nano-hybrid hard coating developed for polycarbonate (PC) transparent parts. Although PC offers excellent transparency and impact resistance, its surface hardness is very low (pencil hardness <2B) and it scratches easily. Once cured, the KF-PC300 coating forms a 3–15 μm nano SiO₂/Al₂O₃ hybrid hard layer on the PC surface, raising the pencil hardness to 2H–4H while retaining the PC's transparency (transmittance loss <3%) and impact resistance. It is widely used on transparent PC parts such as automotive headlamp lenses, instrument-cluster covers, safety face shields and spectacle lenses that require high transparency, high impact resistance and scratch resistance together.
TDS Technical Data Sheet – PC Scratch-Resistant Hardened Coating KF-PC300
Technical Data Sheet · PC scratch-resistant hardened coating · KF-PC300
1. Product Description
2. Typical Applications
Suitable for coating protection in fields related to the plastic-substrate coatings category. For specific applications, please contact Kexin New Materials Technical Dept at 400-901-0757.
3. Technical Parameters
| Product type | Dedicated coating for plastic substrates |
|---|---|
| Color | Full color range (with metallic effect) |
| Gloss | High gloss (>85 GU)/semi-gloss/matte/rubber-feel |
| Volume solids | 35±5% |
| Recommended DFT | 10-25 μm per coat |
| Theoretical spreading rate | 14-30 m²/L |
| Surface dry time (23°C) | ≤15 min (23°C or 60°C/5 min) |
| Hard dry time (23°C) | ≤2 h (23°C) or 60°C/30 min |
| Application temperature | 15-35°C |
| VOC content | <420 g/L |
| Adhesion | Grade 0 (cross-cut test) |
| Packaging Specs | 4 L / 20 L drum packaging |
| Shelf Life | 12 months |
| Standard | GB/T 25263 / automotive interior-parts standard |
4. Application Guide
Surface preparation
Thoroughly clean the substrate surface to remove oil and rust. Abrasive-blast steel to Sa2.5 (ISO 8501-1) with 40-75μm surface profile. Concrete substrate moisture content must be below 6%, grind to remove laitance. For old coatings, remove loose areas and roughen the surface.
Mixing / compounding
According to the mix ratio indicated on the product label, add the hardener (component B) slowly to the base (component A) and mechanically stir for 3-5 minutes until uniform. Let stand to mature for 10-15 minutes before use. Use up within the specified pot life after mixing.
Application method
Recommended air spray (gun orifice 1.5-2.0 mm, pressure 0.4-0.6 MPa) or airless spray (nozzle 0.38-0.53 mm, pressure 15-25 MPa). Small areas may be brushed or rolled. Keep each coat dry film thickness within the specified range.
Curing conditions
Self-cures at ambient temperature (23°C) provided relative humidity meets requirements. Do not apply under low temperature (<5°C) or high humidity (>85%). Conduct performance testing only after full cure.
5. Packaging & Storage
| Packaging Specs | 4 L / 20 L drum packaging |
|---|---|
| Storage Conditions | Store at 5–35°C in a cool, dry, ventilated place away from ignition and heat sources; keep container sealed. |
| Shelf Life | 12 months |
| Transport | Transport as non-hazardous goods. In summer, ship in early morning or evening; avoid sun exposure. |
6. Health & Safety Notes
⚠️ Important safety notice
Read and understand the product's MSDS (Material Safety Data Sheet) carefully before using this product.
- Proper personal protective equipment (gloves, goggles, protective suit) must be worn during application
- Ensure the work area is well ventilated
- Keep away from fire and heat sources
- Avoid inhaling vapours and mist
- Avoid contact with skin and eyes
- If you feel unwell, stop work immediately and seek medical advice
Disclaimer
The data in this TDS are typical values and do not constitute product specifications. Actual product performance may vary depending on application conditions, substrate condition and environmental factors. Users are advised to conduct small-scale sample tests before bulk use to confirm product suitability.
Kexin New Materials continuously improves its products and reserves the right to modify technical parameters without prior notice. For the latest version please visit www.psste.com/pc-scratch-resistant-hard-coating-tds/ page.
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