HALS + UVA Stabilizer Package for Outdoor Drone Plastics
Key Features
- Dual HALS + UVA mechanism extends drone plastic QUV life from 200–400h to 2,000+h before 50% strength loss
- High-MW HALS (>2,000 g/mol) — zero surface bloom in pigmented drone shells, maintains cosmetic appearance
- Benzotriazole UVA absorbs 290–380 nm — protects against both UVA and UVB weathering zones
- Stable to 280°C processing temperature — compatible with PA6 twin-screw compounding conditions
- 0.3–0.8 wt% loading range — minimal effect on mechanical properties or colorant matching
- Compatible with HFFR flame retardant packages for co-stabilized FR + UV drone shell compounds
A synergistic hindered amine light stabilizer (HALS) and ultraviolet absorber (UVA) combination package for injection-molded drone shell plastics, propeller guards, and agricultural drone structural components intended for prolonged outdoor UV exposure. The HALS component (sebacate-type, molecular weight >2,000 g/mol) acts as a radical scavenger in the photo-oxidation chain reaction, while the benzotriazole UVA component (UV-328 or UV-329 equivalent) absorbs UV radiation in the 290–380 nm range and dissipates it as harmless heat — a dual-mechanism approach that provides greater stabilization than either component alone.
At 0.3–0.8 wt% total package loading in ABS, TPU, PA6, and PA12, the system extends QUV weatherometer life from the 200–400 hours typical of unstabilized drone plastics to 2,000+ hours before reaching 50% retention of tensile strength — equivalent to 5–7 years of typical outdoor exposure in temperate climates. For equatorial and high-UV-index environments (agricultural drones operating in tropical regions), combine with an additional 0.2 wt% UVA for enhanced protection.
The high-molecular-weight HALS is designed for low volatility — it does not migrate to the surface during outdoor service, preventing the white bloom defect seen with low-MW HALS grades in pigmented drone shells. Compatible with halogen-free flame retardant packages and carbon black pigments. Available as a masterbatch pellet or powder blend.
Specifications
| Parameter | Value |
|---|---|
| Composition | HALS (sebacate type, MW >2,000) + Benzotriazole UVA (UV-328/329 equiv.) |
| Physical form | Masterbatch pellet (10 wt% active) or powder blend |
| Bloom resistance | Excellent (high-MW HALS, <0.05% surface migration) |
| HALS molecular weight | >2,000 g/mol (low volatility grade) |
| Compatible base resins | ABS, TPU, PA6, PA12, PC/ABS |
| RoHS / REACH compliant | Yes |
| Recommended loading (ABS, PA6) | 0.3–0.8 wt% |
| Thermal stability (processing) | Stable to 280°C (PA6 processing range) |
| UV absorption range (UVA component) | 290–380 nm |
| QUV weatherometer life (ABS, 0.5 wt%) | >2,000 h to 50% tensile strength retention |
Applications
FAQ
For tropical environments (UV index 10–12, equatorial year-round high insolation), the standard 0.5 wt% package provides approximately 2,000 hours QUV life in ABS. In accelerated UV testing, this corresponds to roughly 3–4 years in a tropical outdoor environment (versus 5–7 years in temperate Europe). For agricultural drones operating 8–10 hours/day in tropical sun year-round, increase the loading to 0.8 wt% total package (or add 0.2 wt% additional UVA on top of the standard package). Additionally, a UV-blocking white or silver topcoat reduces UV penetration into the substrate by 80–95%, complementing the internal UV stabilizer and providing maximum protection for tropical-use agricultural drones.
Direct Contact
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HALS + UVA Stabilizer Package for Outdoor Drone Plastics
Dual HALS + UVA mechanism extends drone plastic QUV life from 200–400h to 2,000+h before 50% strength loss