Durability of Colored Thermoplastic Road Marking Paint in Extreme Climates
Colored thermoplastic road marking paint exhibits varying durability under extreme temperatures, with performance heavily dependent on material formulation and application precision. Here’s a climate-specific analysis:
1. Extreme Heat Performance
High-Temperature Stability: Premium thermoplastic paint with C5 petroleum resin (softening point ≥100°C) and alumina/zirconia-coated titanium dioxide resists softening and fading. Tests show optimized formulations retain 85% reflectivity after 2,000 hours of UV exposure, lasting 2–3 years in regions with 60°C+ pavement temperatures.
Anti-Slip: Ceramic/quartz aggregates (2–3mm) maintain friction coefficients ≥0.45, critical for wet-road safety.
2. Extreme Cold Challenges
Low-Temperature Flexibility: Modified resins (e.g., elastic TPU) and plasticizers prevent cracking at -30°C, though standard formulations may fail in -40°C freeze-thaw cycles. Northern China projects report 1.5–2 years lifespan with hybrid glass-ceramic beads.
Adhesion Issues: Low surface energy in cold reduces bonding; primers and 180–220°C application temperatures are critical to avoid peeling.
3. Humid/Rainy Climates
Moisture Resistance: Dense filler networks (e.g., quartz sand) minimize water infiltration, while hydrophobic coatings protect glass beads from脱落. Poor humidity control during application causes bubbling.
Future Trends: Bio-resins and self-healing polymers aim to extend lifespan in all climates.
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