IntroductionHydroxyfunctional polyacrylic dispersion MT-A-145 represents an advanced waterborne
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Hydroxyfunctional polyacrylic dispersion MT-A-145 represents an advanced waterborne resin technology designed for environmentally friendly coating systems. This colloidal system combines the performance benefits of acrylic polyols with the sustainability advantages of water-based formulations.
Property | Especificaciones | Test Method |
---|---|---|
Apariencia | Milky white liquid | Visual inspection |
Solid content | 40±1% | ISO 3251 |
Hydroxyl value (mg KOH/g) | 55±3 | ASTM D4274 |
pH value | 7.5-8.5 | ISO 976 |
Viscosity (25°C, mPa·s) | 100-500 | Brookfield LV |
Particle size (nm) | 80-120 | Dynamic light scattering |
Parameter | With HDI trimer | With IPDI trimer | With Polyaziridine |
---|---|---|---|
Pot life (h) | 6-8 | 8-10 | 4-6 |
Dust-free time (min) | 45-60 | 60-90 | 30-45 |
Full cure (h) | 72 | 96 | 48 |
Pendulum hardness (s) | 120-140 | 140-160 | 100-120 |
MEK resistance (double rubs) | 200+ | 200+ | 150+ |
Component | Wood Coating (%) | Industrial Coating (%) | Plastic Coating (%) |
---|---|---|---|
MT-A-145 | 60-70 | 50-60 | 40-50 |
Curing agent | 8-12 | 6-10 | 5-8 |
Wetting agent | 0.2-0.5 | 0.1-0.3 | 0.3-0.6 |
Defoamer | 0.1-0.3 | 0.1-0.3 | 0.2-0.4 |
Thickener | 0.5-1.0 | 0.3-0.8 | 0.8-1.2 |
Water | 15-25 | 20-30 | 30-40 |
Property | Test Method | Typical Value |
---|---|---|
Gloss (60°) | ASTM D523 | ≥85 |
Adhesion (cross-cut) | ISO 2409 | 0-1 |
Flexibility (conical mandrel) | ASTM D522 | Pass 3.2mm |
Impact resistance (direct) | ASTM D2794 | 50kg·cm |
Water resistance (240h) | ISO 2812-2 | No blistering |
Weather resistance (QUV-B 500h) | ASTM G154 | ΔE<2.0 |
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