IntroductionAcrylic polyol resin MT-7152-80 is a hydroxyl-functional polymer designed for high-
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Acrylic polyol resin MT-7152-80 is a hydroxyl-functional polymer designed for high-performance coating systems. This article presents key technical data through structured tables covering its properties, formulation guidelines, curing characteristics, and application performance.
| Property | Spécification | Test Method |
|---|---|---|
| Solid Content | 80±2% | ISO 3251 |
| Hydroxyl Value (mg KOH/g) | 120±5 | ASTM D4274 |
| Viscosity (25°C, mPa·s) | 3000-6000 | Brookfield RV, spindle 3 |
| Acid Value (mg KOH/g) | ≤5 | ASTM D4662 |
| Color (Gardner) | ≤2 | ASTM D1544 |
| Solvent System | Xylene/Butyl Acetate | GC Analysis |
| Curing Agent Type | NCO:OH Ratio | Dry Time (25°C) | Pencil Hardness | Flexibility |
|---|---|---|---|---|
| HDI Trimer | 1.1:1 | 4h tack-free | 2H | Pass 1mm mandrel |
| IPDI Trimer | 1.0:1 | 6h tack-free | 3H | Pass 2mm mandrel |
| TDI Adduct | 1.2:1 | 2h tack-free | H | Pass 3mm mandrel |
| Component | Automotive Refinish (%) | Industrial Coatings (%) | Plastic Coatings (%) |
|---|---|---|---|
| MT-7152-80 | 60-70 | 50-60 | 40-50 |
| Curing Agent | 20-25 | 15-20 | 10-15 |
| Additifs | 2-3 | 3-5 | 2-4 |
| Solvents | 5-15 | 15-25 | 30-40 |
| Pigments | 0-10 | 5-20 | 5-15 |
| Property | Test Method | Typical Result |
|---|---|---|
| Gloss (60°) | ASTM D523 | ≥90 |
| Adhesion (Cross-cut) | ISO 2409 | 0-1 |
| Impact Resistance | ASTM D2794 | 50kg·cm direct |
| Chemical Resistance | MEK Double Rubs | ≥200 |
| Weather Resistance | QUV-B 1000h | ΔE<2.0 |
Excellent UV durability and color retention
Balanced hardness/flexibility for multi-substrate adhesion
Good compatibility with most polyisocyanate crosslinkers
Suitable for high-solids formulations (up to 70% NV)
Automotive OEM and refinish coatings
Industrial maintenance paints
Plastic component coatings
High-end decorative finishes
Optimal application viscosity: 80-120 sec (DIN4 cup)
Recommended cure schedule: 20min@80°C or 7d@25°C
Pot life (mixed): 4-6 hours at 25°C
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