Waterborne Hydroxyl Acrylic Resin
Paint chemicals 2025-03-21
Performance Features
E-10 modified,high OH value, hardness, great film fullness, weather resistance,zero VOC
Waterborne Hydroxyl Acrylic Resin: Overview and Key Properties
| Category | Details |
|---|---|
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Dispersion Medium | Water |
| Hydroxyl Value | 30–150 mg KOH/g |
| Key Feature | Low VOC, eco-friendly curing |
Physical & Chemical Properties
| Property | Typical Value |
|---|---|
| Solid Content | 35–50% |
| Viscosity (25°C) | 50–500 mPa·s |
| pH | 7.0–9.0 |
| Particle Size | 50–200 nm |
| Minimum Film Formation Temp. (MFFT) | 0–30°C |
Curing Systems
| Crosslinker | Cure Conditions | Features |
|---|---|---|
| Polyisocyanate | 20–80°C, 1–24 hrs | Excellent chemical resistance |
| Amino Resin | 120–160°C, 20–40 min | High hardness |
| Carbodiimide | RT-60°C, 2–8 hrs | Moisture-tolerant |
Applications
| Industry | Use Case | Key Benefit |
|---|---|---|
| Industrial Coatings | Metal furniture, machinery | Corrosion resistance |
| Automotive | Plastic part coatings | Adhesion to PP/ABS |
| Wood Finishes | Furniture, flooring | Low yellowing |
| Packaging | Food can coatings | FDA compliance |
Formulation Guidelines
| Component | Function | Typical % |
|---|---|---|
| Resin Dispersion | Base polymer | 70–90% |
| Coalescent | Film formation aid | 2–8% |
| Defoamer | Process aid | 0.1–0.5% |
| Wetting Agent | Substrate adhesion | 0.2–1% |
Performance Advantages
| Feature | Comparative Benefit |
|---|---|
| VOC Content | <50 g/L vs. 300–500 g/L (solvent-borne) |
| Pot Life | 4–8 hrs vs. 1–2 hrs (solvent-borne) |
| Weatherability | ΔE <2 after 1.000 hrs QUV |
Safety & Handling
| Parameter | Requirement |
|---|---|
| Flash Point | >100°C (non-flammable) |
| Storage | 6–12 months @ 5–30°C |
| Freeze-Thaw Stability | 3–5 cycles |
Market Data
| Segment | Market Share | Growth (CAGR) |
|---|---|---|
| Industrial Coatings | 45% | 7.2% |
| Automotive | 30% | 8.5% |
| Wood | 25% | 6.0% |
Comparison with Solvent-borne
| Property | Waterborne | Solvent-borne |
|---|---|---|
| VOC Emission | 90% lower | High |
| Cure Speed | Slower | Faster |
| Film Quality | Slightly lower gloss | Superior leveling |
Key Benefits and Limitations
| Advantages | Limitations |
|---|---|
| Environmentally friendly | Longer drying time |
| Easy cleanup | Sensitive to humidity during cure |
| Low odor | Higher formulation complexity |
Summary
Waterborne hydroxyl acrylic resins enable sustainable coatings with robust performance, particularly where VOC compliance is critical. Ongoing advancements focus on faster curing and improved humidity resistance.
