This water-based hydroxylated acrylic dispersion is designed for formulating high-performance water-based 2K polyurethane topcoats for various metal substrates. It is compatible with both solvent-based and water-based isocyanate curing agents.
Featuring a hydroxyl content (WEI) of 3.9%, the resin performs exceptionally well in high-temperature, low-humidity environments. It also offers cost-effective compatibility with solvent-based curing agents.
Physical Property
| Item | Value | Detection method |
| Appearance | Milky white liquid | Visual inspection |
| Non-volatile matter (%) | 44±2 | GB/T 1725-2007 |
| Viscosity (mPa·S) | 200-3000 | GB/T 21059-2007 |
| PH | 7.5~8.5 | GB/T 9724-2007 |
| hydroxyl value(%) | 3.9 | Based on solids |
The viscosity of the product is affected by the pH value, as the pH value increases, the viscosity and thixotropy will increase.
Key Features:
Excellent compatibility with solvent-based isocyanate curing agents
Outstanding water resistance
Extended application period (pot life).
Application:
Prepare Curing Agent: Dilute the solvent-based curing agent to 60-70% solids using a suitable co-solvent (e.g., BGA, PGDA, or PMA+DBE blend [1:2 ratio]).
Mix Components: Combine Component A (main agent) and the diluted Component B (curing agent). Mix thoroughly using a pneumatic or electric stirrer.
Control Water Dilution: Add water cautiously. Dilution should not exceed 10% by weight of Component A; 5% is recommended. Higher dilution may reduce gloss.
Grinding Restriction: Due to inherent instability risks during grinding that can compromise product stability, this resin is not recommended for use in color paste grinding processes.
This resin is compatible with solvent-based curing agents.
The paint film properties listed below were measured using formulations incorporating these solvent curing agents.
| Item | WL-AD3940/TPA100 (Diluted by BGA) |
| 25℃/35% outdoor corridor Under breeze conditions | 60min |
| Surface drying time 14.5℃/60% outdoor corridor Under medium and high humidity conditions | 120min |
| Water resistance at room temperature | 15 days |
| Pencil hardness (baking) | H |
| Bending resistance (mm) | <1 |
| Impact (front/back cm kg) | 50/50 |
| Effective opening period at 35℃ | 4h |
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Waterborne Hydroxylated Polyacrylic Resin Suitable For Large-scale Component Construction Images
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