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High hydroxyl functionality for robust crosslinking with isocyanates and melamine resins.
Excellent compatibility with common solvent-borne automotive and industrial coating systems.
Good pigment wetting and dispersion stability in high-solids formulations.
Superior gloss retention and UV resistance in topcoat applications.
Low viscosity at high solids content, enabling efficient spray application and reduced VOC emissions.
Automotive OEM clearcoats and basecoats.
Industrial maintenance coatings for metal substrates.
General-purpose high-performance protective coatings.
Refinish coatings requiring fast cure and excellent film integrity.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow liquid |
| Solvent System | Aromatic-free (e.g., ester/ketone blend) |
| Solids Content (wt%) | 60 ± 2% |
| Hydroxyl Value (mg KOH/g) | 85–95 |
| Acid Value (mg KOH/g) | < 5 |
| Viscosity (25°C, mPa·s) | 3,000–5,000 |
Q1: What is the primary function of Alcreset 7133 in coating formulations?
A: Alcreset 7133 serves as a hydroxyl-functional acrylic resin that acts as a reactive binder component in two-component polyurethane and polyester-based coating systems. It contributes to film formation, crosslink density, and enhances mechanical properties such as hardness, flexibility, and chemical resistance.
Q2: Is Alcreset 7133 compatible with common isocyanate crosslinkers?
A: Yes, Alcreset 7133 is specifically designed for compatibility with aliphatic and aromatic isocyanate crosslinkers, including HDI-based trimer and IPDI-based adducts. Its hydroxyl functionality ensures efficient urethane bond formation under standard curing conditions.
Q3: How does Alcreset 7133 compare to conventional polyester or alkyd hydroxyl resins in terms of weathering performance?
A: As an acrylic-based hydroxyl resin, Alcreset 7133 offers superior UV stability and long-term gloss retention compared to many polyester or alkyd alternatives. Its carbon–carbon backbone provides enhanced resistance to chalking, yellowing, and degradation under outdoor exposure.
Q4: Can Alcreset 7133 be used in low-VOC or high-solids coating systems?
A: Yes — Alcreset 7133 is formulated to support medium-to-high solids applications and can be integrated into low-VOC coating architectures when paired with appropriate solvents and crosslinkers. Its viscosity and reactivity profile allow for good formulation flexibility without compromising pot life or cure response.
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E-mail: wangxingqiang@ericwchem.com
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