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High reactivity with standard peroxide initiators for rapid gelation and cycle time reduction.
Excellent compatibility with common glass fiber reinforcements and mineral fillers.
Good weather resistance and UV stability in cured laminates.
Low styrene emission profile supporting improved workplace safety and regulatory compliance.
Balanced viscosity for optimal wet-out and impregnation in spray-up and contact molding processes.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine deck and hull components requiring corrosion resistance.
Transportation interior panels and structural parts for buses and rail vehicles.
Industrial grating, ducting, and corrosion-resistant linings.
Architectural cladding and façade elements exposed to outdoor environments.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C, mPa·s) | 350–550 |
| Reactive Diluent | Styrene (~38–42 wt%) |
| Density (25°C, g/cm³) | 1.11–1.14 |
| Acid Value (mg KOH/g) | 12–18 |
| Primary Applications | FRP manufacturing via contact molding, spray-up, and filament winding |
Q1: What is the primary function of LH748-02 in polyester-based coating systems?
A: LH748-02 is a reactive polyester resin designed to act as a crosslinking co-resin or modifier, enhancing film hardness, flexibility balance, and chemical resistance in thermosetting polyester–triglycidyl isocyanurate (TGIC) or hydroxyalkylamide (HAA) powder coatings.
Q2: Is LH748-02 suitable for outdoor applications?
A: Yes — due to its saturated polyester backbone and optimized molecular structure, LH748-02 contributes to excellent UV stability and weather resistance when formulated into high-performance architectural or industrial maintenance coatings.
Q3: How does LH748-02 differ from standard polyester resins used in powder coatings?
A: Unlike conventional general-purpose polyesters, LH748-02 features tailored acid value, viscosity, and glycol composition to support improved flow, reduced orange peel, and enhanced reactivity with common crosslinkers — particularly in low-cure or high-gloss formulations.
Q4: Can LH748-02 be blended with other resin types?
A: Yes — it demonstrates good compatibility with acrylics, epoxies, and certain hybrid polyester–epoxy systems; however, compatibility and cure response should be verified experimentally in the target formulation before full-scale use.
Q5: What storage conditions are recommended for LH748-02?
A: Store in original sealed containers at temperatures between 5 °C and 30 °C, away from direct sunlight and moisture. Prolonged exposure to high humidity or elevated temperatures may affect viscosity and reactivity over time.
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E-mail: wangxingqiang@ericwchem.com
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