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High reactivity with styrene for rapid gelation and efficient production cycles.
Excellent mechanical strength and dimensional stability in cured composites.
Good compatibility with common accelerators and inhibitors for precise process control.
Low viscosity enabling superior fiber wet-out and reduced air entrapment.
Consistent batch-to-batch performance meeting stringent quality assurance standards.
Fiberglass-reinforced plastic (FRP) tanks and vessels for chemical storage.
Industrial corrosion-resistant linings and secondary containment systems.
Pultruded profiles for structural supports and utility poles.
Sheet molding compound (SMC) components in transportation and infrastructure.
Centrifugally cast pipes for wastewater and aggressive media handling.
| Chemical Type | Unsaturated polyester resin |
| Product Form | Liquid |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C) | 350–450 mPa·s |
| Acid Value | 18–22 mg KOH/g |
| Reactive Diluent | Styrene (38–42 wt%) |
| Density (25°C) | 1.11–1.13 g/cm³ |
| Storage Stability | ≥6 months at ≤25°C in sealed containers |
Q1: What is the primary function of LH818-05 in polyester-based coating systems?
A: LH818-05 is a specialty polyester resin designed to act as a reactive binder and film-forming component, enhancing crosslink density, flexibility, and chemical resistance in thermosetting polyester coatings—particularly for coil and appliance applications.
Q2: Is LH818-05 compatible with common crosslinkers such as TGIC or hydroxyalkylamide (HAA)?
A: Yes, LH818-05 is formulated for compatibility with standard amino crosslinkers including TGIC and HAA derivatives, enabling robust cure profiles and balanced performance in powder and liquid polyester systems.
Q3: How does LH818-05 contribute to weathering and UV resistance in outdoor applications?
A: As a saturated aromatic-aliphatic polyester, LH818-05 provides inherent resistance to UV degradation and chalking, supporting long-term gloss retention and color stability—especially when combined with appropriate UV absorbers and HALS stabilizers.
Q4: Can LH818-05 be used in both solvent-borne and high-solids liquid coating formulations?
A: Yes, LH818-05 offers good solubility in common aromatic and ester solvents, making it suitable for conventional solvent-borne systems as well as high-solids formulations—subject to viscosity and reactivity adjustments during formulation development.
Q5: What handling precautions should be observed when processing LH818-05?
A: Standard industrial hygiene practices apply: use in well-ventilated areas, avoid prolonged skin contact, and wear appropriate PPE (gloves, eye protection). As with most polyester resins, thermal decomposition above recommended processing temperatures may release acidic vapors.
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E-mail: wangxingqiang@ericwchem.com
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