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High reactivity with standard MEKP initiators for rapid gelation and efficient production cycles.
Excellent mechanical strength and impact resistance after full cure.
Good chemical resistance to dilute acids, alkalis, and common solvents.
Low styrene emission profile, supporting improved workplace air quality and regulatory compliance.
Consistent batch-to-batch viscosity and reactivity for reliable process control.
Fiberglass-reinforced plastic (FRP) tanks and vessels for water and wastewater treatment.
Corrosion-resistant ducting and scrubber components in industrial exhaust systems.
Marine deck and hull laminates requiring dimensional stability and moisture resistance.
Automotive under-hood composite parts exposed to moderate thermal and chemical stress.
Industrial grating and structural panels for chemical processing facilities.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C, mPa·s) | 350–450 |
| Acid Value (mg KOH/g) | 18–22 |
| Gel Time (with 1.0% MEKP, 25°C, min) | 12–18 |
| Solid Content (% w/w) | 99.5–100.0 |
| Styrene Content (% w/w) | 38–42 |
Q1: What is the primary application of Chan Chem EL-6600 Polyester Resin?
A: EL-6600 is a reactive unsaturated polyester resin designed primarily for use in high-performance thermoset composites, including pultrusion, filament winding, and sheet molding compound (SMC) formulations where enhanced mechanical strength, dimensional stability, and chemical resistance are required.
Q2: Is EL-6600 compatible with standard free-radical initiators and accelerators?
A: Yes, EL-6600 is formulated to respond effectively to common peroxide initiators such as MEKP and BPO, and works well with cobalt-based accelerators. Cure profile and pot life can be adjusted based on initiator type, concentration, and ambient conditions.
Q3: How does EL-6600 perform in terms of moisture resistance and thermal stability?
A: EL-6600 exhibits improved hydrolytic stability compared to conventional orthophthalic resins, supporting long-term performance in humid or intermittently wet environments. Its cured network also provides good thermal resistance, maintaining structural integrity under continuous service temperatures up to approximately 80–100 °C.
Q4: Can EL-6600 be blended with other resins or additives?
A: EL-6600 is generally compatible with styrene monomer and may be modified with reactive diluents, fillers, and fiber reinforcements. Blending with vinyl ester or epoxy resins is possible but requires compatibility testing to ensure homogeneous cure behavior and final property retention.
Q5: What safety and handling precautions should be observed during processing?
A: As with all unsaturated polyester resins, EL-6600 requires adequate ventilation, skin protection, and eye protection during handling. Uncured resin contains reactive monomers and inhibitors; avoid prolonged skin contact and inhalation of vapors or aerosols. Always consult the Safety Data Sheet (SDS) before use.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
