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High reactivity with standard MEKP initiators for rapid gelation and efficient production cycles.
Excellent thixotropic stability—minimizes pigment settling and ensures uniform dispersion in filled systems.
Superior weather resistance and UV stability, maintaining gloss and color integrity under outdoor exposure.
Low styrene emission formulation supports improved workplace safety and regulatory compliance (VOC < 350 g/L).
Balanced toughness and hardness—delivers impact resistance without sacrificing surface hardness or sandability.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine deck laminates and boat hulls requiring high moisture resistance and mechanical durability.
Architectural cladding panels and façade components exposed to harsh environmental conditions.
Industrial grating and walkway systems for corrosion-prone environments.
Automotive aftermarket body panels and custom composite enclosures.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C, mPa·s) | 450–650 |
| Acid Value (mg KOH/g) | 16–22 |
| Gel Time (with 1.0% MEKP, 25°C, min) | 18–24 |
| Density (25°C, g/cm³) | 1.12–1.15 |
| Styrene Content (wt%) | 38–42 |
Q1: What is the primary application field for EL-5510?
A: EL-5510 is a medium-reactivity unsaturated polyester resin designed primarily for structural composite applications, including pultrusion, filament winding, and reinforced laminates where balanced mechanical performance and processability are required.
Q2: Is EL-5510 compatible with common peroxide initiators?
A: Yes, EL-5510 is formulated to be compatible with standard organic peroxides such as methyl ethyl ketone peroxide (MEKP) and benzoyl peroxide (BPO), allowing flexibility in cure system selection based on processing temperature and gel time requirements.
Q3: How does EL-5510 perform in terms of moisture resistance and dimensional stability?
A: EL-5510 exhibits good hydrolytic stability and low water absorption characteristics typical of high-performance orthophthalic polyester resins, contributing to reliable long-term dimensional integrity in humid or cyclic wet-dry environments.
Q4: Can EL-5510 be used in combination with glass fiber reinforcements?
A: Yes, EL-5510 is widely used with E-glass reinforcements—including rovings, mats, and woven fabrics—and provides strong interfacial adhesion and efficient wet-out when properly catalyzed and processed.
Q5: What safety and handling precautions should be observed?
A: As with all unsaturated polyester resins, EL-5510 requires handling in well-ventilated areas, use of appropriate PPE (gloves, eye protection, respirator if aerosol generation occurs), and avoidance of skin contact. 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
