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Excellent balance of mechanical strength and impact resistance for structural composite parts.
Low viscosity (250–350 cP at 25°C) enabling superior fiber wet-out and efficient resin transfer molding (RTM) processing.
Good heat distortion temperature (HDT ≈ 85–90°C) after post-curing, supporting mid-temperature service applications.
Consistent reactivity profile with standard MEKP initiators, ensuring reliable gel time control in ambient and warm-cure operations.
High solids content (>99%) with low styrene emission potential, contributing to improved workplace safety and VOC compliance.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Automotive body panels and under-hood components requiring dimensional stability and surface finish.
Marine deck structures, hull liners, and recreational boat components.
Industrial grating, cable trays, and corrosion-resistant ductwork.
Pultruded profiles for construction reinforcement and infrastructure applications.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C) | 250–350 cP |
| Gel Time (with 1.0% MEKP, 25°C) | 12–18 minutes |
| Reactive Diluent | Styrene (35–40% w/w) |
| Solids Content | ≥99% |
| Density (25°C) | 1.11–1.13 g/cm³ |
Q1: What are the key performance characteristics of ETERSET 2426?
A: ETERSET 2426 is a medium-viscosity, styrene-containing unsaturated polyester resin designed for excellent mechanical strength, good chemical resistance, and balanced cure speed. It offers favorable handling properties in open-mold and spray-up processes, with reliable compatibility with common peroxide initiators and low-profile additives.
Q2: Which curing agents are typically recommended for this resin?
A: ETERSET 2426 is compatible with standard methyl ethyl ketone peroxide (MEKP) formulations. Cure profiles can be adjusted using cobalt accelerators or low-temperature initiators depending on ambient conditions and process requirements. Always conduct small-scale trials to optimize initiator type and dosage for specific applications.
Q3: Can ETERSET 2426 be used in marine or corrosion-resistant laminates?
A: Yes — it is widely employed in fiberglass-reinforced plastic (FRP) components for marine, chemical storage, and industrial environments where moderate resistance to water, acids, and solvents is required. For enhanced corrosion resistance, it is often combined with surface veils, barrier coats, or vinyl ester top layers in hybrid systems.
Q4: How should ETERSET 2426 be stored to maintain stability?
A: Store in original sealed containers at temperatures between 15°C and 25°C, away from direct sunlight, heat sources, and strong oxidizers. Avoid prolonged exposure to moisture or contamination. Under proper storage conditions, shelf life is typically 6 months from date of manufacture.
Q5: Is ETERSET 2426 suitable for gel coat formulations?
A: While primarily formulated for structural laminating, ETERSET 2426 can serve as a base resin in certain gel coat systems when modified with appropriate thixotropic agents, pigments, and surfacing additives. However, dedicated gel coat resins are generally preferred for optimal surface finish, UV stability, and sandability.
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E-mail: wangxingqiang@ericwchem.com
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