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Excellent balance of mechanical strength and impact resistance for demanding composite applications.
Low styrene emission formulation supporting improved workplace safety and regulatory compliance.
Good compatibility with common glass fiber reinforcements and standard curing systems (MEKP, cobalt accelerators).
Consistent viscosity and reactivity profile enabling reliable processing in spray-up, hand lay-up, and centrifugal casting.
Enhanced weatherability and UV resistance when combined with appropriate surface veils or topcoats.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat decks, hulls, and structural panels.
Industrial grating, ducting, and corrosion-resistant process equipment.
Automotive under-hood components and lightweight structural parts.
Architectural cladding, roofing panels, and decorative FRP profiles.
| Chemical Type | Unsaturated polyester resin (orthophthalic-based) |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C, mPa·s) | 280–360 |
| Gel Time (with 1.0% MEKP, 25°C, min) | 18–24 |
| Reactive Diluent | Styrene (~38–42 wt%) |
| Density (25°C, g/cm³) | 1.11–1.14 |
| Acid Value (mg KOH/g) | 16–22 |
Q1: What are the key performance characteristics of ETERSET 2327M-2?
A: ETERSET 2327M-2 is a medium-viscosity, general-purpose unsaturated polyester resin designed for excellent gel time control, good mechanical strength development, and balanced reactivity in ambient-cure and low-energy UV-assisted applications. It offers good compatibility with common styrene monomers and typical free-radical initiators.
Q2: Which curing systems are recommended for optimal performance?
A: This resin is formulated to perform well with standard organic peroxide initiators such as MEKP (methyl ethyl ketone peroxide) and BPO (benzoyl peroxide), typically used at low concentrations. Cure profiles can be adjusted via initiator type, dosage, and ambient temperature—no specialized accelerators or cobalt-free systems are required for standard processing.
Q3: Is ETERSET 2327M-2 suitable for reinforced composites like fiberglass laminates?
A: Yes—it is widely used in hand lay-up, spray-up, and filament winding processes for structural and semi-structural FRP components. Its viscosity and reactivity profile support good wet-out of glass reinforcements and consistent interlaminar adhesion when properly cured.
Q4: How should ETERSET 2327M-2 be stored to maintain stability?
A: Store in tightly sealed containers in a cool, dry, and well-ventilated area away from direct sunlight, heat sources, and strong oxidizers. Under recommended conditions, shelf life is typically 6 months from date of manufacture. Avoid prolonged exposure to elevated temperatures or moisture during storage.
Q5: Can it be blended with other unsaturated polyester resins or additives?
A: Yes—ETERSET 2327M-2 demonstrates good miscibility with many conventional UP resins and common additives such as thixotropic agents, pigments, and flame retardants. However, compatibility testing is recommended prior to full-scale blending to confirm cure behavior, viscosity response, and final property retention.
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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
