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Excellent mechanical strength and dimensional stability after curing.
Good compatibility with standard styrene monomers and common accelerators.
Low viscosity for easy handling, impregnation, and fiber wet-out in composites.
Balanced reactivity enabling reliable gel time control under ambient and elevated conditions.
Superior chemical resistance to dilute acids, alkalis, and salt solutions.
Fiberglass-reinforced plastic (FRP) tanks and vessels for industrial corrosion protection.
Structural pultruded profiles including gratings, ladders, and cable trays.
Sheet molding compound (SMC) for automotive and electrical enclosures.
Centrifugal casting of pipes and fittings for water and wastewater infrastructure.
Hand lay-up and spray-up fabrication of marine decks, panels, and recreational equipment.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C) | 350–450 mPa·s |
| Acid Value | 18–22 mg KOH/g |
| Solid Content | ≈62–65 wt% (in styrene) |
| Gel Time (100 g, 2% MEKP, 25°C) | 12–18 minutes |
| Primary Applications | FRP, SMC, pultrusion, centrifugal casting, hand lay-up |
Q1: What are the key performance characteristics of ETERSET 2371?
A: ETERSET 2371 is a medium-viscosity, general-purpose unsaturated polyester resin offering balanced mechanical strength, good chemical resistance, and reliable gel time control. It exhibits excellent compatibility with common styrene monomers and provides consistent cure behavior under ambient or elevated temperature conditions.
Q2: Which curing agents are typically recommended for use with this resin?
A: ETERSET 2371 is commonly cured using methyl ethyl ketone peroxide (MEKP) initiators at ambient temperatures, or benzoyl peroxide (BPO) for elevated-temperature processing. Catalyst selection and dosage depend on desired gel time, ambient conditions, and final part requirements — always verify compatibility and safety guidelines before use.
Q3: Is ETERSET 2371 suitable for reinforced composite applications such as fiberglass laminates?
A: Yes — it is widely used in hand lay-up, spray-up, and filament winding processes with glass fiber reinforcements. Its formulation supports good wet-out of fibers and delivers robust interlaminar adhesion and dimensional stability in cured laminates.
Q4: How should ETERSET 2371 be stored to maintain optimal performance?
A: Store in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible materials. Prolonged exposure to elevated temperatures or moisture may affect viscosity and reactivity. For best results, use within six months of receipt under recommended storage conditions.
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E-mail: wangxingqiang@ericwchem.com
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