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Excellent mechanical strength and dimensional stability after curing.
Good compatibility with standard styrene monomers and common free-radical initiators.
Low viscosity for enhanced fiber wet-out and improved processability in RTM and hand lay-up.
Superior weather resistance and UV stability when combined with suitable additives.
Consistent batch-to-batch performance ensured by Chang Chun’s stringent quality control system.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat hulls, decks, and structural laminates.
Automotive body panels and under-hood composite parts.
Industrial grating, ductwork, and corrosion-resistant piping systems.
Wind turbine blade sub-components and nacelle enclosures.
| Chemical Type | Unsaturated polyester resin (orthophthalic-based) |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C) | 400–600 mPa·s |
| Acid Value | 18–22 mg KOH/g |
| Gel Time (with 1% MEKP at 25°C) | 12–18 minutes |
| Styrene Content | 38–42 wt% |
| Storage Stability (25°C) | ≥6 months in sealed container |
Q1: What are the primary end-use applications for ETERSET 2328?
A: ETERSET 2328 is commonly employed in structural and semi-structural composite manufacturing, including pultrusion profiles, filament-wound tanks and pipes, and reinforced panels where balanced mechanical performance, good gel time control, and moderate heat resistance are required.
Q2: How does ETERSET 2328 compare to general-purpose unsaturated polyester resins in terms of reactivity and processing window?
A: ETERSET 2328 offers a moderately extended pot life and controlled gel profile compared to high-reactivity resins, supporting stable processing in continuous operations like pultrusion while maintaining acceptable cure speed under standard peroxide initiation conditions.
Q3: Which initiators are typically recommended for use with ETERSET 2328?
A: Standard organic peroxides such as methyl ethyl ketone peroxide (MEKP) are widely used. Selection and dosage depend on processing method, ambient temperature, and desired gel/cure schedule—formulators should conduct small-scale trials to optimize initiator type and concentration.
Q4: Is ETERSET 2328 suitable for applications requiring low styrene emission during processing?
A: While ETERSET 2328 is not classified as a low-styrene resin, its formulation supports compatibility with common styrene reduction strategies—including reactive diluents and vinyl toluene substitution—when aligned with regulatory and safety requirements of the end-use process.
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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
