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Excellent balance of mechanical strength and impact resistance for structural composite parts.
Good reactivity with standard MEKP initiators, enabling reliable room-temperature and elevated-temperature curing.
Low viscosity (250–350 mPa·s at 25°C) for enhanced fiber wet-out and improved processability in RTM, pultrusion, and hand lay-up.
Superior weathering resistance and UV stability due to optimized molecular structure and inhibitor package.
Consistent batch-to-batch quality with strict raw material control and ISO-certified manufacturing.
Fiberglass-reinforced panels (FRP) for architectural cladding and façade systems.
Marine components including boat hulls, decks, and interior fittings.
Transportation parts such as truck body panels, bus shelters, and railway interior trim.
Industrial tanks and corrosion-resistant ducting for chemical handling environments.
Wind energy: non-structural nacelle covers and blade fairings.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| Product Form | Liquid, solvent-free |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C) | 250–350 mPa·s |
| Gel Time (with 1.0% MEKP, 25°C) | 8–12 minutes |
| Reactive Diluent | Styrene (35–40 wt%) |
| Acid Value | 16–20 mg KOH/g |
| Non-Volatile Content | 60–63 wt% |
Q1: What are the primary curing systems compatible with ETERSET 2433?
A: ETERSET 2433 is designed for free-radical polymerization and is typically cured using organic peroxides such as methyl ethyl ketone peroxide (MEKP) or benzoyl peroxide (BPO), often in combination with cobalt-based accelerators. Cure profiles can be adjusted by selecting appropriate initiator types and concentrations based on ambient conditions and processing requirements.
Q2: Is ETERSET 2433 suitable for fiberglass-reinforced composites used in outdoor applications?
A: Yes — ETERSET 2433 offers good weather resistance and mechanical retention after post-cure, making it well-suited for structural and semi-structural FRP components exposed to UV, moisture, and temperature fluctuations, including marine and transportation applications.
Q3: How does ETERSET 2433 compare to general-purpose unsaturated polyester resins in terms of viscosity and gel time control?
A: ETERSET 2433 exhibits a moderately low initial viscosity and excellent thixotropic response when formulated with appropriate rheology modifiers, enabling improved fiber wet-out and reduced sag in vertical layups. Its reactivity allows flexible gel time tuning across a broad range of temperatures and catalyst levels without compromising final crosslink density.
Q4: Can ETERSET 2433 be blended with other resins or additives to modify performance?
A: Yes — it is commonly modified with styrene-reducing monomers, low-profile additives, or impact modifiers to enhance surface finish, reduce shrinkage, or improve toughness. Compatibility with standard UPR additives (e.g., fillers, pigments, flame retardants) has been validated in typical composite formulations.
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E-mail: wangxingqiang@ericwchem.com
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