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Excellent balance of mechanical strength and impact resistance for structural composite parts.
Low styrene emission formulation, supporting improved workplace safety and regulatory compliance.
Good compatibility with common glass fiber reinforcements and standard curing systems (MEKP).
Consistent viscosity profile enabling reliable spray-up, hand lay-up, and centrifugal casting processes.
High reactivity at ambient temperature, facilitating efficient production cycle times.
Fiberglass-reinforced plastic (FRP) tanks and vessels for chemical storage.
Marine components including boat hulls, decks, and bulkheads.
Automotive body panels and under-hood components requiring dimensional stability.
Industrial grating, ductwork, and corrosion-resistant architectural cladding.
Wind turbine nacelle covers and blade root sections.
| Chemical Type | Unsaturated polyester resin (bisphenol-A fumarate-based) |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C, mPa·s) | 350–450 |
| Gel Time (with 1.0% MEKP, 25°C, min) | 18–24 |
| Styrene Content (wt%) | 38–42 |
| Solid Content (wt%) | 62–65 |
| Flash Point (°C, closed cup) | 32–36 |
Q1: What are the primary end-use applications for ETERSET 2370?
A: ETERSET 2370 is widely used in fiberglass-reinforced plastic (FRP) manufacturing, including corrosion-resistant tanks and pipes, marine components, and structural panels. Its balanced reactivity and mechanical performance make it suitable for both spray-up and contact molding processes.
Q2: Which initiators and accelerators are commonly compatible with this resin?
A: ETERSET 2370 is typically cured using methyl ethyl ketone peroxide (MEKP) as the initiator, often in combination with cobalt-based accelerators. Compatibility may vary depending on ambient temperature and required gel time, so formulation adjustments should be validated during process development.
Q3: How does ETERSET 2370 compare to general-purpose unsaturated polyester resins in terms of viscosity and handling?
A: ETERSET 2370 offers a moderately low viscosity at room temperature, supporting good fiber wet-out and ease of processing in open-mold applications. It maintains sufficient thixotropy for vertical or overhead lay-up without excessive sagging, while remaining pumpable and mixable with standard FRP equipment.
Q4: Is ETERSET 2370 suitable for outdoor applications requiring UV resistance?
A: While ETERSET 2370 provides good baseline weatherability, long-term UV exposure may lead to surface chalking or gloss loss. For enhanced UV stability, it is recommended to use pigmented topcoats or incorporate UV absorbers and HALS stabilizers into the gel coat or surface layer.
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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
