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High reactivity with standard peroxide initiators, enabling fast gel time and efficient production cycles.
Excellent mechanical strength and dimensional stability in cured laminates, suitable for structural applications.
Good resistance to water, weak acids, and alkaline environments after full curing.
Low viscosity (at 25°C) for superior fiber wet-out and ease of processing in hand lay-up and spray-up operations.
Consistent batch-to-batch quality with tightly controlled acid number and styrene content.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine hulls, decks, and interior components requiring balanced toughness and corrosion resistance.
Industrial grating, walkways, and corrosion-resistant ducting systems.
Automotive under-hood components and non-structural body panels.
Wind turbine blade root sections and nacelle covers where moderate thermal performance is required.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| Product Form | Liquid, ready-to-use solution |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C) | 350–450 cP |
| Acid Number | 16–20 mg KOH/g |
| Styrene Content | 38–42 wt% |
| Density (25°C) | 1.10–1.13 g/cm³ |
| Gel Time (with 1.0% MEKP, 25°C) | 8–12 minutes |
Q1: What are the key handling and storage recommendations for ETERSET 2309M?
A: Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and strong oxidizers. Keep containers tightly sealed to prevent moisture ingress and premature viscosity increase. Avoid prolonged exposure to ambient humidity during handling.
Q2: Which types of initiators and accelerators are commonly used with ETERSET 2309M?
A: This resin is typically cured using organic peroxides such as methyl ethyl ketone peroxide (MEKP) or benzoyl peroxide (BPO), often in combination with cobalt-based accelerators. Compatibility and cure profile should be verified experimentally based on specific application requirements and processing conditions.
Q3: Is ETERSET 2309M suitable for marine or outdoor applications?
A: Yes — it exhibits good resistance to water, weathering, and UV degradation when properly formulated with UV stabilizers and pigments. It is widely used in fiberglass-reinforced composites for marine hulls, decks, and architectural panels exposed to outdoor environments.
Q4: How does ETERSET 2309M compare to general-purpose unsaturated polyester resins in terms of mechanical performance?
A: ETERSET 2309M is engineered for enhanced toughness and dimensional stability, offering improved flexural strength and impact resistance compared to standard orthophthalic resins. Its molecular structure supports better fiber-matrix adhesion in reinforced laminates, contributing to overall composite durability.
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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
