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Excellent balance of mechanical strength and impact resistance for structural composite parts.
Good compatibility with standard MEKP (methyl ethyl ketone peroxide) initiators and low-reactivity accelerators.
Low styrene emission during processing, supporting improved workplace safety and regulatory compliance.
Consistent batch-to-batch viscosity and reactivity, ensuring reliable gel time control in open-mold and RTM processes.
Superior adhesion to fiberglass reinforcements and mineral fillers without requiring special surface treatment.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat hulls, decks, and bulkheads.
Automotive body panels and under-hood non-structural parts.
Industrial grating, ductwork, and corrosion-resistant architectural cladding.
Wind turbine nacelle covers and blade root sections requiring dimensional stability.
| Chemical Type | Unsaturated polyester resin (orthophthalic-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 at 25°C, min) | 18–24 |
| Styrene Content (wt%) | 38–42 |
| Density (25°C, g/cm³) | 1.11–1.13 |
| Acid Value (mg KOH/g) | 16–20 |
Q1: What are the primary end-use applications for ETERSET 2319?
A: ETERSET 2319 is commonly used in fiberglass-reinforced plastic (FRP) applications such as corrosion-resistant tanks, pipes, and structural profiles, as well as in sheet molding compound (SMC) and bulk molding compound (BMC) formulations for automotive and industrial components.
Q2: How does ETERSET 2319 compare to standard orthophthalic resins in terms of mechanical performance?
A: ETERSET 2319 offers enhanced toughness and improved flexural strength relative to conventional orthophthalic unsaturated polyester resins, owing to its modified molecular structure—making it particularly suitable for applications requiring higher impact resistance and dimensional stability.
Q3: Which initiators and accelerators are typically compatible with ETERSET 2319?
A: The resin is compatible with standard organic peroxide initiators such as methyl ethyl ketone peroxide (MEKP), and works effectively with cobalt-based accelerators. Optimal curing profiles depend on ambient conditions and formulation design, and should be validated through small-scale trials.
Q4: Is ETERSET 2319 suitable for low-VOC or high-solids formulations?
A: Yes—ETERSET 2319 exhibits good reactivity and viscosity characteristics that support formulating with reduced styrene content or alternative reactive diluents, helping manufacturers meet evolving environmental and occupational health requirements without compromising processability.
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E-mail: wangxingqiang@ericwchem.com
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