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High reactivity with standard MEKP initiators for rapid room-temperature gelation.
Excellent thixotropic stability—minimizes sagging in vertical and overhead applications.
Low styrene emission profile, supporting improved workplace air quality and regulatory compliance.
Balanced toughness and hardness, delivering superior impact resistance without brittleness.
Consistent batch-to-batch reproducibility, ensuring reliable process control in high-volume production.
Fiberglass-reinforced plastic (FRP) panels for architectural cladding and roofing systems.
Marine deck cores and hull laminates requiring moisture resistance and dimensional stability.
Industrial corrosion-resistant tanks and secondary containment liners.
Transportation components including bus interiors, truck body panels, and rail interior trim.
Custom-molded composite parts for agricultural equipment housings and enclosures.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Viscosity (25°C, mPa·s) | 350–450 |
| Acid Value (mg KOH/g) | 16–20 |
| Reactive Diluent | Styrene (~38–42 wt%) |
| Density (25°C, g/cm³) | 1.07–1.09 |
| Flash Point (°C, closed cup) | 32–36 |
Q1: What is the primary application field for EL-3310?
A: EL-3310 is a specialty unsaturated polyester resin designed primarily for high-performance gel coats and surface layers in fiberglass-reinforced plastic (FRP) composites, especially where enhanced surface hardness, gloss retention, and resistance to weathering and microcracking are required.
Q2: How does EL-3310 differ from standard orthophthalic polyester resins?
A: EL-3310 features a modified molecular architecture that delivers improved flexibility-to-stiffness balance, reduced exotherm during cure, and superior compatibility with low-VOC styrene reduction systems—making it well-suited for demanding gel coat formulations where crack resistance and post-cure dimensional stability are critical.
Q3: What curing agents are recommended for use with EL-3310?
A: EL-3310 is compatible with standard organic peroxide initiators such as methyl ethyl ketone peroxide (MEKP) and benzoyl peroxide (BPO), as well as low-temperature and inhibited cure systems. Optimal catalyst selection depends on processing conditions, ambient temperature, and desired gel time—formulators should conduct small-scale trials to confirm performance.
Q4: Is EL-3310 suitable for marine-grade gel coats?
A: Yes—EL-3310 is widely used in marine gel coat formulations due to its excellent water resistance, UV stability, and ability to maintain surface integrity under prolonged exposure to saltwater and thermal cycling. Final qualification requires full system testing per end-use requirements.
Q5: Can EL-3310 be blended with other resins or additives?
A: EL-3310 exhibits good miscibility with common vinyl ester resins, acrylic modifiers, and select rheology control additives. However, compatibility with reactive diluents or functional monomers should be verified experimentally, as unintended side reactions or phase separation may occur.
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E-mail: wangxingqiang@ericwchem.com
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