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High reactivity with standard MEKP initiators for rapid gelation and efficient production cycles.
Excellent mechanical strength and dimensional stability after curing, suitable for structural composite parts.
Good compatibility with common fillers (e.g., calcium carbonate, talc) and fiber reinforcements (glass fiber, chopped strand mat).
Low viscosity at ambient temperature, enabling easy handling, impregnation, and mold filling without excessive dilution.
Consistent batch-to-batch performance ensured by Chang Chun’s stringent quality control and ISO-certified manufacturing.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat hulls, decks, and fenders.
Automotive under-hood and exterior non-structural panels.
Industrial grating, ducting, and corrosion-resistant linings.
Architectural cladding, decorative panels, and translucent roofing systems.
| Chemical Type | Orthophthalic unsaturated polyester resin |
| 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 wt% MEKP, 25°C) | 8–12 minutes |
| Solid Content (wt%) | 99.5–100.0 |
| Density (25°C, g/cm³) | 1.12–1.15 |
| Reactive Diluent | Styrene (35–38 wt%) |
Q1: What are the key performance characteristics of ETERSET 2516P?
A: ETERSET 2516P is a medium-reactivity unsaturated polyester resin offering balanced mechanical strength, good dimensional stability, and excellent compatibility with common fiberglass reinforcements. It delivers consistent gel time and cure profile under standard room-temperature or elevated-temperature curing conditions, making it well-suited for hand lay-up, spray-up, and filament winding processes.
Q2: Which initiators and accelerators are typically recommended for use with this resin?
A: ETERSET 2516P is compatible with standard methyl ethyl ketone peroxide (MEKP) initiators. Acceleration is commonly achieved using cobalt naphthenate or cobalt octoate at low concentrations; dosage depends on ambient temperature, required gel time, and final part specifications. Always conduct small-scale trials to optimize the initiator/accelerator system for your specific process.
Q3: Can ETERSET 2516P be used in outdoor applications requiring UV resistance?
A: While ETERSET 2516P provides good baseline weatherability, it is not inherently UV-stabilized. For long-term outdoor exposure, integration of UV absorbers (e.g., benzotriazole derivatives) and surface protection—such as gel coats or topcoats with enhanced UV screening—is strongly recommended to prevent chalking, gloss loss, and surface degradation.
Q4: How should ETERSET 2516P be stored to maintain optimal shelf life and reactivity?
A: Store in tightly sealed containers in a cool, dry, and well-ventilated area away from direct sunlight, heat sources, and strong oxidizers. Recommended storage temperature is between 15°C and 25°C. Prolonged exposure to temperatures above 30°C or repeated freeze-thaw cycles may affect viscosity and reactivity, so stable ambient conditions are advised for best performance retention.
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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
