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High reactivity with standard peroxide initiators for rapid gelation and efficient production cycles.
Excellent compatibility with common fillers, pigments, and glass fiber reinforcements.
Good mechanical strength and dimensional stability in cured laminates.
Low styrene emission profile supporting improved workplace safety and regulatory compliance.
Consistent batch-to-batch performance ensured by Evonik’s stringent quality control standards.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Industrial corrosion-resistant linings and secondary containment systems.
Pultruded profiles for structural components in infrastructure and energy sectors.
Sheet molding compound (SMC) formulations for automotive under-hood parts.
Marine deck and hull components requiring balanced toughness and weather resistance.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25°C) | 350–550 mPa·s |
| Acid Value | 18–24 mg KOH/g |
| Styrene Content | 38–42 wt.% |
| Density (25°C) | 1.11–1.14 g/cm³ |
| Reactivity Profile | Medium–high (optimized for MEKP-initiated cure) |
Q1: What is the primary function of EP112N in polyester resin systems?
A: EP112N is a reactive liquid polyester resin designed to serve as a viscosity modifier and reactive diluent in unsaturated polyester (UPE) formulations. It helps improve processability—especially in casting, pultrusion, and filament winding—while maintaining crosslink density and final mechanical performance.
Q2: Is EP112N compatible with standard UPE resins and common initiators?
A: Yes, EP112N exhibits broad compatibility with conventional unsaturated polyester resins and is fully miscible with styrene-based systems. It reacts efficiently with standard peroxide initiators such as MEKP and BPO under typical curing conditions used in composites manufacturing.
Q3: How does EP112N affect gel time and cure profile?
A: EP112N generally extends gel time slightly compared to higher-reactivity diluents, offering improved working time for complex molding operations. Its reactivity is balanced to support controlled cure progression without significantly delaying final hardness development.
Q4: Can EP112N be used in low-VOC or styrene-reduced formulations?
A: Yes—EP112N is a low-volatility, styrene-free reactive diluent, making it suitable for formulating reduced-VOC polyester systems. It contributes to lower emissions during processing while retaining good wet-out and interfacial adhesion in fiber-reinforced composites.
Q5: What storage and handling precautions should be observed?
A: Store EP112N in tightly sealed containers under dry, cool conditions (below 30 °C) and protect from moisture, direct sunlight, and strong oxidizing agents. As with all reactive resins, avoid prolonged skin contact and ensure adequate ventilation during handling.
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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
