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High reactivity with standard peroxide initiators for rapid gelation and cycle time reduction.
Excellent mechanical strength and impact resistance in cured composites.
Good compatibility with common fillers, pigments, and reinforcing fibers (e.g., glass fiber).
Low styrene emission profile supporting improved workplace safety and regulatory compliance.
Consistent batch-to-batch reproducibility ensuring reliable process control in industrial manufacturing.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Industrial corrosion-resistant linings and secondary containment systems.
Lightweight structural profiles for infrastructure and transportation components.
Marine deck and hull laminates requiring dimensional stability and weather resistance.
Wind turbine blade sub-components and nacelle housings.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to slightly hazy, pale yellow liquid |
| Viscosity (25 °C) | 350–550 mPa·s |
| Acid Value | 18–24 mg KOH/g |
| Reactive Diluent | Styrene (~38–42 wt%) |
| Density (25 °C) | 1.10–1.14 g/cm³ |
| Flash Point (PMCC) | 35–40 °C |
Q1: What is the primary function of Evonik S1401 in polyester resin systems?
A: Evonik S1401 functions as a reactive diluent and viscosity modifier, enabling improved processability of unsaturated polyester resins without compromising crosslink density or final mechanical performance.
Q2: Is S1401 compatible with standard free-radical curing systems?
A: Yes, S1401 is fully compatible with conventional peroxide-initiated free-radical polymerization systems commonly used for unsaturated polyester resins, including MEKP and BPO-based initiators.
Q3: How does S1401 compare to styrene in terms of volatility and handling safety?
A: S1401 exhibits significantly lower volatility than styrene, resulting in reduced VOC emissions during processing and improved workplace exposure profiles—making it a preferred alternative where regulatory or operational constraints limit styrene use.
Q4: Can S1401 be used in gel coat formulations?
A: Yes, S1401 is suitable for gel coat applications where enhanced surface quality, reduced styrene odor, and improved sag resistance are desired—typically used at low concentrations alongside standard polyester binders.
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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
