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High reactivity with standard peroxide initiators for rapid gelation and cycle time reduction.
Excellent mechanical strength and dimensional stability in cured composites.
Good compatibility with common glass fiber reinforcements and fillers.
Low styrene emission profile supporting improved workplace safety and regulatory compliance.
Consistent batch-to-batch reproducibility ensured through Evonik’s stringent quality control.
Fiberglass-reinforced plastic (FRP) tanks and vessels for chemical storage.
Industrial grating and corrosion-resistant structural profiles.
Wind turbine blade components requiring balanced toughness and processability.
Automotive under-hood components exposed to moderate thermal and chemical stress.
Marine deck and hull parts where moisture resistance and impact performance are critical.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid, ready-to-use |
| Appearance | Clear to pale yellow viscous liquid |
| Viscosity (25 °C) | 350–450 mPa·s |
| Acid Value | 18–22 mg KOH/g |
| Reactive Diluent | Styrene (38–42 wt%) |
| Specific Gravity (25 °C) | 1.07–1.09 g/cm³ |
| Storage Stability | ≥6 months at ≤25 °C in sealed containers |
Q1: What is the primary function of Evonik S1408 in polyester resin systems?
A: Evonik S1408 functions as a reactive co-monomer and viscosity modifier, enhancing crosslink density and improving mechanical performance while supporting processability in unsaturated polyester resins.
Q2: Is S1408 compatible with standard styrene-based unsaturated polyester formulations?
A: Yes, S1408 is fully miscible with conventional styrene and commonly used unsaturated polyesters, enabling straightforward integration into existing manufacturing processes without requiring major reformulation.
Q3: How does S1408 influence cure kinetics and final part properties?
A: S1408 contributes to more uniform network formation, often resulting in improved hardness, reduced post-cure shrinkage, and enhanced thermal stability—without significantly accelerating or retarding standard peroxide-initiated curing.
Q4: What handling and storage precautions are recommended for S1408?
A: Store in original sealed containers under cool, dry conditions away from direct sunlight and strong oxidizers. Ensure adequate ventilation during handling, and refer to the Safety Data Sheet for detailed occupational hygiene guidance.
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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
