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High reactivity with standard peroxide initiators for rapid gelation and efficient production cycles.
Excellent mechanical strength and impact resistance in cured laminates and molded parts.
Good weathering stability and UV resistance, suitable for semi-outdoor applications.
Low viscosity at room temperature enabling easy handling, impregnation, and compatibility with glass fiber reinforcement.
Consistent batch-to-batch performance ensured by Chang Chun’s stringent quality control protocols.
Fiberglass-reinforced plastic (FRP) tanks and chemical storage vessels.
Marine components including boat hulls, decks, and structural panels.
Industrial grating and corrosion-resistant ductwork systems.
Automotive under-hood components requiring thermal and chemical resilience.
Architectural cladding and decorative composite panels.
| Chemical Type | Unsaturated orthophthalic polyester resin |
| Product Form | Liquid |
| Appearance | Clear to pale yellow transparent liquid |
| Viscosity (25°C) | 350–450 mPa·s |
| Acid Value | 18–22 mg KOH/g |
| Gel Time (with 1.0% MEKP, 25°C) | 12–18 minutes |
| Solids Content | 99.5–100 wt% |
| Primary Applications | Hand lay-up, spray-up, and filament winding processes |
Q1: What is the primary application field for ETERKYD 50633-X-74?
A: ETERKYD 50633-X-74 is specifically formulated as a reactive diluent and modifier for unsaturated polyester resins, commonly used in high-performance gel coats, laminating resins, and casting systems where enhanced flow, reduced exotherm, and improved surface finish are required.
Q2: How does ETERKYD 50633-X-74 differ from standard styrene-based diluents?
A: Unlike conventional styrene, ETERKYD 50633-X-74 is a low-volatility, reactive polyester-based diluent offering significantly reduced VOC emissions, lower odor, and improved compatibility with polar resin systems—supporting safer handling and more stable formulation viscosity over time.
Q3: Can this resin be used in food-contact or potable water applications?
A: ETERKYD 50633-X-74 is not pre-approved for direct food-contact or potable water applications. Its use in such contexts requires full regulatory evaluation—including migration testing and compliance verification—by the end-product manufacturer under applicable regional frameworks.
Q4: What storage conditions are recommended to maintain product stability?
A: Store in tightly sealed original containers at temperatures between 15°C and 25°C, away from direct sunlight, moisture, and strong oxidizing agents. Prolonged exposure to elevated temperatures or humidity may affect viscosity and reactivity profile.
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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
