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High-solids, solvent-based unsaturated polyester resin offering excellent gloss and surface hardness.
Optimized for fast cure kinetics with peroxide initiators, enabling efficient coil coating and continuous processing.
Superior weather resistance and UV stability, supporting long-term outdoor performance in demanding environments.
Excellent compatibility with common pigments, fillers, and additives used in industrial coatings formulations.
Low volatile organic compound (VOC) content relative to conventional polyester resins, supporting regulatory compliance.
Coil coatings for architectural and industrial metal roofing and wall panels.
Prefinished metal (PFM) coatings requiring high durability and color retention.
General-purpose industrial maintenance coatings for metal substrates.
Topcoats in multi-layer systems for transportation and appliance applications.
UV-curable hybrid coating systems where thermal stability and resin backbone integrity are critical.
| Chemical Type | Unsaturated polyester resin |
| Product Form | Liquid, solvent-based |
| Appearance | Clear to pale yellow viscous liquid |
| Primary Applications | Coil coatings, industrial maintenance coatings, prefabricated metal finishes |
| Key Features | High solids, fast cure, UV stable, low VOC |
| Recommended Initiator | MEKP (methyl ethyl ketone peroxide) |
| Storage Stability | 12 months in original unopened container at 15–25°C |
| Regulatory Compliance | REACH compliant;不含邻苯二甲酸盐 (phthalate-free) |
Q1: What is the primary function of ROSKYDAL 500 A in polyester resin systems?
A: ROSKYDAL 500 A is a reactive diluent and viscosity modifier designed to reduce the viscosity of unsaturated polyester resins without significantly compromising reactivity or final mechanical properties. It enables improved processability during impregnation, casting, or spray applications while maintaining good crosslink density.
Q2: Is ROSKYDAL 500 A compatible with standard peroxide initiators used in polyester curing?
A: Yes, ROSKYDAL 500 A is fully compatible with common organic peroxides such as methyl ethyl ketone peroxide (MEKP) and benzoyl peroxide (BPO), and does not interfere with typical free-radical curing mechanisms. No special initiator adjustments are generally required.
Q3: How does ROSKYDAL 500 A compare to styrene in terms of volatility and handling safety?
A: ROSKYDAL 500 A exhibits lower volatility and higher boiling point than styrene, resulting in reduced VOC emissions and improved workplace handling characteristics. It also offers lower odor and reduced skin sensitization potential compared to traditional aromatic diluents.
Q4: Can ROSKYDAL 500 A be used in formulations requiring low shrinkage or enhanced surface finish?
A: Yes — due to its molecular structure and controlled reactivity, ROSKYDAL 500 A contributes to reduced polymerization shrinkage and supports improved surface aesthetics, including gloss retention and reduced micro-cracking, especially in gel coats and top layers.
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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
