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High-solids, low-VOC unsaturated polyester resin designed for energy-efficient curing.
Excellent weather resistance and UV stability for long-term outdoor performance.
Good mechanical strength and chemical resistance in cured thermoset applications.
Optimized reactivity for consistent gel time control with standard peroxide initiators.
Low styrene emission profile supporting industrial hygiene and regulatory compliance.
Fiberglass-reinforced plastic (FRP) panels for architectural cladding and roofing.
Marine deck and hull components requiring hydrolytic stability and impact resilience.
Transportation interior parts including bus and rail composites.
Industrial tanks and corrosion-resistant linings for chemical containment.
Precision-cast decorative and functional composite moldings.
| Chemical Type | Unsaturated polyester resin |
| Product Form | Liquid |
| Appearance | Clear to pale yellow viscous liquid |
| Solids Content | ~98% w/w |
| Viscosity (25°C) | 400–600 mPa·s |
| Acid Value | 12–16 mg KOH/g |
| Primary Applications | FRP, marine composites, transportation, corrosion-resistant linings |
| Key Features | High solids, low VOC, UV-stable, styrene-reduced formulation |
Q1: What is the primary function of ROSKYDAL K 68 in coating formulations?
A: ROSKYDAL K 68 is a low-viscosity, high-solids unsaturated polyester resin designed primarily as a reactive diluent and viscosity modifier in UV-curable and thermally cured coil coating, can coating, and industrial maintenance coating systems. It contributes to improved film formation, crosslink density, and substrate adhesion without excessive volatile content.
Q2: Is ROSKYDAL K 68 compatible with common photoinitiators used in UV-curable systems?
A: Yes, ROSKYDAL K 68 demonstrates good compatibility with standard free-radical photoinitiators such as benzophenone derivatives and alpha-hydroxy ketones. Its reactivity profile supports efficient radical polymerization under typical UV exposure conditions, though optimal initiator selection should be confirmed through formulation testing.
Q3: How does ROSKYDAL K 68 compare to conventional styrene-based reactive diluents in terms of VOC and odor?
A: ROSKYDAL K 68 is a styrene-free, low-odor polyester resin formulated to support reduced VOC emissions compared to traditional styrenated systems. It enables formulators to meet increasingly stringent environmental and occupational health requirements while maintaining performance in demanding industrial applications.
Q4: Can ROSKYDAL K 68 be used in food-contact coatings?
A: ROSKYDAL K 68 is not pre-approved for direct food-contact applications. Its suitability for such use depends on full regulatory assessment within the final cured coating system—including compliance with applicable regional frameworks—and must be validated by the formulator or end-user through appropriate migration testing and regulatory consultation.
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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
