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High thermal stability up to 800 °C, suitable for high-temperature ceramic and enamel applications.
Excellent lightfastness and weather resistance, maintaining color integrity under prolonged UV exposure.
Low solubility in water and common organic solvents, ensuring formulation stability in coatings and plastics.
Non-toxic composition compliant with major global regulatory frameworks including RoHS and REACH.
Fine particle size distribution (D50 ≈ 1.2–1.8 μm) enabling smooth dispersion and high chroma development.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
High-performance industrial coatings for automotive and appliance exteriors.
Colorants in vitreous enamels for metal substrates including cookware and signage.
Pigmentation of engineering plastics requiring heat resistance and regulatory compliance.
Specialty inks for glass and metal packaging where food-contact safety is required.
| Chemical Type | Mixed-metal oxide (lead-free vanadate-based) |
| Product Form | Free-flowing dry powder |
| Appearance | Bright yellow to golden-yellow powder |
| Primary Applications | Ceramics, enamels, high-temp coatings, engineering plastics |
| Key Features | Heat stable, UV resistant, low volatility, non-hygroscopic |
| Benefits | Consistent batch-to-batch color, easy dispersion, minimal flocculation |
| Storage Conditions | Store in cool, dry place; keep container tightly closed |
| Regulatory Compliance | REACH SVHC-free, RoHS-compliant, FDA indirect food contact compliant (21 CFR 178.3297) |
Q1: What is the primary chemical composition of Cathay CATHAYCOAT Yellow YS21?
A: Cathay CATHAYCOAT Yellow YS21 is a high-performance inorganic yellow pigment based on a modified complex metal oxide system, engineered for enhanced thermal stability and lightfastness. Its exact composition is proprietary, but it contains no heavy metals such as lead, cadmium, or hexavalent chromium.
Q2: Is YS21 suitable for use in heat-sensitive polymer systems like polyolefins or PVC?
A: Yes — YS21 exhibits excellent thermal stability and is routinely processed in extrusion and injection molding applications up to 280°C. It demonstrates minimal color shift under typical polyolefin processing conditions and maintains dispersion integrity in rigid and flexible PVC formulations.
Q3: How does YS21 perform in outdoor weathering applications, such as architectural coatings or exterior plastic profiles?
A: YS21 delivers outstanding resistance to UV radiation and atmospheric exposure due to its inorganic crystalline structure. When properly formulated in acrylic or silicone-modified alkyd binders, it retains chroma and hue stability over extended outdoor service life, making it well-suited for demanding exterior applications.
Q4: Can YS21 be used in food-contact plastics or packaging materials?
A: While YS21 is non-toxic and free from regulated heavy metals, it is not pre-approved for direct food-contact applications under global regulatory frameworks. Formulators must conduct full compliance testing per applicable regional requirements (e.g., FDA 21 CFR, EU Plastics Regulation) and obtain final regulatory clearance for their specific end-use configuration.
Q5: What is the recommended dosage range for optimal color development and cost efficiency?
A: Dosage depends on the base resin, desired opacity, and application method, but YS21 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight — to achieve strong yellow chroma while maintaining processability and physical properties.
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