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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 aqueous and solvent-based systems.
Non-toxic composition compliant with major global regulatory frameworks for industrial pigments (e.g., EN 71-3, RoHS).
Fine particle size distribution enabling smooth dispersion and high color development in demanding matrices.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
High-performance architectural and industrial coatings requiring long-term color retention.
Coloration of vitreous enamels for appliances, cookware, and signage substrates.
Plastic compounds for outdoor applications where heat and UV resistance are critical.
Specialty inks for heat-transfer printing on textiles and technical fabrics.
| Chemical Type | Mixed-metal oxide (Fe–Cr–Al spinel-based) |
| Product Form | Free-flowing fine powder |
| Appearance | Brilliant ruby-red powder |
| Primary Applications | Ceramics, enamels, high-temp coatings, engineering plastics |
| Key Features | Heat stable, lightfast, chemically inert, non-volatile |
| Benefits | Consistent batch-to-batch color, easy dispersion, low migration risk |
| Density (g/cm³) | 4.2 – 4.5 |
| pH (5% aqueous slurry) | 6.5 – 7.5 |
Q1: What is the primary chemical composition of Cathay CATHAYCOAT Red RS11A?
A: Cathay CATHAYCOAT Red RS11A is an inorganic iron-based red pigment, formulated as a stabilized iron oxide complex with enhanced thermal and chemical resistance. Its composition is optimized for opacity, lightfastness, and compatibility in demanding industrial coating systems.
Q2: Is this pigment suitable for high-temperature curing applications, such as coil coatings or powder coatings?
A: Yes — RS11A exhibits excellent thermal stability and retains its color integrity during standard industrial curing cycles up to 250°C, making it well-suited for coil coatings, powder coatings, and other heat-cured systems where organic pigments would degrade.
Q3: How does RS11A perform in acidic or alkaline environments commonly encountered in industrial primers and anticorrosive coatings?
A: As an inorganic oxide pigment, RS11A demonstrates strong resistance to both mild acidic and alkaline conditions, supporting long-term stability in zinc-rich primers, epoxy intermediates, and waterborne anticorrosive formulations without significant leaching or hue shift.
Q4: Can RS11A be used in waterborne coating systems without dispersion additives?
A: While RS11A is inherently compatible with waterborne architectures, optimal dispersion and long-term colloidal stability typically require appropriate surfactants or polymeric dispersants — especially in low-VOC or high-solids formulations where particle aggregation must be minimized.
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