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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.
Non-toxic, heavy-metal-free formulation compliant with global regulatory standards including EN 71-3 and RoHS.
Superior dispersibility in aqueous and solvent-based systems, enabling uniform color distribution without agglomeration.
Chemically inert in acidic and alkaline environments, ensuring compatibility with diverse binder systems.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
High-performance architectural coatings and industrial maintenance paints.
Plastic coloration for automotive interior components and durable consumer goods.
Colored glass formulations requiring heat-stable red hues.
Specialty inks for packaging and decorative printing on heat-resistant substrates.
| Chemical Type | Complex metal oxide (Calcium Molybdate-based) |
| Product Form | Free-flowing fine powder |
| Appearance | Bright reddish-orange powder |
| Primary Applications | Ceramics, coatings, plastics, glass, inks |
| Key Features | Heat stable, non-toxic, UV resistant, chemically inert |
| Particle Size (D50) | 0.8–1.2 µm |
| pH (10% aqueous slurry) | 6.5–7.5 |
| VOC Content | Non-applicable (inorganic solid) |
Q1: What is the primary chemical composition of Cathay CATHAYPURE Red R5215?
A: Cathay CATHAYPURE Red R5215 is an inorganic iron-based red pigment, primarily composed of modified iron oxide with controlled crystallinity and surface characteristics to enhance color strength and thermal stability.
Q2: Is this pigment suitable for high-temperature polymer processing applications?
A: Yes — R5215 exhibits excellent thermal stability and is widely used in engineering thermoplastics such as polyamide, polypropylene, and polyester processed at temperatures up to 280°C without significant color shift or degradation.
Q3: How does R5215 compare to organic red pigments in terms of lightfastness and weather resistance?
A: As an inorganic pigment, R5215 delivers superior lightfastness and long-term UV resistance compared to most organic reds, making it well-suited for outdoor applications where color retention under prolonged exposure is critical.
Q4: Can R5215 be used in food-contact plastic compounds?
A: R5215 is formulated to meet general requirements for indirect food-contact applications in plastics, subject to final regulatory review by the end-user’s compliance team and adherence to applicable regional food safety frameworks.
Q5: What dispersion methods are recommended for optimal performance in masterbatch production?
A: For consistent dispersion, high-shear compounding is recommended — particularly twin-screw extrusion with optimized screw design and residence time. Pre-wetting with compatible carrier resins or low-viscosity process oils may further improve distribution in demanding formulations.
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