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High thermal stability up to 800 °C, ensuring color integrity during high-temperature processing.
Excellent lightfastness and weather resistance, minimizing fading under prolonged UV exposure.
Low oil absorption (< 25 g/100 g), enabling efficient dispersion and improved formulation viscosity control.
Non-toxic and heavy-metal-free, compliant with EN 71-3 and RoHS directives for safe handling and use.
Consistent particle size distribution for uniform tinting strength and batch-to-batch reproducibility.
Ceramic glazes and underglaze decorations requiring heat-stable brown hues.
Architectural coatings and exterior wall paints demanding long-term color retention.
Plastic coloration for automotive interior components and construction profiles.
Concrete and mortar colorants for precast and ready-mix applications.
Industrial powder coatings where thermal curing and UV durability are critical.
| Chemical Type | Natural iron oxide-based (Fe₂O₃–MnO complex) |
| Product Form | Fine dry powder |
| Appearance | Uniform reddish-brown granular powder |
| Primary Applications | Ceramics, architectural coatings, plastics, concrete, powder coatings |
| Key Features | Heat stable, lightfast, low oil absorption, non-toxic |
| Benefits | Batch consistency, easy dispersion, regulatory compliance (RoHS, EN 71-3) |
| pH (5% aqueous slurry) | 6.5 – 7.5 |
| Volatile Matter (105 °C, 2 h) | ≤ 1.0 wt% |
Q1: What is the primary chemical composition of Cathay Hoover 514BU?
A: Cathay Hoover 514BU is an iron oxide-based inorganic pigment, primarily composed of hydrated and calcined iron oxides (Fe₂O₃ with minor FeO and associated clay minerals), delivering its characteristic burnt umber hue through controlled thermal processing.
Q2: Is 514BU suitable for use in exterior architectural coatings?
A: Yes — as a high-performance inorganic oxide pigment, 514BU exhibits excellent lightfastness, UV stability, and weather resistance, making it well-suited for long-term outdoor applications including masonry paints, stucco, and cementitious renders.
Q3: How does 514BU compare to organic brown pigments in terms of heat stability?
A: 514BU offers significantly higher thermal stability than most organic brown pigments, retaining its color integrity during high-temperature processing steps such as extrusion, calendering, or powder coating curing — typically up to 800°C in inert atmospheres.
Q4: Can 514BU be used in food-contact plastics or packaging inks?
A: While 514BU is manufactured under strict quality control and meets general heavy metal limits for industrial pigments, it is not pre-certified for direct food-contact applications. Regulatory compliance must be verified case-by-case with relevant authorities and end-use formulation testing.
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E-mail: wangxingqiang@ericwchem.com
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