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High thermal stability suitable for processing temperatures up to 800°C.
Excellent lightfastness and weather resistance, maintaining color integrity under prolonged UV exposure.
Non-toxic and heavy metal-free formulation compliant with global regulatory standards including EN 71-3 and RoHS.
Consistent particle size distribution ensuring uniform dispersion and optimal tinting strength.
Low oil absorption for improved formulation efficiency in high-solids coatings and plastics.
Architectural and industrial coatings requiring durable earth-tone pigmentation.
Plastic coloration for outdoor applications including automotive interior trims and construction profiles.
Ceramic glazes and underglaze decorations where high-temperature stability is critical.
Concrete and mortar colorants for precast and ready-mix applications.
Printing inks for packaging materials demanding non-fading, eco-compliant pigments.
| Chemical Type | Iron oxide-based inorganic pigment (Fe₂O₃–MnO–Al₂O₃ complex) |
| Product Form | Fine dry powder |
| Appearance | Dark reddish-brown granular powder |
| Primary Applications | Coatings, plastics, ceramics, concrete, inks |
| Key Features | Thermal stability, lightfastness, weather resistance, low oil absorption |
| Benefits | Regulatory compliance, consistent batch-to-batch performance, easy dispersion |
| pH (5% aqueous slurry) | 6.5 – 7.5 |
| Volatile Matter (105°C, 2 hrs) | ≤ 1.0% |
Q1: What is the primary chemical composition of Cathay Hoover 509E-BU?
A: Cathay Hoover 509E-BU is a synthetic inorganic pigment based on iron oxide–manganese oxide mixed oxides, engineered to deliver consistent burnt umber hue, high thermal stability, and excellent lightfastness.
Q2: Is this pigment suitable for use in high-temperature processing applications?
A: Yes — as a fully calcined inorganic oxide pigment, 509E-BU exhibits excellent thermal stability and is routinely used in applications involving processing temperatures up to 800 °C, including ceramic glazes, refractory coatings, and high-bake industrial finishes.
Q3: How does 509E-BU compare to natural burnt umber in terms of color consistency and performance?
A: Unlike natural earth pigments, which vary significantly in hue and impurity content, 509E-BU offers tightly controlled particle size distribution and batch-to-batch color uniformity, resulting in superior reproducibility in demanding industrial formulations.
Q4: Can this pigment be dispersed effectively in water-based systems?
A: Yes — 509E-BU is surface-treated to enhance wettability and dispersibility in both aqueous and solvent-based media. Optimal dispersion typically requires standard high-shear mixing or bead milling, with formulation-specific dispersants recommended for maximum stability.
Q5: What safety and handling precautions should be observed during industrial use?
A: As with all fine inorganic powders, appropriate engineering controls (e.g., local exhaust ventilation) and personal protective equipment (e.g., NIOSH-approved respirators for dust) are recommended during handling to minimize inhalation exposure. The material is not classified as hazardous under GHS for acute toxicity or environmental hazards when used as intended.
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