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High thermal stability up to 800°C, ensuring color integrity during high-temperature processing.
Excellent lightfastness and weather resistance, maintaining hue and opacity under prolonged UV exposure.
Non-toxic, heavy-metal-free formulation compliant with global regulatory standards including EN 71-3 and RoHS.
Consistent particle size distribution for optimal dispersion and rheological performance in liquid systems.
Strong tinting strength and high hiding power, enabling efficient pigment loading and cost-effective formulation.
Architectural coatings and exterior wall paints requiring durable earth-tone coloration.
Ceramic glazes and underglaze decorations for stoneware and porcelain firing processes.
Plastic coloration for outdoor applications including garden furniture, automotive trim, and construction profiles.
Concrete admixtures and precast concrete products for consistent, fade-resistant structural coloring.
Industrial powder coatings where heat resistance and chemical inertness are critical.
| Chemical Type | Iron oxide-based inorganic pigment (α-Fe₂O₃ dominant phase) |
| Product Form | Dry powder |
| Appearance | Free-flowing reddish-brown powder |
| Primary Applications | Coatings, plastics, ceramics, concrete, and powder coatings |
| Key Features | Heat stable, lightfast, non-volatile, chemically inert |
| Benefits | Low migration, excellent dispersibility, low oil absorption (~18 g/100g) |
| pH Value (5% aqueous slurry) | 6.5–7.5 |
| Volatile Matter (105°C, 2 hrs) | ≤0.5% |
Q1: What is the primary chemical composition of Cathay Hoover 310BS?
A: Cathay Hoover 310BS is an iron oxide-based inorganic pigment, primarily composed of hematite (α-Fe₂O₃), thermally stabilized to deliver its characteristic burnt sienna hue and enhanced thermal and light stability.
Q2: Is 310BS suitable for high-temperature applications such as ceramic glazes or automotive coatings?
A: Yes — as a calcined iron oxide pigment, 310BS exhibits excellent thermal stability and retains color integrity at elevated processing temperatures, making it well-suited for ceramic colorants, powder coatings, and other high-heat industrial applications.
Q3: How does 310BS compare to organic burnt sienna alternatives in terms of weather resistance?
A: Unlike organic counterparts, 310BS offers superior UV resistance, minimal fading under prolonged outdoor exposure, and excellent alkali stability — key advantages for exterior architectural coatings, concrete coloration, and facade systems.
Q4: Can 310BS be dispersed in both water-based and solvent-based systems?
A: Yes — 310BS is inherently compatible with a broad range of media. With appropriate dispersion aids and milling, it achieves stable, uniform distribution in aqueous paints, plasters, polymer masterbatches, and solvent-borne industrial coatings.
Q5: What is the typical dosage range for achieving full opacity in architectural coatings?
A: Dosage depends on formulation requirements and desired chroma, but 310BS is typically used at low concentrations — generally ranging from 0.1% to 2% by weight — to achieve strong tinting strength and consistent coverage without compromising film integrity.
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E-mail: wangxingqiang@ericwchem.com
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