English
Español
tiếng việt
русский
High thermal stability up to 600 °C, ensuring color integrity in high-temperature processing.
Excellent lightfastness and weather resistance, meeting ISO 105-B02 Class 7–8 performance standards.
Low oil absorption (18–22 g/100 g), enabling efficient dispersion and improved formulation rheology.
Non-toxic and heavy-metal-free, compliant with EN 71-3 and RoHS Directive requirements.
Consistent batch-to-batch color strength and hue, supported by rigorous in-house spectral quality control.
Architectural and industrial coatings requiring durable earth-tone pigmentation.
Concrete and cement-based products, including precast elements and terrazzo flooring.
Plastic masterbatches for outdoor applications such as garden furniture and construction profiles.
Ceramic glazes and underglaze decorations fired at stoneware and porcelain temperatures.
High-performance powder coatings for metal substrates exposed to UV and moisture.
| Chemical Type | Iron oxide-based inorganic pigment (Fe₂O₃–MnO–Al₂O₃ complex) |
| Product Form | Fine dry powder |
| Appearance | Uniform reddish-brown granular powder |
| Primary Applications | Coatings, construction materials, plastics, ceramics |
| Key Features | Thermal stability, lightfastness, chemical inertness, low solubility |
| Benefits | Color consistency, ease of dispersion, regulatory compliance |
| pH (10% aqueous suspension) | 6.5–7.5 |
| Volatile Matter (105 °C, 2 h) | ≤0.5 wt% |
Q1: What is the primary chemical composition of Cathay Burnt Umber UB85?
A: Cathay Burnt Umber UB85 is a calcined iron oxide-based inorganic pigment, primarily composed of iron oxides (Fe₂O₃ and Fe₃O₄) with naturally occurring manganese and aluminum oxides contributing to its characteristic warm, reddish-brown burnt umber hue.
Q2: Is UB85 suitable for use in exterior architectural coatings?
A: Yes — UB85 exhibits excellent lightfastness, weather resistance, and alkali stability, making it well-suited for exterior architectural paints, stucco, and cementitious systems where long-term color retention under UV exposure and environmental stress is required.
Q3: How does UB85 compare to raw umber pigments in terms of tinting strength and heat stability?
A: As a burnt (calcined) variant, UB85 offers higher tinting strength, improved chroma, and significantly enhanced thermal stability compared to raw umber. It retains its color integrity during high-temperature processing steps common in thermoplastics, powder coatings, and ceramic glazes.
Q4: Can UB85 be used in food-contact plastics or toys?
A: While UB85 is an inherently stable inorganic pigment with low solubility and negligible leachability, its suitability for regulated applications such as food-contact materials or children’s products depends on full formulation compliance and end-product testing against applicable regional safety requirements — it is not pre-certified for such uses.
Q5: What is the typical dosage range for UB85 in industrial coatings and construction materials?
A: Dosage varies by application and desired opacity, but UB85 is typically used at low concentrations — generally ranging from 0.1% to 2% by weight in architectural coatings, concrete admixtures, and dry-mix mortars — due to its strong coloring power and efficient dispersion characteristics.
Contact With Us:
E-mail: wangxingqiang@ericwchem.com
Have a Questions? Call Us:
Add:
Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
