English
Español
tiếng việt
русский
High chroma, reddish-brown hue with excellent color strength and tinting power.
Outstanding lightfastness and weather resistance, suitable for exterior applications.
Low oil absorption ensures efficient dispersion and improved formulation stability.
Non-toxic, heavy-metal-free composition compliant with global regulatory standards (e.g., EN 71-3, RoHS).
Consistent particle size distribution for uniform color development and reduced grinding time.
Architectural coatings and decorative wall paints.
Cement-based products including colored concrete, pavers, and tiles.
Plastic masterbatches for outdoor profiles, garden furniture, and construction components.
Industrial floor coatings and epoxy terrazzo systems.
Ceramic glazes and underglaze colorants requiring thermal stability up to 1000°C.
| Chemical Type | Synthetic α-Fe₂O₃ (Hematite) |
| Product Form | Fine dry powder |
| Appearance | Free-flowing reddish-brown powder |
| Primary Applications | Coatings, construction materials, plastics, ceramics |
| Key Features | Lightfastness ≥8 (ISO 105-B02), Weather resistance Class 4–5 (DIN 53209) |
| Benefits | Easy dispersion, low dust generation, high opacity |
| pH (10% aqueous suspension) | 6.5–8.0 |
| Volatile Matter (105°C, 2h) | ≤0.5 wt% |
Q1: What is the primary chemical composition and crystal structure of Nubiola R-5520?
A: Nubiola R-5520 is a synthetic iron oxide pigment based predominantly on hematite (α-Fe₂O₃), offering excellent chromatic stability and UV resistance due to its well-defined rhombohedral crystalline structure.
Q2: Is R-5520 suitable for use in exterior architectural coatings?
A: Yes — R-5520 is specifically engineered for high-performance exterior applications, delivering outstanding weatherfastness, low chalkiness, and long-term color retention under prolonged UV exposure and moisture cycling.
Q3: How does R-5520 compare to natural iron oxides in terms of particle size distribution and dispersion behavior?
A: As a synthetic pigment, R-5520 features a narrower, more controlled particle size distribution than natural earth pigments, resulting in improved tinting strength, better dispersion stability in aqueous and solvent-based systems, and reduced rheological variability during formulation.
Q4: Can R-5520 be used in cementitious systems such as mortars and concrete stains?
A: Yes — R-5520 exhibits excellent alkali resistance and compatibility with Portland cement matrices, making it widely used in integral coloring of concrete, grouts, and architectural precast elements without compromising setting behavior or final strength development.
Q5: What are the recommended handling precautions for R-5520 during industrial processing?
A: Standard industrial hygiene practices apply: avoid inhalation of dust through local exhaust ventilation and appropriate respiratory protection; minimize skin contact using gloves and protective clothing; and follow good housekeeping to prevent accumulation of airborne particles.
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
