English
Español
tiếng việt
русский
Naturally derived iron oxide-based pigment with consistent earthy brown hue and excellent lightfastness.
High thermal stability suitable for processing temperatures up to 300°C without color degradation.
Low water solubility and outstanding alkali resistance, ensuring compatibility in cementitious and plaster systems.
Non-toxic, heavy metal-free formulation compliant with EU REACH and ASTM D5067 standards.
Optimized particle size distribution for uniform dispersion and minimal settling in liquid media.
Architectural coatings including exterior masonry paints and textured finishes.
Cement, concrete, and precast concrete products for integral coloring.
Tile grouts and polymer-modified mortars requiring durable, UV-stable pigmentation.
Plaster and stucco systems where natural tone consistency and weather resistance are critical.
Industrial flooring compounds and epoxy-based decorative surfacing materials.
| Chemical Type | Natural iron oxide (Fe₂O₃·H₂O) with clay matrix |
| Product Form | Fine dry powder |
| Appearance | Free-flowing, reddish-brown granular powder |
| Primary Applications | Cementitious systems, architectural coatings, mortars, plasters |
| Key Features | Lightfastness rating: ASTM D4303 Class I; pH stability: 5–12 |
| Benefits | Color consistency batch-to-batch; low oil absorption (~18 g/100g) |
| Storage Conditions | Store in cool, dry, well-ventilated area away from moisture |
| Regulatory Compliance | REACH registered; non-hazardous per GHS classification |
Q1: What is the primary chemical composition of Cathay Hoover 418RU?
A: Cathay Hoover 418RU is a naturally derived, iron oxide–based inorganic pigment, primarily composed of hydrated iron oxides and manganese oxides, with trace amounts of silica and alumina typical of mineral-derived raw umber earths.
Q2: Is 418RU suitable for use in exterior architectural coatings?
A: Yes — as a naturally weather-resistant iron oxide pigment, 418RU offers excellent lightfastness, UV stability, and alkali resistance, making it well-suited for long-term performance in exterior masonry, stucco, and cementitious coatings.
Q3: How does 418RU differ from synthetic iron oxide umbers?
A: Unlike synthetics, 418RU retains the subtle variation in hue and texture characteristic of natural earth pigments, offering warmer undertones and lower tinting strength — ideal for applications where authenticity and soft chroma are preferred over high-intensity coloration.
Q4: Can 418RU be used in water-based systems without dispersion additives?
A: While 418RU is inherently compatible with aqueous media, optimal dispersion and stability in water-based paints or plasters typically require standard wetting agents and dispersants — especially when targeting fine particle distribution and consistent color development.
Q5: What is the recommended dosage range for achieving standard opacity in architectural coatings?
A: Dosage depends on formulation requirements and desired depth of tone, but 418RU is typically used at low concentrations — generally ranging from 0.1% to 2% by weight — to deliver full coverage and natural earthy coloration without compromising film integrity.
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
