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Exceptional thermal stability up to 1000 °C in oxidizing atmospheres.
Non-toxic, heavy-metal-free composition compliant with global regulatory standards (RoHS, REACH).
High opacity and excellent lightfastness under prolonged UV exposure.
Chemically inert — resistant to acids, alkalis, and solvents commonly used in industrial coatings.
Consistent particle size distribution ensuring uniform dispersion and color reproducibility.
High-temperature ceramic glazes and kiln-fired decorative tiles.
Thermal barrier coatings for exhaust systems and industrial furnace linings.
Fire-resistant intumescent paints and passive fire protection systems.
Color-stable pigments in glass enamels and vitreous coatings.
Heat-resistant inks for labeling on automotive and aerospace components.
| Chemical Type | Mixed-metal oxide (chromium-iron spinel-based) |
| Product Form | Fine dry powder |
| Appearance | Dark reddish-brown free-flowing powder |
| Primary Applications | Ceramics, high-temperature coatings, fire protection materials |
| Key Features | Thermal stability, UV resistance, chemical inertness |
| Benefits | Long-term color retention, non-fading under extreme heat, low volatility |
| Storage Conditions | Store in cool, dry, well-ventilated area; protect from moisture |
| Regulatory Compliance | REACH registered, RoHS compliant, non-hazardous per GHS |
Q1: What is the primary chemical composition of CATHAYTHERM RA18HR?
A: CATHAYTHERM RA18HR is a high-performance inorganic pigment based on a stabilized mixed-metal oxide system, engineered for exceptional thermal stability and inertness in demanding polymer and coating applications.
Q2: Is RA18HR suitable for use in polyolefins exposed to elevated processing temperatures?
A: Yes — RA18HR is specifically formulated for thermal stability up to 300°C and demonstrates excellent compatibility and dispersion retention in polypropylene, polyethylene, and other thermoplastics processed via extrusion or injection molding.
Q3: How does RA18HR perform under UV exposure and outdoor weathering?
A: As an inorganic pigment with inherent UV resistance, RA18HR delivers outstanding long-term color stability and minimal fading in outdoor applications, including automotive exterior components and architectural coatings.
Q4: Can RA18HR be used in food-contact plastics?
A: RA18HR is designed to meet general requirements for inertness and low extractability in polymer systems; however, final regulatory compliance for food-contact applications depends on the full formulation, processing conditions, and applicable regional regulations — users must conduct appropriate migration testing and consult local authorities.
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E-mail: wangxingqiang@ericwchem.com
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