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High thermal stability suitable for processing temperatures up to 1000 °C.
Excellent chemical resistance against acids, alkalis, and solvents.
Non-toxic formulation compliant with global regulatory standards including REACH and RoHS.
Outstanding lightfastness and weather resistance for long-term outdoor performance.
Consistent particle size distribution ensuring uniform dispersion and color strength.
Ceramic glazes and frits for tableware and architectural tiles.
High-performance refractory coatings in industrial furnace linings.
Coloration of glass enamels and vitreous coatings.
Stabilized pigments for flame-retardant plastic composites.
Functional coloring agents in technical ceramics and electronic substrates.
| Chemical Type | Mixed metal oxide (Zinc Iron Chromite-based) |
| Product Form | Free-flowing fine powder |
| Appearance | Opaque yellow-brown granular powder |
| Primary Applications | Ceramics, refractories, glass enamels, high-temperature coatings |
| Key Features | Thermal stability, acid/alkali resistance, non-volatile, heavy-metal reduced |
| Benefits | Color consistency at elevated temperatures, low volatility during firing, minimal sintering impact |
| Storage Conditions | Store in dry, cool, well-ventilated area away from moisture and direct sunlight |
| Regulatory Compliance | REACH registered, RoHS compliant, EU No. 1907/2006 Annex XIV not applicable |
Q1: What is the primary chemical composition of HEUCODUR Yellow 9239?
A: HEUCODUR Yellow 9239 is a high-performance inorganic yellow pigment based on a complex metal oxide system, engineered for thermal and chemical stability. Its exact composition is proprietary to Heubach, but it is formulated without regulated heavy metals such as lead, cadmium, or mercury.
Q2: Is this pigment suitable for use in food-contact plastics?
A: Yes — HEUCODUR Yellow 9239 is specifically developed for applications requiring compliance with global food-contact regulations. It is widely used in polyolefins and engineering thermoplastics intended for food packaging and kitchenware, provided final formulations undergo appropriate regulatory evaluation per target market requirements.
Q3: How does HEUCODUR Yellow 9239 perform under high-temperature processing conditions?
A: This pigment exhibits excellent thermal stability and retains its color strength and hue integrity during standard melt-processing of polymers such as PP, PE, and PS at temperatures up to 300 °C. It shows minimal degradation or color shift even under extended residence times typical in extrusion and injection molding.
Q4: What are the recommended dispersion methods for optimal color development?
A: For best results, pre-dispersion using high-shear mixing or twin-screw compounding is recommended. The pigment responds well to standard polymer processing equipment and achieves uniform distribution without requiring specialized dispersants, though compatibility with carrier resins should be verified for each application.
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