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High thermal stability up to 800 °C, enabling compatibility with high-temperature ceramic and glass firing processes.
Excellent chemical resistance to acids, alkalis, and solvents, ensuring long-term color integrity in aggressive environments.
Non-toxic and heavy-metal-free formulation compliant with EU RoHS and REACH regulations.
Consistent particle size distribution for uniform dispersion and reproducible shade development.
Outstanding lightfastness and weather resistance, maintaining chroma and hue under prolonged UV exposure.
Ceramic glazes and underglaze decorations for tableware and architectural tiles.
Colorants for vitreous enamels on metal substrates (e.g., appliances, cookware).
Pigmentation of specialty glass, including borosilicate and soda-lime compositions.
High-performance inorganic pigments for refractory coatings and kiln furniture.
Stable blue colorant in flame-resistant polymer composites for construction applications.
| Chemical Type | Cobalt-aluminum spinel (CoAl₂O₄) |
| Product Form | Fine crystalline powder |
| Appearance | Intense blue granular powder |
| Primary Applications | Ceramics, glass, enamels, refractories |
| Key Features | Thermal stability, acid/alkali resistance, non-volatile |
| Benefits | Color consistency, regulatory compliance, low migration risk |
| Storage Conditions | Store in dry, cool, well-ventilated area; protect from moisture |
| Regulatory Status | Compliant with EU REACH Annex XIV (non-listed), RoHS 2.0 |
Q1: What is the primary chemical composition of HEUCODUR Blue 550?
A: HEUCODUR Blue 550 is a cobalt-free, inorganic blue pigment based on a stabilized spinel-type crystal structure, engineered for high thermal and chemical stability in demanding polymer processing environments.
Q2: Is HEUCODUR Blue 550 suitable for food-contact plastics?
A: Yes — it is formulated to comply with global food-contact regulations for plastics, including FDA 21 CFR §178.3297 and EU Regulation (EC) No 1935/2004, when used within approved application conditions and dosage limits.
Q3: How does HEUCODUR Blue 550 perform under high-temperature processing?
A: It exhibits excellent thermal stability, retaining color integrity and dispersion quality during standard polymer processing methods such as injection molding, extrusion, and blow molding at temperatures up to 300 °C.
Q4: What types of polymers is HEUCODUR Blue 550 commonly used in?
A: It is widely compatible with polyolefins (PP, PE), engineering thermoplastics (PA, PBT, PC), and thermoplastic elastomers, offering good dispersibility and minimal impact on mechanical properties.
Q5: What is the typical dosage range for optimal coloration?
A: Dosage depends on formulation requirements and desired shade intensity, but it is typically used at low concentrations — generally ranging from 0.1% to 2% by weight — due to its high tinting strength and opacity.
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