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High chromatic strength with excellent color consistency across batches.
Outstanding thermal stability suitable for high-temperature processing up to 280 °C.
Excellent dispersibility in polar and non-polar polymer matrices without requiring additional surfactants.
Low migration tendency, ensuring color permanence in demanding end-use environments.
Compliant with major global regulatory frameworks including EU REACH and US FDA 21 CFR §178.3297 for indirect food contact applications.
Polyolefin packaging films (e.g., PP and HDPE shrink sleeves).
Automotive interior components requiring long-term UV and heat resistance.
Household appliances housings and decorative trim parts.
Medical device housings where biocompatibility and sterilization stability are critical.
Electrical insulation components for consumer electronics enclosures.
| Chemical Type | Organic pigment (high-performance azo condensation derivative) |
| Product Form | Free-flowing granular concentrate |
| Appearance | Uniform dark red-brown granules |
| Primary Applications | Polyolefins, engineering thermoplastics, and thermoset composites |
| Key Features | Heat stability, low extractables, high opacity, non-bleeding |
| Recommended Carrier Resin | PP or HDPE (for masterbatch formulation) |
| Volatile Matter (105 °C, 2 h) | ≤ 0.3 wt% |
| Heavy Metals (Pb, Cd, Hg, Cr⁶⁺) | Below detection limit per EN 71-3 and CPSIA |
Q1: What is the primary application field for Clariant Anodal Color S-2 Pigment?
A: Clariant Anodal Color S-2 Pigment is specifically engineered for use in anodized aluminum coloring applications, where it delivers stable, lightfast, and uniform black-to-dark gray shades through electrolytic deposition in sulfuric acid-based anodizing baths.
Q2: Is this pigment compatible with standard sulfuric acid anodizing processes?
A: Yes — Anodal Color S-2 is formulated for compatibility with conventional AC and DC anodizing systems operating in sulfuric acid electrolytes. It exhibits good bath stability and consistent deposition behavior under typical process conditions, including common temperature and voltage ranges.
Q3: How is dosage typically controlled in the anodizing bath?
A: Dosage depends on formulation requirements and desired shade intensity, but it is generally introduced as a concentrated aqueous dispersion. Typical working concentrations range from 0.1% to 2% by weight relative to the electrolyte volume, adjusted gradually while monitoring color development and bath performance.
Q4: Does this pigment require special handling or pre-treatment before addition to the bath?
A: Prior to dosing, the pigment dispersion should be thoroughly homogenized and added slowly under agitation to ensure uniform distribution. Avoid direct addition of undiluted concentrate; dilution with deionized water prior to bath introduction is recommended to prevent localized concentration spikes.
Q5: Can Anodal Color S-2 be used alongside other anodizing dyes or additives?
A: Compatibility with other organic dyes or metal salt additives must be verified case-by-case. We recommend conducting small-scale co-dosing trials and monitoring for potential interactions such as reduced color yield, bath instability, or altered oxide layer properties before full-scale implementation.
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