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Germany: Micronized Iron Oxide Red Pigments

Lanxess Boosts Production of Micronized Red Pigments

| Editor: Alexander Stark

Due to their properties, micronized iron oxide pigments from Lanxess are mainly used in technically demanding paints and coating systems and for coloring plastics.
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Due to their properties, micronized iron oxide pigments from Lanxess are mainly used in technically demanding paints and coating systems and for coloring plastics. (Source: Lanxess)

Through targeted “debottlenecking” at the Krefeld-Uerdingen site, Lanxess could increase the product availability of its Bayferrox and Colortherm micronized red pigments by more than 5,000 metric tons per year.

Cologne/Germany —In the paints and coatings industry and also for plastics applications, the speciality chemicals company sees a continuously rising demand for high quality pigments which offer good dispersion characteristics. That is why the supplier increased product availability in this field.

Due to their properties, these micronized iron oxide pigments are mainly used in technically demanding paints and coating systems and for coloring plastics. The micronization process is characterized by intensive milling in which the proportion of agglomerates is significantly reduced. Micronized pigments can thus be more readily dispersed, the company explains. In addition, they provide high color strength and color consistency.

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The manufacturer uses its proprietary Laux process to manufacture Bayferrox and Colortherm red pigments at its site in Krefeld-Uerdingen, Germany. Black pigments are heated up to 800 °C and oxidized to red pigment. Since the Copperas process, which was an alternative, is no longer used worldwide on a market-relevant scale, the more environmentally friendly Laux process is the only production process applied for iron oxide red pigments that includes a calcination step at very high temperatures, the company claims. This results in particularly stable pigments which, after a subsequent milling process, have unique properties.

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