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Through targeted “debottlenecking” at the Krefeld-Uerdingen site, the specialty chemicals company has increased the product availability of its Bayferrox and Colortherm micronized red pigments by more than 5,000 metric tons per year. “In the paints and coatings industry and also for plastics applications, we see a continuously rising demand for high quality pigments which offer good dispersion characteristics. We have therefore increased product availability for our customers,” says Holger Hüppeler, head of the LANXESS Inorganic Pigments business unit.
Due to their properties, micronized iron oxide pigments from LANXESS 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. In addition, they provide high color strength and color consistency.
Unrivalled properties for grinding and temperature stability
LANXESS 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 much 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. This results in particularly stable pigments which, after a subsequent milling process, have unique properties which distinguish them from all other iron oxide pigments available on the market in two essential respects:
Micronized red pigments from the Laux process have the highest milling stability. Even when subjected to high shear forces during the dispersion process, they show excellent resistance to color change.
These pigment types also lead in terms of temperature stability. They are thermally stable even up to temperatures of 800 °C, while red pigments (hematite, Fe2O3) produced using other manufacturing processes are typically only resistant up to a maximum of 400 °C. Due to the high temperatures applied during calcination in the Laux process, all water inclusions that can promote a color shift are displaced from the oxide crystal lattice. For this reason, micronized red pigments from LANXESS do not display a color shift in use, even at extremely high application temperatures.
For detailed information on LANXESS’s range of products for the paints and coatings industry, go to bayferrox.com/.
The Inorganic Pigments business unit is part of LANXESS’s Performance Chemicals segment, which achieved sales of EUR 1.44 billion in 2017.
Forward-Looking Statements
This company release contains certain forward-looking statements, including assumptions, opinions, expectations and views of the company or cited from third party sources. Various known and unknown risks, uncertainties and other factors could cause the actual results, financial position, development or performance of LANXESS AG to differ materially from the estimations expressed or implied herein. LANXESS AG does not guarantee that the assumptions underlying such forward-looking statements are free from errors nor does it accept any responsibility for the future accuracy of the opinions expressed in this presentation or the actual occurrence of the forecast developments. No representation or warranty (expressed or implied) is made as to, and no reliance should be placed on, any information, estimates, targets and opinions, contained herein, and no liability whatsoever is accepted as to any errors, omissions or misstatements contained herein, and accordingly, no representative of LANXESS AG or any of its affiliated companies or any of such person's officers, directors or employees accept any liability whatsoever arising directly or indirectly from the use of this document.
LANXESS (lanxess.com) is a leading specialty chemicals company with sales of EUR 9.7 billion in 2017 and about 19,200 employees in 25 countries. The company is currently represented at 74 production sites worldwide. The core business of LANXESS is the development, manufacturing and marketing of chemical intermediates, additives, specialty chemicals and plastics. LANXESS is listed in the leading sustainability indices Dow Jones Sustainability Index (DJSI World and Europe) and FTSE4Good.
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