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2006-09-01 News Headlines
Celebrating 80 Years of Iron Oxide Pigments The majority of LANXESS synthetic iron oxide pigments go into the construction industry, followed by paints and coatings, and the plastics and paper industries.
For eighty years, iron oxide pigments from LANXESS have been adding color
to our day-to-day lives. Bayferrox* and Chrome Oxide pigments have been
proving their worth for decades in the coloring of a wide variety of products
such as concrete elements, roofing tiles, coatings, plastics, paper and
specialty pigments for toners and other applications. This was reason
enough for the Inorganic Pigments business unit to celebrate the anniversary
in Krefeld-Uerdingen with numerous customers and guests from politics
and industry. In the past 80 years, LANXESS has supplied 11 million tons
of iron oxides to customers all over the world. During the birthday celebrations,
a bag was pulled from the warehouse and used to break through the symbolic
barrier. If the 11 million tons were packed in the normal 25 kg bags and
placed alongside one another, they would cover a distance of some 264,000
kilometers thus circling the earth more than six and a half times. In the 1920s, Julius Laux, manager of the aniline plant at the Chemische Fabriken Weiler ter Meer in Uerdingen, began looking for possible uses for the iron oxide slurries that were produced as waste during the manufacture of aniline. In 1925, Laux discovered that the presence of salt solutions resulted in oxides with much higher color strength that were ideal for use as pigments. Production started just one and a half years after this discovery. What began in 1926 with sales of just under 1,200 tons a year expanded rapidly, and by 1927 over 5,000 tons of iron oxides were sold.
Shortly afterwards, synthetic iron oxides had gained a firm place for
themselves on the market and were used above all for the coloring of linoleum,
coatings and construction materials. In the 1960s, annual production increased
to over 100,000 tons. It was also at this time that the production of
micronized pigments began. These so-called M-grades can, for example,
be easily and evenly dispersed in coating formulations. The construction
industry also soon recognized the advantages of iron oxide Bayferrox* - global umbrella brand "Probably the most important advance with our products was the introduction of microgranules in the nineties. They allow dust-free handling and can be metered as a free-flowing powder," explains Wolfgang Schmitz, Head of the Inorganic Pigments business unit. Back in 1931, 25 colors were available, but the present range now comprises over 100 different shades. To simplify application in the construction industry, LANXESS has developed a color palette consisting of six base colors for additive color mixing. With a production capacity of around 300,000 tons a year, LANXESS is one of the world's leading manufacturers of synthetic iron oxides. "Our range of iron oxide brands also includes the Bayoxide* technical
oxides, the heat-stable Colortherm® pigments, and the specialty Bayscape*
pigments - wood chips colored with iron oxides for environmentally friendly
garden and landscape design as a colored alternative to bark mulch,"
said Schmitz.
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