Pigments for Specialties

Important properties such as coercivity and remanence of a toner depend to a certain extent on the type of system used in the copier. The high-performance Bayoxide® E 8700 grades have a particularly narrow particle size distribution, defined particle shape and made-to-measure magnetic properties. To satisfy the requirements of virtually any type of machine, LANXESS offers products in the ranges of 55 Oe, 100 Oe and 125 Oe. Due to a low heavy metal content, all toner oxides meet the requirements of the Japanese “Eco Mark” and the German “Blue Angel”.

Furthermore, the LANXESS portfolio comprises pigment solutions providing further unique features. For example, high coercive needle-shaped magnetites are required for M.I.C.R. (Magnetic Ink Character Recognition) toners for document printing. Our Bayoxide® E 8840 product is an acicular, magnetic iron oxide black pigment. It has a very high coercivity of 375 Oe and is particularly suited for the production of M.I.C.R. toners that are used for the printing of machine-readable checks and security documents.

The quality of the resulting LFP is highly influenced by the chemical and morphological properties of the iron oxide precursor. The tailor-made product line Bayoxide® E B meets the specific technical requirements of our customer and increases the efficiency of the LFP production process. For example, we use an optimized precipitation process based on selected raw materials, which enables the production of iron oxides with a narrow particle size distribution and of high purity. As a consequence, Bayoxide® E B products show an increased level of reactivity leading to an accelerated carbothermic reduction process.

Our Bayoxide® E products were developed for use in the chemical production of catalysts, for example in styrene synthesis. Since LANXESS operates a complete technology portfolio, we cover the full spectrum of synthetic iron oxide solutions. Thus, we are able to provide tailor-made products that fit perfectly to our customer’s process requirements.

Bayoxide® E products are of highest purity; all grades can be produced within very narrow specifications, e.g. regarding particle size distribution and crystal shape. LANXESS technical experts provide detailed support to our customers in selecting the perfect iron oxide solution for their specific application.

Bayoxide® C GN-R is used in particular for the production of refractory bricks in the glass and steel industry, either in pure form or as a component of oxide systems. Compared to competitive products, LANXESS chromium oxides are characterized by their unique morphological and surface chemical properties, which make it possible to produce refractory bricks with a particularly high density and high strength.

The high reactivity up to 1,000 °C of Bayoxide® chromium oxides  is of particular importance during this process. The products are of high purity due to extremely precise control of particle morphology and particle size distribution during the manufacturing process and can be offered with very narrow specifications. 

One of the primary applications for our inorganic pigments is the bulk coloring of impregnated and pressed laminate paper, which is mainly used in the furniture and flooring industry. Since the paper industry places particularly high demands on the quality consistency of colorants, these Bayferrox® pigment grades are pre-tested by our QC laboratories specifically in laminate paper & according to special quality standards.

Another application is the coloration of paper for cigarette filter tips. Since the heavy metal content of pigments is regulated in many countries, LANXESS offers its high-purity Bayferrox® Z-Grades, which are specially certified to have no harmful chemicals and substances and are authorized for direct skin contact.

In addition to their coloring effect, LANXESS pigments provide further decisive benefits. For example, our pigments for paper applications are also available in water-repulpable bags. The sealed bags can be added directly to the pulper. Thus, the risk of any dust during the production process can be avoided and occupational hygiene is guaranteed. The pallets are marked with the quality label "Tested Paper Quality". All deliveries are accompanied by a certificate of analysis which lists the data of the particular batch.

Bayferrox® powder pigments have been the preferred choice for coloring fertilizers and seeds for many years due to their property profile. Our synthetic iron oxide yellow and red pigments are easily dispersible and are characterized by high color intensity and covering power. In direct comparison to organic pigments, Bayferrox® products are much more cost-effective and have a high weather stability, so that the color is retained for a long time even after the seed or fertilizers have been sown.

What’s more, LANXESS iron oxide pigments are non-hazardous. In chemical terms, they are comparable with naturally occurring iron oxides. With regard to their color, however, they are superior to their natural counterparts due to their higher purity and particle morphology.