SEM picture of Alcamizer P93Hydrotalcite is a Layered Double Hydroxide whose name is derived from its resemblance with talc and its high water content. Layered double hydroxides (LDH) comprise an unusual class of layered materials with positively charged hydroxide layers and charge balancing, mobile anions located in the interlayer region. This structure gives these material anion-exchange properties. The natural form of hydrotalcite is mined in small quantities in the Snarum area of Norway and the Ural area of Russia. Carl Christian Hochstetter (1842) was the first to report about hydrotalcite, which was attached firmly to a schist. He described a white material with a pearl like luster, with the formula Mg6Al2(OH)16CO3 . 4H2O.

Kyowa Chemical Industry of Japan (Kyowa) noticed the unique structure of hydrotalcite and became the first in the world to succeed in the industrial synthesis of the material in 1966. Shortly after that, Kyowa's synthetic hydrotalcite found its way to the pharmaceutical industry, where it was applied as an antacid agent. Today, the material is sold by globally known pharmaceutical firms and continues to be widely supplied to various nations all over the world.

Following the successful introduction of hydrotalcite in the pharmaceutical industry, Kyowa and its subsidiaries succeeded in developing new applications for its synthetic hydrotalcites. One of the most noteable results is the largescale usage of hydrotalcite by the global plastic production and processing industry. Traditionally, plastic compounds used to contain heavy metal stabilizers. However adverse effects on the human body, environmental destruction, etc. of such heavy metals had lead to critisicm which opened the way to more environmentally friendly stabilizer systems in which our synthetic hydrotalcites play a pivotal role.

An enormous amount of research is dedicated to study synthetic hydrotalcite and its suitability for applications including, but certainly not limited to, anti-corrosion, catalysis, encapsulation, controlled release and water technology. Kisuma Chemicals and Kyowa Chemical Industry are at the forefront of this development, offering support to innovation where possible. We are technically and commercially interested in all developments concerning these environmentally friendly materials.

If you would like to know more about this class of materials, to exchange ideas on an academic level, or to receive samples of our industrially relevant materials, please do not hesitate to contact our R&D department.


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