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Publication :CE Date :November, 1999 file=CE-106-12 Copyright :Copyright 1999 Chemical Week Publishing, LLC Volume :106 Issue :12 Page :19 Section :CHEMENTATOR
You can even eat this plastics stabilizer.
Sud-Chemie AG (Munich; 734), which has operated a pilot plant to make synthetic hydrotalcites for the plastics industry since 1998, is building a commercial plant at its Moorsburg site in southern Germany. When it starts up in 2000, the plant will expand capacity from the present 500 m.t./yr to 5,000 m.t./yr. Hydrotalcite is a naturally occurring mineral, known for its antacid properties. However, the natural form is not pure enough and the supply is insufficient for industrial applications, so Sud-Chemie has developed a proprietary process to make the mineral from salts of Mg and Al. The product has a layered structure, with carbonate ions or waters of hydration between the Mg and Al ions. The mineral can be modified by exchanging other ions, such as chloride, for the carbonate, says Joachim Grossmann, head of the plastics additives business unit.
Sud-Chemie now has two applications for its synthetic hydrotalcites in the plastics industry. One type is used as a stabilizer for polyvinyl chloride (PVC) during compounding and manufacturing.
Another neutralizes acidic catalyst residues in the production and compounding of polyolefins.
Grossmann says that although the stabilizer is more expensive than conventional lead-based stabilizers, it has the advantage over lead in that it is perfectly harmless. ``You can even eat it,'' he says.
Edited by Gerald Parkinson
They don't know povidone?
But what the heck, choose yourself for LSD/2C-B gelated eatable caps. Allways consistent 20 mg 2C-B and 50 mcg LSD.