Jörg Fuchs Alameda and team, Heraeus Precious Metals
Labels, medical tubes, baby pacifiers, and special paper coatings all have one thing in common: They contain silicones. High-quality silicones are produced from polysiloxanes using platinum-siloxane catalysts. Heraeus is the leading supplier of these special homogeneous catalysts, which must constantly be adapted to meet the market's evolving demands.
In order to coat paper with a thin layer of silicone, a major Chinese supplier to label manufacturers required a highly temperature-resistant catalyst with good storage stability and processability even at high ambient temperatures. Problem: The standard colorless catalyst slowly decomposes at higher temperatures.
A Heraeus team of German and Chinese developers has come up with a stable variation of the organometallic platinum-siloxane catalyst. The breakthrough involved adding a precisely measured quantity of a stabilizer. The new laboratory synthesis was successfully taken to production scale at Heraeus Shanghai.