SGL Carbon Group

Graphite is offered moreover in flexible sheets (e.g. Sigraflex of the SGL-Carbon Group). This is primarily a sealing material, but it is suitable also as electrode or corrosion resistant current feeder (erosion in case of gas evolution is possible). 

Data sheet from SGL Carbon Group, SIGRASIC 6010 GNJ — Faserverstarkte Keramik fiiir Bremsscheiben (1998). 

Figure 2.11 Typical manufacturing process for molded graphite. Source Reprinted from SGL Carbon Group technical literature, Carbon and Graphite Manufacture and Properties, 1995.

SGL Carbon Group, http //www.sglcarbon.com/sgl t/fibers/sigra c.html. 

Mandle, M. and WUde, R, SGL Carbon Group, SGL TECHNOLOGIES GmbH, Private communication, 2001. 

Decarboxylations can be regarded as reversals of the addition of carbanions to carbon dioxide (16-82), but free carbanions are not always involved. When the carboxylate ion is decarboxylated, the mechanism can be either Sgl or Se2. In the case of the Sgl mechanism, the reaction is of course aided by the presence of electron-withdrawing groups, which stabilize the carbanion. Decarboxylations of carboxylate ions can be accelerated by the addition of a suitable crown ether, which in effect removes the metallic ion. ° The reaction without the metallic ion has also been performed in the gas phase. But some acids can also be decarboxylated directly and, in most of these cases, there is a cyclic, six-center mechanism ... 

We can focus on a few of the most innovative end uses. Some of the most exciting and high profile applications are in the BMW i3, which is one of the world s first purpose-designed electric vehicles. The BMW i3 makes extensive use of composite materials in its body structure. In addition, SGL Automotive Carbon Fibres, a joint venture between SGL Group and the BMW Group, converts recycled carbon fibres into non woven fabrics. These are converted into components, such as the roof of the BMW i3, using the resin transfer moulding process [10]. 

SGL Automotive Carbon Fibers (ACF), tbe Joint Venture between tbe BMW Group and SGL Group, www.sglacf.com/en.btml. 

The importance of composite technologies has been recognised by the major trend for major end producers forming joint venture partnerships with material and processing providers. The most visible has been the innovation partnership between BMW Group and SGL Group. This started with carbon fibres and carbon fibre fabrics in the BMW i model and is now moving into mainstream components for models such as the BMW 7 series. 

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