Degussa Aktiengesellschaft

Klaus Lutz

Karl-Anton Starz

Harry Schiwiora

Jurgen Hausselt

Manfred Stumke

Werner Leske

Harry Mueller

Hans-Joachim Baer

Membrane keyboards are manufactured using screen-printable, electrically conductive pastes consisting of 40 to 75% by weight of metal powder (silver, aluminum, copper and their mixtures), 5 to 55% by weight of an organic solvent and 5-20% by weight of and synthetic resin based on a thermoplastic epoxy or phenoxy resin with an average molecular weight of 10,000 to 250,000 and an epoxide content of 0 to 1.

Screen-printable paste for manufacturing electrically conductive coatings

There are applied gold containing preparations as intermediate layers for facing fired on alloys with ceramic compositions in the dental art. These gold preparations should improve the adhesiveness, form a structured surface and make possible a saving in the consumption of gold. This is accomplished with preparations that contain 60 to 95% gold powder, at least 50% of which are platelet shaped particles, 5-40% of a binder and in a given case up to 20 of a powder as an adhesive which is made of metals and/or non-metals.

Gold containing preparation for coating metallic parts (II)

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Rodenbach, Germany

Klaus Lutz