Kali-Chemie Aktiengesellschaft

Solvay Deutschland Gmbh

Dlr Deutsche Zentrum Fur Luft Und Raumfahrt E.v. Linder Hohe

Lutz Mayer

Wolfgang Habel

Peter Sartori

Bilge Saruhan-Brings

Baudouin Van Aefferden

Hartmut Schneider

Peter Satori

Thomas Adrian

Christopher Nover

The present invention relates to a process for coating high-temperature-resistant fibrous materials with metal aluminates. The disclosed process includes immersing the starting fibrous material in a sol derived from at least two compounds: a compound of cerium or lanthanum and a compound of aluminum, to deposit a coating of metal aluminate on the fibrous material. The compounds of cerium, lanthanum and aluminum are selected from nitrates, acetates, oxalates and acetylacetonates. After the immersion, the fibrous material is removed from the sol after it is wetted, dried at temperatures of less than 400 degrees C. for at least 1 hour under pressure of less than or equal to 5 mbar and the fibrous material is introduced into a desired matrix at a temperature of more than 600 degrees C.

Process for coating oxidic fibrous materials with metal aluminates for

Halogenated polycarbosilanes with uniform or mixed halogenation prepared from aryl-substituted, particularly phenyl-substituted polycarbosilanes by reaction with halogenating reagents under polar or ionic reaction conditions, optionally in the presence of a Lewis acid catalyst. The halogen atom introduced can optionally subsequently be replaced by another halogen atom through a transhalogenation reaction.

Halogenated polycarbosilanes and processes for preparing them

Polycarbosilanes in which some of the silicon atoms have been replaced by a hetero element selected from boron, titanium, zirconium, hafnium, etc. The hetero elements are incorporated into the polycarbosilane skeleton in such a way that, like the silicon atoms, they are bonded to the other parts of the polycarbosilanes via hydrocarbon bridges, and the polycarbosilanes are free of hetero element-oxygen-silicon bonds.

Polycarbosilanes containing a hetero element

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Duisburg, Germany

Lutz Mayer