composition for hochtemperaturfeste, pyrolitisch keramisierende coatings

摘要

Composition for coatings that are resistant to high temperatures, and are converted to ceramics by pyrolysis, contains 35-60, preferably 40-50 wt.% embedded inorganic fillers, embedded in an elastomer matrix of the dimethylsiloxane or polyurethane group. The fillers comprise 1-8, preferably 3-5 wt.% silicon carbide (SiC) with an average particle size of 1-15, preferably 1-5 mu m, 20-50, preferably 30-45 wt.% amorphous silicon dioxide (SiO2) with an average particle size of 2-50, preferably 5-15 mu m and 0.5-5.0 wt.% highly disperse, hydrophilic metal oxides selected from SiO2, titanium dioxide (TiO2) and zirconium dioxide (ZrO2) with an average particle size of 0.01-2.0 mu m and also 0.5-6 wt.% carbon, ceramic and/or silicate fibres with an average length of 0.5-10, preferably 1-5 mm.