| 摘要 |
The invention relates to a process for preparing a stable sol-gel solution comprising, in succession, the following steps: a) preparing a sol-gel solution by bringing one or more molecular metal and/or metalloid precursors into contact with a medium comprising an organic solvent; b) adding at least one mercaptoorganosilane compound to the solution obtained in a); c) hydrolyzing the solution obtained in b); and d) adding, to the solution obtained in c), one or more complexing agents chosen from carboxylic acids, beta-diketone compounds and hydroxamate compounds. Use of this solution for forming coating materials for metallic substrates, in particular for a silver-based substrate, such as mirrors
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