Binders for coatings

摘要

The present invention relates to a method of producing a silica glass coating comprising the steps of: a) producing a sol comprising colloidal silica and an organic binder; b) forming a coating of said sol on a substrate; c) drying the sol coating so as to produce a gel coating on said substrate; and d) densifying the gel coating so as to produce a substantially crack-free glass coating. In accordance with the present invention there is used a cellulose based binder which enables the use of substantially reduced levels. of binder.