Production of a self-supporting glass film
Assignee3M Innovative Properties Company
InventorToshihiro Kasai
Life of this patent
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Abstract
A process for the production of a self-supporting glass film is described. The method includes the steps of preparing a mixture containing a colloidal silica sol, at least one alkanolamine organic additive and an organic binder; coating the mixture onto a base material; drying the coated mixture to form a precursor film on the base material; releasing the precursor film from the base material; and firing the released precursor film to form a self-supporting glass film. Self-supporting glass films produced by the disclosed process are also described.
Claims8
A process for production of a self-supporting glass film, the process comprising the steps of:
- preparing a mixture, wherein the mixture comprises (a) a colloidal silica sol, wherein the colloidal silica is the only source of silicon in the mixture, (b) at least one alkanolamine organic additive in an amount equal to at least 10 wt % with respect to the inorganic solid content of silica in the mixture, and (c) an organic binder;
- applying the mixture onto a base material to form a coating;
- drying the coating to form a precursor film on the base material, wherein the precursor film is crack-free;
- releasing the precursor film from the base material;
- and
- firing the released precursor film to form a self-supporting glass film that is crack-free.
Dependencies are inferred from the claim text.