Etching glass with HF and fluorine-containing surfactant

Details Etching glass with HF and fluorine-containing surfactant Etching glass with HF and fluorine-containing surfactant

1976-07-30

1977-10-25

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156903, 252 793, 252 794, C03C 1500, C03C 2506

Patent

active

040554589

ABSTRACT:
In the etching of glass wherein glass is contacted with an aqueous etching bath containing hydrofluoric acid, and the glass is thereafter removed from the bath and rinsed, the improvement which comprises dissolving in the etching bath an acid-resistant wetting agent. Preferably the wetting agent contains fluorine, e.g. a perfluoralkane sulfonic acid quaternary ammonium salt, a perfluoralkane carboxylic acid salt, an alkoxylation product of a perfluoralkane sulfonamide, or the like.

REFERENCES:
patent: 2118386 (1938-05-01), Swinehart
patent: 3383255 (1968-05-01), Rossi et al.

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