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1. (US4218230) Method of glass strengthening by ion exchange

Office : United States of America
Application Number: 05930938 Application Date: 04.08.1978
Publication Number: 4218230 Publication Date: 19.08.1980
Grant Number: 4218230 Grant Date: 19.08.1980
Publication Kind : A
IPC:
C03C 21/00
C CHEMISTRY; METALLURGY
03
GLASS; MINERAL OR SLAG WOOL
C
CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
21
Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals into the surface
Applicants: Brockway Glass Company, Inc.
Inventors: Hogan Patrick M.
Agents: Christel, Bean &; Linihan
Priority Data:
Title: (EN) Method of glass strengthening by ion exchange
Abstract: front page image
(EN)

A method for strengthening a sodium lime silicate type glass body by substituting potassium ions for sodium ions in a surface layer of glass by spraying an aqueous solution of potassium ions and from 1 to 6 weight percent of sodium ions upon the glass at a temperature of from about 200.degree. C. to just below the annealing point of the glass.