Treatment of glass to reduce venting during thermal treatment an

Details Treatment of glass to reduce venting during thermal treatment an Treatment of glass to reduce venting during thermal treatment an

1985-10-08

1989-04-25

Kellogg, Arthur

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Structurally defined web or sheet

Including aperture

65 28, 65 36, 65 608, 428140, 428409, 428410, C03B 2302, C03B 2326

Patent

active

048247120

ABSTRACT:
A method and composition for coating scored regions or holes in glass articles prior to heat treatment in order to maintain residual compressive stresses and reduce venting are disclosed. The method and composition of the present invention utilize silica-containing sols which gel and density and ultimately form glassy films during the heat treatment of the coated glass articles.

REFERENCES:
patent: 3287201 (1966-11-01), Chisholm et al.
patent: 3498773 (1970-03-01), Grubb et al.
patent: 3765859 (1973-10-01), Seymour
patent: 4416930 (1983-11-01), Kelly
Falleroni et al., p. 713-General Inorganic Chemistry by Sneed et al., 1942, Van Nostrand Co.

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