Process for the preparation of expansible beads

Details Process for the preparation of expansible beads Process for the preparation of expansible beads

1976-07-01

1977-11-22

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Self-supporting particle making

65 22, 106 40V, 106 74, 106 75, 264 15, 264 43, C03B 1908, C03B 1910

Patent

active

040594238

ABSTRACT:
A process for the preparation of expansible beads which are convertible by firing into cellular glass bodies, such process comprising the steps of preparing a slip having a liquid medium continuous phase and a disperse phase, the slip containing particles of glass or glass-forming material, a cellulating agent, and a binder, the disperse phase of the slip including at least most of the particles, dividing the slip into drops, and subjecting the drops while in divided condition to a heat treatment including heating and cooling stages so as to cause evaporation of liquid from the drops and conversion thereof into self-sustaining beads in which the glass or glass-forming particles are held together by the binder and which contain the cellulating agent or gas derived therefrom.

REFERENCES:
patent: 2978339 (1961-04-01), Veach et al.
patent: 2978340 (1961-04-01), Veach et al.
patent: 3458332 (1969-07-01), Alford et al.
patent: 3532480 (1970-10-01), D'Eustachio
patent: 3699050 (1972-10-01), Henderson

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