Process for the preparation of expansible beads

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

C - Chemistry, Metallurgy

03

B

261/2, 49/77

C03B 19/08 (2006.01) C03B 19/10 (2006.01) C03C 11/00 (2006.01)

Patent

CA 1073473

ABSTRACT OF THE DISCLOSURE 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 subject- ing 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-sus- taining 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.

256549

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