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1. (WO2017040900) METHOD OF MAKING HOLLOW GLASS MICROSPHERES

Pub. No.:    WO/2017/040900    International Application No.:    PCT/US2016/050063
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Sep 03 01:59:59 CEST 2016
IPC: C03C 11/00
C03B 19/10
Applicants: 3M INNOVATIVE PROPERTIES COMPANY
Inventors: DOERING, Marcel
FRIEDRICH, Stefan
GANGNUS, Bernd
HINTZER, Klaus
QI, Gang
WOLFF, Friedrich M.
ZIPPLIES, Tilman C.
CHANDLER, Blake E.
Title: METHOD OF MAKING HOLLOW GLASS MICROSPHERES
Abstract:
Provided are methods of manufacturing hollow glass microspheres where a feed composition comprising a glass powder and a blowing agent entrained in the glass powder is introduced into an opening at a first end of a vertically-aligned furnace. Agglomerated glass, unmelted oxides, or natural glassy materials can be used in place of, or in addition to, the glass powder in the feed composition.