Process and binder for the manufacture of ceramic shells for use as molds
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United States of America Patent
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-
Feb 21, 1995
Grant Date -
N/A
app pub date -
Jan 17, 1992
filing date -
Jan 19, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
For the manufacture of quickly drying dip coats whose drying time is comparable to the drying time of shells produced on the basis of alcoholic binders, the process uses as a binder for the dip a dispersion of aqueous colloidal silica sol to which synthetic high polymers and/or an emulsion from the group of silicon-organic compounds is formed which after drying is impermeable to water but permeable to water vapor.
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