Spray insulating coating for refractory articles
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United States of America Patent
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Aug 31, 1999
Issued Date -
N/A
app pub date -
Jan 9, 1998
filing date -
Mar 1, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to an insulating coating for refractory articles, adapted to be applied by spraying or gunning, which is easy to apply, cost effective, eliminates the potential health hazards associated with ceramic fiber paper, and which imparts sufficient insulating properties to the refractory article in high temperature environments. More particularly, the present invention is directed to an insulating coating and a method of preparing the insulating coating wherein the coating composition is comprised of about 25% to about 75% by weight of lightweight aggregate, up to about 25% to about 75% by weight of binder, up to 0.5% by weight of organic fiber, up to about 15% by weight of an additive to improve green strength, and up to about 5% by weight of a foaming agent.
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