Production of fire resistant laminates
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United States of America Patent
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-
Feb 26, 2008
Grant Date -
Oct 2, 2003
app pub date -
Sep 17, 2001
filing date -
Sep 20, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Process for the production of an intumescent fire resistant layer by drying a waterglass solution on the surface of a glass substrate are carried out in the presence of a salt of a carbonic acid or an .alpha.-hydroxy carboxylic acid such as potassium citrate. The drying is preferably carried out at a rate which reduces of pH of the solution by no more than 2 units during an initial drying period of 5 hours. The resulting interlayers provide improved fire resistance.
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