Substrate smoothed by coating with gypsum-containing composition and method of making
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United States of America Patent
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May 25, 2004
Grant Date -
Jul 17, 2003
app pub date -
Dec 21, 2001
filing date -
Dec 21, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A rough-surfaced substrate, such as a fiberboard, is provided with a smoother surface by applying a coating comprising calcium sulfate hemihydrate which has been prevented from hydrating to gypsum by set preventer, and which sets when brought into contact with a set initiator, e.g. aluminum sulfate, preferably present on the surface of the substrate.
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Cited Art Landscape
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