Multi-layer coatings to increase water and grease resistance of porous materials and materials having such protection
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United States of America Patent
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Issued Date -
Jan 3, 2008
app pub date -
Jun 29, 2006
filing date -
Jun 29, 2006
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Abandoned
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Abstract
A method of improving gas, water, water vapor, and/or grease resistance of a porous material is disclosed which comprises treating the material with a first treatment agent followed by the application of wax and poly(vinyl alcohol) and optionally a polyamine. Porous materials that have a multi-layer coating that includes a first coating of a first treatment agent and a second coating of wax, poly(vinyl alcohol), and optionally a polyamine are also disclosed.
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