Reuse of paint-saturated alkaline earth metal carbonates
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United States of America Patent
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Sep 1, 2020
Grant Date -
Apr 21, 2016
app pub date -
Dec 29, 2015
filing date -
Jun 21, 2013
priority date (Note) -
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Abstract
Methods are provided for beneficially reusing a paint-saturated filter aid, such as paint-saturated alkaline earth metal carbonates, as a substitute in applications requiring virgin alkaline earth metal carbonates. The paint-saturated filter aid is prepared by re-milling paint-saturated filter aid to a predetermined size to produce re-milled particles suitable for reuse in a variety of applications, including flooring, concrete, and the like. Also provided are flooring materials including re-milled particles of a paint-saturated filter aid characterized by one or more of: a median particle size (D50) of about 1 to about 50 microns; less than about 5% of the re-milled particles being retained on a 200 mesh screen; or a top cut size (D90) of about 5 to about 300 microns.
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