Synthetic microspheres and methods of making same
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United States of America Patent
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Jan 26, 2010
Grant Date -
Apr 29, 2004
app pub date -
Aug 25, 2003
filing date -
Aug 23, 2002
priority date (Note) -
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Abstract
A building product incorporating synthetic microspheres having a low alkali metal oxide content is provided. The synthetic microspheres are substantially chemically inert and thus a suitable replacement for cenospheres derived from coal combustion, particularly in caustic environments such as cementitious mixtures. The building product can have a cementitious matrix such as a fiber cement product. The synthetic microspheres can be incorporated as a low density additive and/or a filler for the building product and/or the like.
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