Building board and method of forming the building board
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United States of America Patent
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Dec 8, 2020
Grant Date -
Oct 5, 2017
app pub date -
Mar 31, 2017
filing date -
Apr 1, 2016
priority date (Note) -
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Abstract
A building board including a cementitious layer between two fiber mats. At least one fiber mat forms with a polymer film a fiber mat/polymer film laminate. The cementitious layer of the building board contains a reactive water-insoluble polymer which improves binding of the fiber mat/polymer film laminate to the cementitious layer. The building board has a low water absorption and a high level surface finish.
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