Building materials, compositions, and methods
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United States of America Patent
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Nov 22, 2016
Grant Date -
Apr 23, 2015
app pub date -
Dec 30, 2014
filing date -
Dec 20, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Building materials include a dampening layer which contains a plaster and a viscoelastic polymer, such as polyvinyl butyral. The dampening layer may also include a barium salt. Methods of making a sound dampening material include providing a plaster mixture. The mixture may include a viscoelastic polymer and/or a barium salt. The plaster mixture is combined with water and/or a viscoelastic polymer dispersion, to form a slurry. The slurry is applied to a surface and set to form a sound dampening layer.
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