Building materials, compositions, and methods

摘要

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.

主权项

1. A sound dampening composition, comprising a plaster, polyvinyl butyral, and a material selected from the group consisting of barium salts, high atomic weight materials, high molecular density materials, and combinations thereof,
wherein the high atomic weight materials and the high density materials are selected from the group consisting of calcium silicate, zinc oxide, lead, zirconium dioxide, carbonyl iron powders, aluminum powder, iron powder, stainless steel powder, copper powder, bismuth powder, tungsten powder, bismuth oxide powder, niobium powder, tantalum powder, molybdenum powder, Borated HDPE, fly ash class C, and combinations thereof.