Plaster-based prefabricated structural element exhibiting water resistance
US6569541B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2000 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Feb 10, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31996
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A water-resistant prefabricated structural element comprising a substrate based on cured plaster, said substrate being able to be obtained by at least the following steps:(a) homogeneously mixing a dry material, comprising mostly at least one hydratable calcium sulfate, a water-repellent agent comprising at least one silicone compound, and water and preforming said substrate in the wet state;(b) drying the preformed substrate in order to obtain said substrate formed in the solid and dry state;wherein the homogeneous mix, prior to the preforming of the substrate in the wet state, also includes a mineral additive comprising at least one mineral component having a synergistic water-repellency affinity with said silicone compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.