Substrate smoothed by coating with gypsum-containing composition and method of making
US6740395B2 · kind B2 · utility
9Cited by
16References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2001 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Jun 4, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2533
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rough-surfaced substrate, such as a fiberboard, is provided with a smoother surface by applying a coating comprising calcium sulfate hemihydrate which has been prevented from hydrating to gypsum by set preventer, and which sets when brought into contact with a set initiator, e.g. aluminum sulfate, preferably present on the surface of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.