Calcium sulphate-based products
US10988413B2 · kind B2 · utility
0Cited by
7References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 2018 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Feb 2, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/28
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
This invention relates to improved high temperature resistant calcium sulphate-based products e.g. gypsum wallboard products and, in particular, to products having reduced shrinkage at high temperatures. The invention provides calcium sulphate-based product comprising gypsum and a shrinkage resistance additive. The shrinkage resistance additive is melamine polyphosphate or melamine pyrophosphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.