Preparation of gypsum compositions
US7070648B1 · kind B1 · utility
21Cited by
7References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2005 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Jun 16, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A gypsum composition containing a sulfonate-containing comb-branched copolymer is disclosed. The sulfonate-containing comb-branched copolymer comprises recurring units of a polyether macromonomer, an acrylic monomer, and a sulfonate monomer. The sulfonate-containing comb-branched copolymer not only increases the fluidity of gypsum slurry but also has reduced retardation on the gypsum setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.