Cement dispersion agent
US4786331A · kind A · utility
8Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1987 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Jul 13, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B28/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cement dispersion agent comprising calcium polystyrene sulfonate having a weight average molecular weight of 5,000 to 50,000 and having a sulfonation degree of 80% or more. Further, a cement dispersion agent comprising (a) a polystyrene sulfonate and (b) at least one component selected from the group consisting of hydroxycarboxylic acids, ketocarboxylic acids, and the salts thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.