Fluidity control of cementitious compositions
US5661206A · kind A · utility
98Cited by
12References
17Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Dec 21, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Dec 21, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/50
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An admixture for modifying the fluidity of a cementitious mixture comprises a cement-dispersing agent which is an aqueous solution of polymer, in which solution an oxyalkylene-based defoaming agent is dissolved or dispersed in particles of no greater that 20 .mu.M diameter. The polymer is preferably a polymer which comprises units derived from unsaturated carboxylic acid monomer and the polymer is preferably prepared in the presence of the defoaming agent. Particular addition copolymers give particularly good results. The admixture permits good control of the fluidity of cementitious compositions and has extended shelf life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.