Hydroxamated polymers as additives for retarding the rate of set of hydraulic cement compositions
US4810296A · kind A · utility
5Cited by
4References
8Claims
0Family size
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Key dates
| Filing date | Feb 16, 1988 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Feb 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2103/22
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The rate of set of an aqueous slurry of hydraulic cement can be retarded by means of an additive comprising a water-soluble polymer which contains hydroxamic acid pendant groups. Hydroxamated acrylamide polymers and copolymers are preferred additives for retarding set in cement slurries.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.