Additives for hydraulic cement compositions
US5294256A · kind A · utility
18Cited by
19References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Jul 28, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/27
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides additives for hydraulic cement compositions, particularly masonry cements, which improve the water-repellancy, workability, and board life of said compositions. The additives of the invention comprise a water-insoluble, water-repelling acid, a set retarding composition, an emulsifier, and a polymer selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, hydroxypropyl substituted polysaccharides, and mixtures thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.