Cement dispersant and concrete composition containing the dispersant
US7393886B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 25, 2004 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Nov 14, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/24
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A superior cement dispersant and a concrete composition containing the cement dispersant, the cement dispersant being a water-soluble amphoteric copolymer which contains an alkylene oxide adduct of a polyamide polyamine having an unsaturated group and at least two types of polyalkylene glycol ester. When the cement dispersant is compounded with a concrete composition, the dispersion performance thereof increases with time, and the concrete viscosity is effectively decreased. The cement dispersant composition contains a water-soluble amphoteric copolymer or the neutralized salt thereof as an essential component, which is obtained by copolymerizing an alkylene oxide adduct of a polyamide polyamine having an unsaturated group, (meta)acrylic acid or an alkali metal, ammonium, or alkanolamine salt thereof, an ester of an alkylene glycol and methacrylic acid, and an ester of an alkylene glycol and acrylic acid. In addition, the concrete composition containing the above cement dispersant is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.