Material for cement, and cement
US8172939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2007 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Sep 1, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L27/12
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A material for cement which comprises a calcium salt powder with an inositol phosphate and/or a salt thereof as adsorbed on the surface thereof, the powder having a specific surface area of 60-120 m2/g. A method of producing a material for cement comprises the step of mixing a calcium ion-containing solution adjusted to alkalinity with a phosphate ion-containing solution to produce a precipitate, the step of maturing the precipitate-containing system while maintaining the alkalinity to obtain a calcium salt powder, the step of recovering the calcium salt powder and drying the same, and the step of immersing the dried calcium salt powder in a solution containing an inositol phosphate and/or a salt thereof to cause the inositol phosphate and/or salt thereof to be adsorbed on the surface of the calcium salt powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.