TOP > 外国特許検索 > Material for cement, and cement

Material for cement, and cement

外国特許コード F130007251
掲載日 2013年4月2日
出願国 アメリカ合衆国
出願番号 06322007
公報番号 20100132593
公報番号 8172939
出願日 平成19年9月18日(2007.9.18)
公報発行日 平成22年6月3日(2010.6.3)
公報発行日 平成24年5月8日(2012.5.8)
国際出願番号 JP2007068031
国際公開番号 WO2008090648
国際出願日 平成19年9月18日(2007.9.18)
国際公開日 平成20年7月31日(2008.7.31)
優先権データ
  • 特願2007-014536 (2007.1.25) JP
  • 2007WO-JP68031 (2007.9.18) WO
発明の名称 (英語) Material for cement, and cement
発明の概要(英語) (US8172939)
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.
特許請求の範囲(英語) [claim1]
1. A material for cement, characterized in that: it comprises a calcium salt powder with an inositol phosphate and/or a salt thereof as adsorbed on the surface thereof; and
the powder has a specific surface area of 60-120 m2/g after adsorption,
wherein the calcium salt is hydroxyapatite,
wherein the inositol phosphate is phytic acid (inositol hexaphosphate).
[claim2]
2. The material for cement according to claim 1, wherein the hydroxyapatite powder shows a (002) plane half width of 0.30-0.45 deg. as determined by X ray diffractometry.
[claim3]
3. The material for cement according to claim 1, wherein the powder has a median diameter within the range of 5-20 mu m and the content of particles having a diameter of 3-50 mu m is not lower than 60% by volume of the whole powder.
[claim4]
4. A method of producing the material for cement according to claim 1, characterized in that it 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 hydroxyapatite powder;
the step of recovering the hydroxyapatite powder and drying the same; and
the step of immersing the dried hydroxyapatite powder in a solution containing phytic acid and/or a salt thereof to cause the phytic acid and/or salt thereof to be adsorbed on the surface of the hydroxyapatite powder.
[claim5]
5. The method of producing the material for cement according to claim 4, wherein the precipitate-containing system is maintained at a temperature of 20-70 deg. C. to obtain the hydroxyapatite powder.
[claim6]
6. The method of producing the material for cement according to claim 4, wherein the step of recovering and drying the hydroxyapatite powder is carried out in the manner of freeze drying or drying by heating at 50-150 deg. C.
[claim7]
7. The method of producing the material for cement according to claim 4 which further comprises the step of pulverizing the dried hydroxyapatite powder.
[claim8]
8. The method of producing the material for cement according to claim 7, wherein the step of pulverizing is carried out in the manner of wet pulverization using a vessel-driven medium mill.
[claim9]
9. The method of producing the material for cement according to claim 1, characterized in that it comprises: the step of mixing a calcium ion-containing solution adjusted to alkalinity, a phosphate ion-containing solution and a solution containing phytic acid and/or a salt thereof together to produce a precipitate; and
the step of maturing the precipitate-containing system while maintaining the alkalinity to obtain a phytic acid-carrying hydroxyapatite powder,
wherein the powder has a specific surface area of 60-120 m2/g after adsorption.
[claim10]
10. A cement characterized in that it is produced by kneading the material for cement according to claim 1 with an aqueous solvent, followed by hardening.
[claim11]
11. The cement according to claim 10 which has a compression strength, after hardening, of not lower than 14 MPa.
[claim12]
12. The cement according to claim 10, wherein the kneading of the material for cement with the aqueous solvent is carried out with a mixture ratio by weight (solid to liquid ratio) between 1/0.31 and 1/0.45.
  • 発明者/出願人(英語)
  • AIZAWA MAMORU
  • HORIGUCHI YUKIKO
  • MEIJI UNIVERSITY
国際特許分類(IPC)
米国特許分類/主・副
  • A61L027/12
掲載中の発明について更に詳しい内容の説明を御希望の際は、お気軽にお問い合せください。

PAGE TOP

close
close
close
close
close
close