Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing
Reexamination Certificate
2007-09-25
2007-09-25
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Inorganic settable ingredient containing
C106S691000, C424S603000, C623S023620
Reexamination Certificate
active
11006326
ABSTRACT:
Calcium-strontium-hydroxyphosphate (strontium-apatite-) cement preparations are described, comprising a powder mixture, which contains molar quantities of the components calcium (Ca), strontium (Sr) and phosphate (P) in the mixture in the ranges 1.00<Ca/P≦1.50 and 0<Sr/P<1.5, together with an alkali salt or an ammonium salt of phosphoric acid, and with water and/or an aqueous solution. The powder mixture particularly contains, as the Ca-component, Ca3(PO4)2(TCP), and as the Sr-component SrHPO4and/or Sr3(PO4)2and optionally additional SrCO3. As the aqueous mixing solution for the formation of the strontium-apatite cement, an aqueous solution of an alkali salt or an ammonium salt of the phosphoric acid is suitable.
REFERENCES:
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patent: WO96/14265 (1996-05-01), None
Brown, Walter E. et al.; “A new calcium phosphate, water-setting cement”; 1986,Chem. Res. Prog., pp. 352-379.
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