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AssigneeNgk Spark Plug Co., Ltd.
InventorsTakenori Sawamura, Masateru Hattori, Masahiko Okuyama
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A calcium phosphate cement and a calcium phosphate cement composition are disclosed. The calcium phosphate cement comprises a calcium phosphate powder having an average particle diameter of 20 .mu.m or smaller and a tap density of 35% or higher, and a polysaccharide. The polysaccharide is preferably a dextran sulfate (e.g., dextran sulfate sodium) having an average particle diameter of 0.1 to 100 .mu.m. The calcium phosphate cement composition comprises the above specific calcium phosphate powder and a liquid for cement mixing comprising an aqueous solution containing 30 to 60 wt % dextran sulfate (e.g., dextran sulfate sodium or dextran sulfate potassium). The calcium phosphate powder preferably comprises a tetracalcium phosphate powder and an equimolar amount of a calcium hydrogen phosphate powder as main components.
A calcium phosphate cement comprising a calcium phosphate powder having an average particle diameter of 20 .mu.m or smaller and a tap density of 35% or higher, and dextran sulfate.
A calcium phosphate cement composition comprising a calcium phosphate powder having an average particle diameter of 20 .mu.m or smaller and a tap density of 35% or higher, a dextran sulfate, and water.
A calcium phosphate cement composition comprising a calcium phosphate powder having an average particle diameter of 20 .mu.m or smaller and a tap density of 35% or higher, and an aqueous solution containing water for cement mixing and dextran sulfate.
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