Dental cement composition
A dental cement composition comprising more than 50% by weight Portland cement, and characterized in that it further comprises a polymer selected from styrene, vinyl, and acrylic polymers carrying a sulfonate function.
1. A dental cement composition comprising more than 50% by weight Portland cement and a;
wherein the polymer is sodium polystyrene sulfonate presenting a molecular mass of about 70,000 grams per mole (g/mol).
2. A composition according to claim 1 , comprising 0.1% to 25% by weight of said polymer.
3. A composition according to claim 1 , including gypsum.
4. A composition according to claim 1 , including an opacifier.
5. A composition according to claim 1 , including a binder.
6. A composition according to claim 1 , wherein the various ingredients of the composition present a grain size of less than about 10 μm.
7. A composition according to claim 1 , presenting a setting time of the order of 10 min and a compression strength of about 90 MPa.
8. A composition according to claim 1 , comprising:
60% to 95% by weight Portland cement;
0.1% to 25% by weight sodium polystyrene sulfonate;
0.1% to 5% gypsum;
0.1% to 25% BaSO 4 ; and
0.1% to 25% calcium formate.
9. A composition according to claim 1 , comprising:
70% to 85% by weight Portland cement;
0.1% to 5% by weight sodium polystyrene sulfonate;
1% to 5% gypsum;
5% to 15% BaSO 4 ; and
0.1% to 15% calcium formate.
10. The composition according to claim 4 , wherein the opacifier is ZrO 2 or BaSO 4 .
11. The composition according to claim 5 , wherein the binder comprises at least one of formate, ascorbate, or gluconate.
12. The composition according to claim 5 , wherein the binder comprises calcium formate.
13. The composition according to claim 1 , wherein the various ingredients of the composition, except for the polymer, have a grain size of less than about 10 μm.