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US 5,332,429 AGranted
Method for treating fluoroaluminosilicate glass
AssigneeMinnesota Mining and Manufacturing Company
InventorsSumita B. Mitra, Scott R. Culler, Bing Wang
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Abstract
Fluoroaluminosilicate dental cement glasses are treated with an aqueous silanol treating solution and optionally with an additional organic compound. The treated glasses form cements with improved strength. The silanol can be ethylenically-unsaturated and can contain acidic groups, and, if so, is novel in its own right.
Claims37
A method for treating fluoroaluminosilicate glass, comprising the steps of:
- a. mixing finely-divided fluoroaluminosilicate glass with an aqueous silanol solution, and
- b. drying the glass, said glass being capable of forming a cement when mixed with water and a polyalkenoic acid.
A method of making a glass ionomer cement, comprising the steps of:
- a. treating finely-divided fluoroaluminosilicate glass with an aqueous silanol solution;
- b. mixing the treated glass with a polyalkenoic acid;
- and
- c. allowing the mixture of step b) to harden.
1 more element
Dependencies are inferred from the claim text.