Mixing component for dental glass ionomer cements
AssigneeESPE Fabrik Pharmazeutischer Praparate GmbH
InventorsWerner Schmitt, Robert Purrmann, Peter Jochum, Oswald Gasser
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Abstract
Dental glass ionomer cements are obtained by using as a mixing component for preparing the final cement mixture either a liquid mixing component comprising an aqueous solution of a certain maleic acid-acrylic acid-copolymer and optionally usual additives or a solid, powdery mixing component comprising a powder mixture of a glass ionomer cement powder and the maleic acid-acrylic acid-copolymer in solid form and optionally usual additives.
Claims10
A two component mixing preparation for glass ionomer cements selected from the group consisting of:
- (a) a glass ionomer cement powder and an aqueous solution containing from about 20 to 65% by weight of a maleic acid-acrylic acid copolymer which contains from 20 to 65 mole % acrylic acid units and from 80 to 35 mole % maleic acid units, and
- (b) a powder mixture of a glass ionomer cement powder and a maleic acid-acrylic acid copolymer in solid form which contains from 20 to 65 mole % acrylic acid units and from 80 to 35 mole % maleic acid units.
A method of preparing a glass ionomer cement comprising of mixing an aqueous solution containing from about 20 to 65 percent by weight of a maleic acid-acrylic acid copolymer which contains from 2 to 65 mole % acrylic acid units and from 80 to 35 mole % maleic acid units with a glass powder to form a paste, forming the paste into the desired shape and permitting it to set.
A method for preparing a glass ionomer cement comprising of mixing a powder mixture of a glass component and a maleic acid-acrylic acid copolymer which contains from 20 to 65 mole % acrylic acid units and from 80 to 35 mole % maleic acid units with water to form a paste, forming the paste into the desired shape and permitting it to set.
Dependencies are inferred from the claim text.