Glass composition for water setting ion-polymer cements
AssigneeInternational Standard Electric Corporation
InventorsAlan Maries, Francesca M. Shreeve
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Abstract
A glass composition for effecting crosslinking of a polycarboxylic acid cement and cement compositions formed therefrom. The glass is of the aluminoborate type and comprises 40 to 75 mole % boric oxide, not more than 60 mole % zinc oxide, not more than 50 mole % calcium oxide and not more than 20 mole % alumina. Cements formed from the glasses have a wide range of applications including structural cements, dental filler and orthopaedic cements.
Claims9
A cement composition comprising a polycarboxylic acid material and a partially or completely water soluble glass said polycarboxylic acid material derived from unsaturated mono- or di-carboxylic acid monomer materials, said glass comprising a glass composition for effecting crosslinking of a polycarboxylic acid cement, said composition including an aluminoborate type glass comprising 40 to 75 mole % boric acid, 3.5 to 10 mole % alumina, 12.5 to 60 mole % zinc oxide, and 10.0 to 50 mole % calcium oxide, the remainder if any comprising one or more further metal oxides, or phosphorus pentoxide or mixtures thereof.
Dependencies are inferred from the claim text.