Command-curable composition
AssigneeNational Research Development Corporation
InventorsJohn Ellis, Alan D. Wilson
Life of this patent
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Abstract
A phosphonate ester (vinyl phosphonic acid reacted with equimolar diol) will cure on command (e.g. exposure to light) in the presence of an initiator. By adding inert filler, poly(vinyl phosphonic acid), ion-leachable glass powder and water, a command-curable dental cement with glass ionomer characteristics is obtained.
Claims13
A command-curable composition, comprising an unsaturated phosphonate ester, being equivalent to the reaction product between an unsaturated phosphonic acid and a polyhydric alcohol in the mole ratio of (0.2-2.0) phosphonic acid groups:
- 1 hydroxyl groups, an initiator, and a cross-linkable polymeric acid capable of being gelled by cations with a valency of at least 2, said acid containing on average one phosphonic acid group per one to three backbone carbon atoms.
A command-curable composition comprising a partly esterified phosphonic acid having 0.2-5.0 phosphonic acid groups per unsaturated functional esterifying group, an initiator, and a cross-linkable polymeric acid capable of being gelled by cations with a valency of at least 2, said acid containing on average one phosphonic acid group per one to three backbone carbon atoms.
Dependencies are inferred from the claim text.