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US 5,539,017 AGranted
Use of a thermally curable composition as dental material
AssigneeIvoclar AG
InventorsVolker Rheinberger, Norbert Moszner
Life of this patent
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Abstract
The use of a thermally curable composition as dental material or constituent of a dental material is described, which composition contains one or more .beta.-dicarbonyl compounds and one or more .alpha.,.beta.-unsaturated carboxylic acid esters, the curing of the composition taking place in the presence of a catalyst base.
Claims17
A thermally curable composition suitable for use as or in a dental material comprising:
- (a) one or more .beta.-dicarbonyl compounds of formula I as a Michael donor ##STR5## Wherein R.sup.1 is a .beta.-dicarbonyl group of formula Ia ##STR6## R.sup.2 is hydrogen, alkyl or aryl;
- R.sup.3 is oxygen, NH or not present, Y and X are alkylene, phenylene or alkylphenylene radicals which can be interrupted by oxygen atoms, sulfur atoms or NH groups, Z is alkylene or phenylene, n is an integer in the range from 0 to 15;
- (b) one or more .beta.-unsaturated carboxylic acid esters of formula II as a Michael acceptor ##STR7## Wherein R.sup.4 is an acrylate group of formula IIa;
- ##STR8## Y and X are alkylene, phenylene or alkylphenylene radicals which can be interrupted by oxygen atoms, sulfur atoms or NH groups, Z is alkylene or phenylene,
- R.sup.5 is hydrogen, a cyano or alkyl group, m is an integer in the range from 0 to 15;
- (c) a catalyst base;
- and
- (d) a modifying agent having at least one radically polymerizable group, wherein said composition is capable of undergoing a first curing step mediated by said catalyst base and a second curing step involving said modifying agent.
5 more elements
A thermally curable composition suitable for use as or in a dental material comprising:
- (a) one or more .beta.-dicarbonyl compounds of formula I as a Michael donor ##STR9## Wherein R.sup.1 is a .beta.-dicarbonyl group of formula Ia;
- ##STR10## R.sup.2 is hydrogen, alkyl or aryl;
- R.sup.3 is oxygen, NH or not present, Y is alkylene, phenylene or alkylphenylene radicals which can be interrupted by oxygen atoms, sulfur atoms or NH groups, Z is alkylene or phenylene, n is an integer in the range from 0 to 15;
- (b) one or more .beta.-unsaturated carboxylic acid esters of formula II as a Michael acceptor ##STR11## Wherein R.sup.4 is an acrylate group of formula IIa ##STR12## Y and X are alkylene, phenylene or alkylphenylene radicals which can be interrupted by oxygen atoms, sulfur atoms or NH groups, Z is alkylene or phenylene, R.sup.5 is hydrogen, a cyano or alkyl group, m is an integer in the range from 0 to 15;
- (c) a catalyst base;
- and
- (d) a modifying agent having at least one radically polymerizable group, wherein said composition is capable of undergoing a first curing step mediated by said catalyst base and a second curing step involving said modifying agent.
4 more elements
Dependencies are inferred from the claim text.