Dental impression material containing rheological modifiers and process of production
Assignee3M Innovative Properties Company
InventorsSebastian Zeller, Thomas Klettke, Peter Bissinger
Life of this patent
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Abstract
The invention relates to a dental impression material containing a theological modifier. The rheological modifier is in particular useful for adjusting shear-thinning properties of non-water based dental impression materials, especially of precision impression materials. It further relates to a method for producing a dental impression material.
Claims15
A polymerizable dental impression material containing at least one amide wax and/or at least one modified amide wax wherein the amide wax and/or the modified amide wax is a compound or a mixture of compounds having wax properties and the compound or at least one compound of the mixture has at least one amide group and wherein the amide wax and/or the modified amide wax has a melting temperature or an area of melting temperatures of above about 60° C.
A polymerizable dental impression material containing
- (a) a polyether compound containing N-alkylaziridine-groups,
- (b) a catalyst compound,
- (c) a filler,
- (d) optionally additives selected from the group consisting of dyes, pigments, flavourings, stabilizers, retarders, accelerators, auxiliary compounds, and combinations thereof, and
- (e) at least one amide wax and/or at least one modified amide wax wherein the amide wax and/or the modified amide wax is a compound or a mixture of compounds having wax properties and the compound or at least one compound of the mixture has an amide group and wherein the amide wax and/or the modified amide wax has a melting temperature or an area of melting temperatures of above 60° C.
The polymerizable dental impression material according to claim 9, wherein the amide wax and/or the modified amide wax does not contain any polymerizable N-alkylaziridine-groups.
A process of producing a polymerizable dental impression material, comprising the steps of:
- a) heating one ore more of the liquid ingredients of a dental impression material to a temperature of about 40 to about 140° C.,
- b) adding at least one amide wax and/or at least one modified amide wax to the heated liquid mixture wherein the amide wax and/or the modified amide wax has a melting temperature or an area of melting temperatures above the temperature to which the ingredients of step (a) are heated,
- c) incorporating the amide wax(es) and/or the modified amide wax(es) to the mixture by dissolving it with a dissolver at a temperature which is below the melting temperature or below the area of melting temperatures of the added amide wax(es) and/or the modified amide wax(es) until the mixture becomes clear,
- d) cooling the mixture down at room temperature.
Dependencies are inferred from the claim text.