Polyether based preparations and the use thereof

DETAILED DESCRIPTION 1.
A preparation comprising: (A) 30 to 56 wt.
-% aziridino polyethers with a cyclic polyether content lower than 5.
0 wt.
-%; (B) 30 to 45 wt.
-% compounds which effect a softening of the cured dental materials; (C) 10 to 15 wt.
-% fillers; (D) 4 to 10 wt.
-% further active ingredients; with the provisos that the weight ratio between constituents (A) and (C) to the compounds of constituent (B) is 1.
2 to 2.
1; constituent (B) comprises (B1) compounds with molar masses lower than 500 g/mol, (B2) trisacyl esters of glycerol of non-animal origin with molar masses between 500 to 2000 g/mol and (B3) compounds with molar masses greater than 2000 g/mol; and the weight ratio between (B1) and (B3) is 1:0.
8 to 1:2.
3.
2.
The preparation according to claim 1, in which bis-aziridino polyethers with aziridino equivalent masses of 2000 to 4000 g/equivalent are used as constituent (A), the polyether part consists of oxytetramethylene and oxydimethylene units in the ratio 4:1 to 3:1 and the proportion of oligomeric cyclic ethers in the bis-aziridino polyethers is lower than 0.
5 wt.
-%.
3.
The preparation according to claim 1, in which constituent (B1) comprises at least one ester plasticizer or at least one aromatic plasticizer or a mixture of at least one ester plasticizer and at least one aromatic plasticizer.
4.
The preparation according to claim 1, in which the trisacyl esters of glycerol of constituent (B2) are synthetic fats with a steaoryl content of more than 65 wt.
-% of the triglyceride.
5.
The preparation according to claim 1, in which the constituent (B3) is at least one liquid polymer selected from the group consisting of a polyether polymer, a polyester polymer, a polyurethane polymer, a polycarbonate polymer and a polyolefin polymer.
6.
The preparation according to claim 5, in which the component (B3) is at least one liquid polyether polymer having the same or a similar preparation and molar mass as the aziridino polyethers used as constituent (A), but bearing hydroxyl or acetyl end groups