| 摘要 |
The invention relates to a mixture of elongated N-alkylaziridine prepolymers of general formula (I) wherein n represents a whole number between 1 and 50; R1 represents H or C1 to C12 alkyl; X represents a bivalent, saturated or unsaturated, linear, branched, cyclic or polycyclic hydrocarbon radical which can contain between 0 and 5 heteroatoms from the group 0, NR1, S, which contains a total of between 1 and 50, preferably between 2 and 30, and ideally between 2 and 20 C atoms, and which comprises a group selected from -NR1-(C=0)-0-, -NR1-(C=0)-NR1-, -(C=O)-O-, -(C=O)- S-, which represents the covalent link with the polymer radical Z; Z represents a bivalent prepolymer radical having number-average molar masses of between 1,500 and 45,000 g/mole, from the group comprising polyester, polycarbonate, polyolefins, polysiloxane and polyethers; E represents -X'-A-X'-; A represents a double radical, saturated or unsaturated, linear, branched, cyclic or polycyclic hydrocarbon radical which optionally contains aromatic compounds, can contain between 0 and 15 heteroatoms from group 0, NR1, S, and comprises a total of between 0 and 50, preferably between 1 and 30, and ideally between 1 and 20 C atoms; and X' represents a double radical, saturated or unsaturated, linear, branched, cyclic or polycyclic radical which optionally contains aromatic compounds, can contain between 0 and 15 heteroatoms from the group 0, NR1, S, and comprises a group selected from -NR1-(C=O)-O-, -NR1-(C=O)-NR1-, -(C=O)-O-, -(C=O)-S, which represents the covalent link with the polymer radical Z; with non-elongated N-alkylaziridine prepolymers of general formula (II) wherein R1, X and Z have the above-mentioned designations. The invention also relates to the production and the use of said mixture in hardenable compositions, especially in dental materials.
|
