Abstract: Dental material which contains (a) at least one mono- or multifunctional radically polymerizable monomer, (b) at least one organic halogen compound as initiator for the radical polymerization, (c) at least one transition metal compound as catalyst and (d) at least one reducing agent. The material is characterized by a high storage stability at room temperature and does not have the disadvantages associated with peroxides.

Abstract: Polymerizable compositions are described which contain, as photoinitiator, at least one acyltin compound according to the general formula (I):

Abstract: Vinylcyclopropane of general formulae I in which X, Y in each case are O or NH, wherein X and Y cannot have the same meaning, R1 is a linear or branched C1-C8-alkyl radical, which can be interrupted by O, S, an ester group or a urethane group, R2 is a linear or branched C2-C10-alkylene radical, which can be interrupted by O, S, an ester group or a urethane group, R3 is a hydrocarbon radical with 1 to 20 carbon atoms, which additionally can contain one or more N, O or S atoms, and n is 1, 2, 3 or 4, preferably 1 or 2. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

Abstract: Radically polymerizable, difunctional phenylene sulfide according to Formula I in which X, Y independently of each other in each case are absent or are O or NR6, R1, R2 independently of each other in each case are H, a linear or branched C1 to C10 alkyl radical, —OR7, —SR8, Cl or Br, R3 is absent or is a C1-C10 alkylene radical which can be interrupted by O or S, R4 is absent or is a C1-C10 alkylene radical which can be interrupted by O or S, wherein R3 and R4 cannot be absent at the same time, R5 is H or a C1-C5 alkyl radical, R6, R7, R8 independently of each other in each case are H or a linear or branched C1 to C10 alkyl radical, a, b, c, d independently of each other in each case are 0 or 1 and e is 1 or 2.

Abstract: Acyl germanium compound according to general formula [RmAr—(C?O)—]4—Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Abstract: Radically polymerizable silane according to the general formula I in which R1 is a linear or branched aliphatic C1-C9-alkyl radical, phenyl or alkylated phenyl radical, R2, R3 independently of each other in each case are absent or are a linear or branched aliphatic C1-C20-alkylene radical, which can be interrupted by S or O atoms, R4, R5, R6 independently of each other in each case are —Cl, —O—CH3, —O—C2H5, —CH3 or —C2H5, X is CH2 or O, Y is absent, or is O or NR?, wherein R? is H or a C1-5-alkyl radical, and Z is absent, or is O, NR?, —CO—O—, —CO—NR?—, —O—CO—O—, —O—CO—NR?—, or —NR?—CO—NR?—, wherein R? is H or a C1-5-alkyl radical and wherein the radicals R2 and R3 cannot be absent at the same time and Z is absent if R2 or R3 is absent, polycondensates based thereon and fillers surface-modified therewith.

Abstract: Radically polymerizable dental material, which contains at least one sulphonic acid ester of Formula 1: in which A is H, CN, an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical or a combination thereof; X is COO— or —CON(R1)— or is absent; B is an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical, or a combination thereof; R1 is hydrogen or an aromatic, cycloaliphatic, linear or branched aliphatic C1-C10-hydrocarbon radical; m is an integer from 1 to 6, n is an integer from 1 to 6 and p is an integer from 1 to 6; wherein m and p cannot simultaneously be greater than 1. The compounds of Formula 1 are active as chain transfer agents in radical polymerization.

Abstract: Vinylcyclopropane of general formulae I in which X, Y in each case are O or NH, wherein X and Y cannot have the same meaning, R1 is a linear or branched C1-C8-alkyl radical, which can be interrupted by O, S, an ester group or a urethane group, R2 is a linear or branched C2-C10-alkylene radical, which can be interrupted by O, S, an ester group or a urethane group, R3 is a hydrocarbon radical with 1 to 20 carbon atoms, which additionally can contain one or more N, O or S atoms, and n is 1, 2, 3 or 4, preferably 1 or 2. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

Abstract: Acyl germanium compound according to general formula [RmAr—(C?O)—]4—Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Abstract: Acyl germanium compound according to general formula [RmAr—(C?O)—]4—Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.

Abstract: Dental material which contains at least one vinylcyclopropane of the general formulae I, in which A, B independently of each other are in each case OH or COOH; X, Y independently of each other are in each case O or NH; R1, R2 independently of each other are in each case H or an aliphatic linear or branched C1-C10 hydrocarbon radical which can be interrupted by O, S or an ester group; and n, m independently of each other are in each case 0, 1 or 2, wherein, if X?Y?O, R1?H and R2?H, n+m?1. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

Abstract: Radically polymerizable dental material, which contains at least one compound of Formula I: The material preferably additionally contains a radically polymerizable monomer, an initiator for the radical polymerization and filler. It is characterized by a low polymerization contraction stress.

Abstract: Polymerizable compositions are described which contain, as photoinitiator, at least one acyltin compound according to the general formula (I):

Abstract: The invention relates to dental materials which contain at least one compound of Formula I The materials are characterized by very good mechanical properties after curing.

Abstract: Vinylcyclopropane of general formulae I in which X, Y in each case are O or NH, wherein X and Y cannot have the same meaning, R1 is a linear or branched C1-C8-alkyl radical, which can be interrupted by O, S, an ester group or a urethane group, R2 is a linear or branched C2-C10-alkylene radical, which can be interrupted by O, S, an ester group or a urethane group, R3 is a hydrocarbon radical with 1 to 20 carbon atoms, which additionally can contain one or more N, O or S atoms, and n is 1, 2, 3 or 4, preferably 1 or 2. The vinylcyclopropanes are characterized by a low shrinkage and a high reactivity on radical polymerization and are suitable in particular for the preparation of dental materials.

Abstract: Radically polymerizable, difunctional phenylene sulfide according to Formula I in which X, Y independently of each other in each case are absent or are O or NR6, R1, R2 independently of each other in each case are H, a linear or branched C1 to C10 alkyl radical, —OR7, —SR8, Cl or Br, R3 is absent or is a C1-C10 alkylene radical which can be interrupted by O or S, R4 is absent or is a C1-C10 alkylene radical which can be interrupted by O or S, wherein R3 and R4 cannot be absent at the same time, R5 is H or a C1-C5 alkyl radical, R6, R7, R8 independently of each other in each case are H or a linear or branched C1 to C10 alkyl radical, a, b, c, d independently of each other in each case are 0 or 1 and e is 1 or 2.

Abstract: Radically polymerizable silane according to the general formula I in which R1 is a linear or branched aliphatic C1-C9-alkyl radical, phenyl or alkylated phenyl radical, R2, R3 independently of each other in each case are absent or are a linear or branched aliphatic C1-C20-alkylene radical, which can be interrupted by S or O atoms, R4, R5, R6 independently of each other in each case are —Cl, —O—CH3, —O—C2H5, —CH3 or —C2H5, X is CH2 or O, Y is absent, or is O or NR?, wherein R? is H or a C1-5-alkyl radical, and Z is absent, or is O, NR?, —CO—O—, —CO—NR?—, —O—CO—O—, —O—CO—NR?—, or —NR?—CO—NR?—, wherein R? is H or a C1-5-alkyl radical and wherein the radicals R2 and R3 cannot be absent at the same time and Z is absent if R2 or R3 is absent, polycondensates based thereon and fillers surface-modified therewith.

Abstract: Radically polymerizable dental material, which contains at least one sulphonic acid ester of Formula 1: in which A is H, CN, an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical or a combination thereof; X is COO— or —CON(R1)— or is absent; B is an aromatic, cycloaliphatic, linear or branched aliphatic C1-C30-hydrocarbon radical, or a combination thereof; R1 is hydrogen or an aromatic, cycloaliphatic, linear or branched aliphatic C1-C10-hydrocarbon radical; m is an integer from 1 to 6, n is an integer from 1 to 6 and p is an integer from 1 to 6; wherein m and p cannot simultaneously be greater than 1. The compounds of Formula 1 are active as chain transfer agents in radical polymerization.

Abstract: Dental material which contains (a) at least one mono- or multifunctional radically polymerizable monomer, (b) at least one organic halogen compound as initiator for the radical polymerization, (c) at least one transition metal compound as catalyst and (d) at least one reducing agent. The material is characterized by a high storage stability at room temperature and does not have the disadvantages associated with peroxides.

Abstract: Acyl germanium compound according to general formula [RmAr—(C?O)—]4—Ge and process for the preparation thereof. The compound is suitable as initiator for radical polymerization.