Ivoclar Vivadent Ag

Technische Universitāt Wien

Technicshe Universität Wien

Konstanze Seidler

Norbert Moszner

Robert Liska

Christian Gorsche

Peter Burtscher

Iris Lamparth

Urs Karl Fischer

Kai Rist

Urs-Karl Fischer

Paul Gauss

The invention relates to the use of sulfonic acid esters of the following Formula 1 and/or Formula 2, individually or as a mixture of more than one thereof, as regulators in polymerization reactions of radically polymerizable, ethylenically unsaturated monomers: whereinA in each case independently is selected from H, CN, linear, branched or cyclic aliphatic or aromatic C-Chydrocarbon residues;X in each case independently is &#x2014;COO&#x2014; or &#x2014;CON(R)&#x2014;, wherein the binding to A occurs via O or N, or is absent if A is an aromatic hydrocarbon residue or CN;B in each case independently is selected from linear, branched or cyclic aliphatic or aromatic C-Chydrocarbon residues;Rin each case independently is selected from hydrogen and linear, branched or cyclic aliphatic or aromatic C-Chydrocarbon residues, which are optionally substituted with one or more OH groups, wherein the aliphatic hydrocarbon residues are optionally interrupted by one or more oxygen atoms; andn in each case independently is an integer from 1 to 6.

Sulfonic acid esters as regulators in radical polymerization reactions

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 C-C-hydrocarbon radical or a combination thereof; X is COO&#x2014; or &#x2014;CON(R)&#x2014; or is absent; B is an aromatic, cycloaliphatic, linear or branched aliphatic C-C-hydrocarbon radical, or a combination thereof; Ris hydrogen or an aromatic, cycloaliphatic, linear or branched aliphatic C-C-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.

Materials which can be cured by chain transfer polymerization

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.

Compositions with controlled network structure

Growing community of inventors

Oberrohrbach, Austria

Konstanze Seidler