| 摘要 |
Dental compositions based on an bifunctional or polyfunctional acrylic-acid and/or methacrylic-acid esters, which contain an initiator system for radical polymerization and which additionally contain a compound of the general formula in which: Ar represents aryl or substituted aryl, R1, R2 and R3 represent hydrogen, aryl or substituted aryl, straight-chain or branched chain C1-18-alkyl, C1-18-alkoxyl or C1-17-alkoxycarbonyl, in which alkyl and alkoxyl can be substituted by halogen or aryl, in which, R1 or R2, when represented by aryl or substituted aryl, C1-18-alkyl or C1-18-alkoxyl, can be linked with Ar by a single-bond and in which, Ar, when represented by phenyl, C1-18-alkylphenyl, C1-18-alkoxylphenyl, carboxyl-C1-17-alkylphenyl or halogenphenyl, R2 can be represented by -O-, which is linked with the phenyl or phenyl moiety of Ar to a benzofuran, and in which at least one of R1 to R3 represents H, and at least one of R1 to R3 represents aryl or aryl substituted by a straight-chain or branched-chain C1-18-alkyl, C1-18-alkoxyl, carboxyl-C1-17-alkyl or halogen. As a result of the content of a compound (I) the setting phase of the dental compositions is lengthened.
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