Invention Grant
US07902269B2 Dental material based on alkoxysilyl-functional polyethers containing a salt of a strong base as catalyst 失效
基于含有强碱盐作为催化剂的烷氧基甲硅烷基功能性聚醚的牙科材料

Dental material based on alkoxysilyl-functional polyethers containing a salt of a strong base as catalyst
Abstract:
The invention relates to condensation cross-linked dental materials based on alkoxysilyl-functional polyethers and at least one catalyst, the catalyst consisting of a salt and at least one anion of a saturated and/or unsaturated (cyclo)aliphatic carboxylic acid. The salt is formed from at least one cation selected from the group consisting of: complexes of alkali metal cations or ammonium cations and crown ethers and/or cryptands; tetraalkyl-, tetraaryl-, trialkylaryl-, dialkyldiaryl-, and monoalkyltriaryl-ammonium cations, tetraalkyl-, tetraaryl-, trialkylaryl-, dialykyldiaryl-, and monoalkyltriaryl-phosphonium cations, tetraalkyl-, and monoalkyltriaryl-stibonium cations; cations formed by the protonation of a base with a pKBH+ value of at least 20, measured in acetonitrile; and combinations of the complexes and cations. The carboxylic acid is a branched carboxylic acid, whose alkyl chain that is provided on the carboxyl group has a length of at least 2 carbon atoms or an unbranched carboxylic acid, whose alkyl chain that is provided on the carboxyl group has a length of at least 4 carbon atoms.
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