| 摘要 |
Process for the manufacture of polymers having repeating units comprising spiro orthoester groups of general formula (I), wherein A is C1-6-alkylene, C1-6-alkyleneoxycarbonyl or an oxygen-carbon bond, R1 is hydrogen or methyl, R2 is C1-6-alkyl or C1-6-alkyl substituted by C1-6-alkoxy or aryloxy, R3 and R4 independently are hydrogen or C1-6-alkyl, R5 is hydrogen or methyl, R6 is hydrogen, methyl, phenyl, carboxy, carboxy-C1-6-alkyl, carboxamido or cyano, n is an integer > 1 and m is 0 or an integer >= 1, with the proviso that the molecular weight of the polymer is between 500 and 1 000 000, the polymers obtained and their use specifically in dental filling materials. |
