Polymers having spiro orthoester groups, process of...

Details Polymers having spiro orthoester groups, process of... Polymers having spiro orthoester groups, process of...

C - Chemistry, Metallurgy

08

F

C08F 20/28 (2006.01) A61K 6/08 (2006.01) C08F 8/08 (2006.01) C08F 8/48 (2006.01) C09J 133/14 (2006.01)

Patent

CA 2138761

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.

Procédé de production de polymères ayant des unités répétitives renfermant des groupes spiro-orthoester de la formule générale (I), dans laquelle A est C1-6-alkylène, C1-6-alkylènoxycarbonyle ou une liaison oxygène-carbone, R1 est hydrogène ou un méthyle, R2 est un un alkyle C1-6 ou un alkyle C1-6 à substitution d'un alcoxy ou d'un aryloxy C1-6, R3 et R4 sont indépendamment de l'hydrogène ou un alkyle C1-6, R5 est hydrogène ou méthyle, R6 est hydrogène, méthyle, phényl, carboxy, carboxy-C1-6-alkyle, carboxamido ou cyano, n est un entier supérieur à 1, et m est égal à zéro ou est un entier égal ou supérieur à 1, sous réserve que le poids moléculaire du polymère se situe entre 500 et 1 000 000. L'invention porte également sur les polymères ainsi obtenus et leur utilisation spécifique comme matériau de charge dentaire.

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