| abstract |
Process for the preparation of hyperbranched polymers, characterized in that compounds of general formula I, where the variables are defined as follows: X sulfur or oxygen, R 1 , R 3 are different or the same and selected from hydrogen, C 1 -C 6 -alkyl, C 3 -C 12 -cycloalkyl, C 6 -C 14 -aryl, R 2 , R 4 are different or the same and are selected from hydrogen, C 1 -C 6 -alkyl, C 3 -C 12 -cycloalkyl, C 6 -C 14 -aryl, Z 1 , Z 2 different or the same and selected from COOH and COOR 6 , wherein the radicals R 6 are different or the same and are selected from C 1 -C 6 -alkyl, formyl, CO-C 1 -C 6 -alkyl, R 5 are each different or the same and selected from C 1 -C 6 -alkyl and hydrogen, n is an integer in the range of 2 to 10, optionally with at least one compound of general formula Ia, where the variables are as defined above, in the presence of a catalyst for the reaction. |