| 摘要 |
The invention relates to a process for the preparation of a polymeric mixture, comprising a first polymerization step in which substantially monomer M is reacted by atom transfer radical polymerization in a mixture which contains a transition metal salt, a ligand having at least two chelating sites, an atom transfer radical polymerization initiator, a reducing agent and monomer M, and a second polymerization step in which monomer S substituted by silyl groups is added to the mixture obtained from the first polymerization step, so that monomer S substituted by silyl groups is reacted by atom transfer radical polymerization in the mixture obtained from the first polymerization step. The polymeric mixture obtained is used as a binder additive for sealants.
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