PSAs with high molecular weights and narrow molecular weight distribution and process for their preparation

摘要

The invention relates to a process for the preparation of pressure-sensitive adhesives which have high molecular weights combined with a narrow molar mass distribution, and correspondingly prepared PSAs, especially polyacrylate-based PSAs. Surprisingly, it has been found that polymers having high molecular weights and a narrow molecular weight distribution, in particular polyacrylates having high molecular weights and a narrow molecular weight distribution, can be prepared excellently, in particular by RAFT processes in the presence of a diradical initiator which thermally cyclizes to form a biradical and which Suitable for use as shear-resistant PSAs.