Processes for production of azo macroinitiators for the synthesis of block copolymers and of aqueous block copolymer dispersions and emulsions and the use thereof

摘要

The invention concerns a process for the production of block copolymers or aqueous dispersions and emulsions thereof, whereby azo macroinitiators are reacted with radical-polymerizable monomers or a mixture of several radical-polymerizable monomers. The azo macroinitiators are obtained by reacting simple reactive azo compounds with prepolymers with a molecular weight between 400 and 20000, which possess at least 2 functional groups, e.g. polyurethanes or polyesters. PPThe aqueous block copolymer dispersions and emulsions produced according to the invention are suitable for use for the production of paints, adhesives etc.