Method for producing metal nanoparticles and nanoparticles obtained in this way and use thereof

A process for producing metal nanoparticles,

• wherein through a reduction process, metal ions are reduced by means of at least one reducing agent in the presence of at least one polymeric stabilizer and converted to metal nanoparticles;
• wherein the reduction process is performed in a liquid medium as a single phase reaction and wherein the regulation of temperature and/or volume flows achieves a separation in time and/or space of the nucleation and growth processes of the resulting metal nanoparticles, wherein the process for producing metal nanoparticles is performed with a reaction time in the range from 0.0001 to 10 minutes;
• and within a temperature range of 10 to 40° C.;
• wherein the polymeric stabilizer has a weight-average molecular weight of at least 1,000 g/mol and is based on an acid- and/or base-functionalized polymer having polar functional groups and is selected from the group consisting of functionalized polyamines, functionalized polyurethanes, functionalized poly(meth)acrylates, functionalized polyether/polyester copolymers, functionalized polyethers, functionalized polyesters, functionalized fatty acid copolymers, functionalized block copolymers and functionalized polyalkoxylates and mixtures or combinations of at least two of these compounds;
• and
• wherein the polymeric stabilizer is used in amounts of 20 to 100% by weight, based on the resulting metal nanoparticles.