| abstract |
The present invention concerns microcapsules comprising a capsule core, a capsule wall and also, disposed on the outer surface of the capsule wall, a polyelectrolyte having an average molecular weight in the range from 500 g/mol to 10 million g/mol, the capsule wall being constructed from n 10% to 100% by weight of one or more C 1 -C 24 -alkyl esters of acrylic and/or methacrylic acid (monomers I), n 0% to 80% by weight of a water-insoluble or sparingly soluble in water bi- or polyfunctional monomer (monomers II), and n 0% to 90% by weight of other monomers (monomer III) n all based on the total weight of the monomers, wherein the microcapsules have an average particle size of 1.5-2.5 μm and 90% of the particles have a particle size ≦4 μm, a process for their production, their use in textiles, bindered building materials and heat transfer fluids, and also microcapsules as an intermediate product. |