US Patent 7892644 Microscapsule powder

The present invention relates to a microcapsular powder having a latent heat storage material as a capsule core and a capsule wall constructed offrom 10% to 100% by weight of one or more C1-C24-alkyl esters of acrylic and/or methacrylic acid (monomers I),from 0% to 80% by weight of a water-insoluble or substantially water-insoluble bi- or polyfunctional monomer (monomers II), andfrom 0% to 90% by weight of other monomers (monomer III)all based on the total weight of the monomers,having an average particle size in the range of 150-400 μm and having 80% by weight of particles ≧90 μm in diameter, to a process for its production and to its use in bindered building materials, textiles and dumped beds.