Patent ID: 7892644

Claim:
A microcapsular powder comprising: microcapsules as primary particles which comprise: a capsule core of a latent heat storage material and a capsule wall comprising: from 10% to 100% by weight of one or more C 1 -C 24 -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), and from 0% to 90% by weight of other monomers (monomer III) wherein weight percent is based on the total weight of the monomers, and wherein the microcapsule primary particles are aggregated to form aggregates of microcapsules having an average particle size in the range of 150-400 μm, and 80% by weight of the aggregates of microcapsules have a diameter greater than or equal to 90 μm.