Heat storage microcapsules and manufacturing method thereof

摘要

Disclosed are heat storage microcapsules encapsulating a water-soluble heat storage material stably and certainly, heat storage microcapsules with high durability which prevent phase separation of an inorganic salt hydrate latent heat storage material, heat storage microcapsules which prevent supercooling of a latent heat storage material to exhibit stable heat history and a manufacturing method thereof. The heat storage microcapsules comprise a core covered with a shell, wherein the core contains (a) at least one water-soluble latent heat storage material selected from a salt hydrate and a sugar alcohol and (b) a polymer derived from a water-soluble monomer mixture of a water-soluble monofunctional monomer and a water-soluble multifunctional monomer, and the shell is composed of a hydrophobic resin.

主权项

1. Heat storage microcapsules comprising
a core covered with a shell, wherein the core contains (a) at least one water-soluble latent heat storage material selected from a salt hydrate and a sugar alcohol and (b) a polymer derived from a water-soluble monomer mixture of a water-soluble monofunctional monomer and a water-soluble multifunctional monomer, the polymer forms a three dimensionally crosslinked polymer matrix obtained from polymerization of the water-soluble monomer mixture of the water-soluble monofunctional monomer and the water-soluble multifunctional monomer in the presence of the water-soluble latent heat storage material, the water-soluble latent heat storage material is contained in the three dimensionally crosslinked polymer matrix, and the shell is composed of a hydrophobic resin, wherein the water-soluble monofunctional monomer is at least one selected from the group consisting of (meth)acrylamides, alkylene glycol mono(meth)acrylates, (meth)acrylic acid or its salts and N-vinyl pyrrolidone, and the water-soluble multifunctional monomer is at least one selected from the group consisting of bis(meth)acrylamides, alkylene glycol di(meth)acrylates, pentaerythritol diallyl ether, pentaerythritol triallyl ether, pentaerythritol tetraallyl ether, trimethylol propane triallyl ether, trimethylol propane diallyl ether and ethylene glycol diallyl ether.