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US 2008/0157415 A1Published application
Composition and Method for Fabricating Microcapsules Encapsulating Phase-Change Material
AssigneeTaiwan Textile Research Institute
InventorsYen-Hsi Lin, Chi-Shu Wei
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Abstract
A composition and a method for fabricating microcapsules encapsulating phase-change material by interfacial condensation polymerization are provided. In this composition and method, a surfactant and an organic solvent are not needed.
Claims26
A composition for fabricating microcapsules encapsulating phase-change material, comprising:
- water;
- a waterborne polyurethane dispersed in the water and having a weight percentage of about 3%-9.5% in the composition;
- a polar phase-change material;
- a lipophilic monomer dissolved in the phase-change material, wherein the lipophilic monomer has at least three free isocyanate functional groups and has a weight percentage of about 1%-4% in the composition;
- and
- a paraffin in the phase-change material.
3 more elements
A method of fabricating microcapsules encapsulating phase-change material, comprising:
- dispersing a waterborne polyurethane in water to form an aqueous solution;
- dissolving a lipophilic monomer and a paraffin in a polar phase-change material to form an organic solution, wherein the lipophilic monomer has at least three free isocyanate functional groups;
- mixing the aqueous solution and the organic solution in a reactor to form an emulsion;
- and
- heating the emulsion to form hydrophilic shells of microcapsules by interfacial condensation polymerization of the waterborne polyurethane and the lipophilic monomer.
2 more elements
Dependencies are inferred from the claim text.