Microcapsule and method for producing the same
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsHiroaki Saito, Toshihiko Kawakubo
Life of this patent
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Abstract
A microcapsule includes a core/shell structure, in which the shell includes a water-soluble polymer and the core includes an organic peroxide. The water-soluble polymer is preferably at least one water-soluble polymer selected from the group consisting of polyvinyl alcohol, gelatin, poly(meth)acrylic acid derivatives, polyvinyl pyrrolidone, and polyethylene oxide. The polyvinyl alcohol is preferably partially saponified polyvinyl alcohol having a degree of saponification of 80% by mole or more and 99.5% by mole or less and an average degree of polymerization of 1,500 or more and 3,500 or less.
Claims7
A microcapsule comprising:
- a core/shell structure, wherein
- the shell includes a water-soluble polymer and the core includes an organic peroxide, and
- the water-soluble polymer is at least one water-soluble polymer selected from the group consisting of polyvinyl alcohol, poly(meth)acrylic acid derivatives, polyvinyl pyrrolidone, and polyethylene oxide,
- and the organic peroxide has a 10-hour half-life temperature in benzene at a concentration of 0.1 mol/L of 70° C. or less.
A method for producing a microcapsule comprising:
- a mixing step of mixing a water-soluble polymer and an organic peroxide to give a microcapsule,
- wherein the microcapsule has a core/shell structure, and
- the shell includes the water-soluble polymer and the core includes the organic peroxide, the water-soluble polymer is at least one water-soluble polymer selected from the group consisting of polyvinyl alcohol, poly(meth)acrylic acid derivatives, polyvinyl pyrrolidone, and polyethylene oxide,
- and the organic peroxide has a 10-hour half-life temperature in benzene at a concentration of 0.1 mol/L of 70° C. or less.
Dependencies are inferred from the claim text.