| 摘要 |
[Object] This invention provides a dispersion containing an insect pest repellent active substance, and an adhesive or bond, ink, resin pellets, a resin product, and a sheet or a film which can exhibit a long term repellent active effect by the particles carrying the dispersion. [Means for achieving the object] The invention also concerns with a natural essential oil having a sanitary pest repellent activity; a dispersion containing, as an active component, at least one of: a first fraction of copaiba oil given by silica gel column chromatography using hexane as an elution solvent, a second fraction given by silica gel column chromatography using a 4:4:1 mixture of hexane/chloroform/ethyl acetate as an elution solvent, and a third fraction given by fractionating the remnant of the second fraction using a 1:1 mixture of ethyl acetate/chloroform as an elution solvent; a dispersion thereof containing a sedimentation inhibitor, particles carrying these dispersions, and a sanitary insect pest repellent active adhesive or bond, ink, resin pellets, resin particles, resin product, sheet or film, and device containing the same.
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