초록 ▼

An improved process for producing double-capsules by dispersing in a hydrophobic substance a dispersion of microcapsules containing as the core material a hydrophilic substance or a hydrophobic substance, the latter of which is the same as or different from the first named hydrophobic substance, whe

An improved process for producing double-capsules by dispersing in a hydrophobic substance a dispersion of microcapsules containing as the core material a hydrophilic substance or a hydrophobic substance, the latter of which is the same as or different from the first named hydrophobic substance, wherein the improvement is characterized in that the first named hydrophobic substance has a viscosity of 40 to 150,000 cps at 25°C.

대표청구항 ▼

An improved process for producing double-capsules which comprises the following steps: (a) preparing a dispersion of primary microcapsules containing as a core material a hydrophilic substance or a hydrophobic substance; (b) mixing said dispersion of primary microcapsules with a second hydrophobic s

An improved process for producing double-capsules which comprises the following steps: (a) preparing a dispersion of primary microcapsules containing as a core material a hydrophilic substance or a hydrophobic substance; (b) mixing said dispersion of primary microcapsules with a second hydrophobic substance which may be the same as or different from the first names hydrophobic substance to disperse said primary microcapsules in the second hydrophobic substance which displaces a medium of the dispersion of primary microcapsules, the viscosity of the second hydrophobic substance being from 40 to 150,000 cps at 25°C.; (c) enclosing the primary microcapsules dispersed in the second hydrophobic substance with a wall membrane formed by in-situ polymerization using wall membrane-forming monomers all of which are included in a medium dispersing or emulsifying said second hydrophobic substance to form double capsules.