Patent ID: 7488513
Filing Date: 2009-02-10
Classification: G02F

Abstract:
1. A method of producing microcapsules having an electrophoretic particle dispersion encapsulated comprising: emulsifying and dispersing in a hydrophilic medium a hydrophobic dispersion having electrophoretic particles dispersed in a hydrophobic medium by using a first stirring apparatus transferring said hydrophobic dispersion emulsified and dispersed in the hydrophilic medium to a second stirring apparatus; and forming microcapsules of the said hydrophobic dispersion emulsified and dispersed in the hydrophilic medium under stirring with a stirring blade of said second stirring apparatus, wherein in said first stirring apparatus, a circumferential speed at the end of a stirring part is 2 m/s to 90 m/s, and a distance (a) between the end of the stirring part and that immobile part of the stirring apparatus which is nearest to the end of the stirring part is 0 mm<(a)<20 mm, in said second stirring apparatus a circumferential speed of the stirring blade is 0.2 m/s to 5.0 m/s, and the second stirring apparatus is accommodated in a reaction container so as to enable stirring of the stirring blade used in forming microcapsules of the emulsified and dispersed hydrophobic dispersion, a ratio (d a ratio (d