Patent ID: 7265895
Filing Date: 2007-09-04
Classification: B01J,G02F,Y10S

Abstract:
1. A process for manufacturing a microcapsule for an electrophoretic display device, which comprises the following steps of: dispersing a core substance into an aqueous medium containing a water-soluble surfactant wherein the core substance is a liquid containing a hydrophobic solvent and an electrophoretic fine particle; and thereafter adding a water-soluble compound to the aqueous medium; thereby forming a shell on a surface of the core substance; wherein: a compound (A) represented by the following general formula (1): wherein R 1 represents an aliphatic or aromatic hydrophobic group of a carbon number of 5 to 25, R 2 represents a polymer group having a polyamine structure or a polycarboxylic acid structure of a weight average molecular weight of 300 to 100,000, n represents an integer of 3 to 85, and X represents a group which is derived from a group capable of reacting with at least one kind of group selected from the group consisting of an amino group, an imino group and a carboxyl group, and is formed after the reaction, but it doesn't matter whether X is present or not, is used as the water-soluble surfactant, and a compound (B) having an epoxy group or an episulfide group is used as the water-soluble compound; and the shell is formed by reacting the compound (A) and the compound (B).