Patent ID: 6136907
Filing Date: 2000-10-24
Classification: C08J,C08K

Abstract:
A process for producing a material composed of a functional compound finely dispersed into a binder resin, wherein the compound is in the form of particles having an average particle diameter of not more than 3 microns, and a portion of the functional compound is initially in the form of an agglomeration of said particles which are broken apart before dispersion, the process comprising the following steps:adding de-ionized water to said functional compound particles to form a hydrous paste of the compound containing a portion of agglomerated particles, wherein the compound is initially in a dry state and the compound contains impurity ions;removing said impurity ions to produce impurity ion free hydrous paste containing unagglomerated particles, by contacting said hydrous paste with an ion exchange substance having an ion exchange function selected depending upon the properties of the impurity ions, said ion exchange substance being in a mixed solvent composed of de-ionized water and an organic solvent miscible with water; anddispersing the impurity ion free, hydrous paste in a binder resin.