| 摘要 |
PURPOSE:To make mixing uniform and to prevent the generation of photographic fogs in visible images by using resins formed of a mixture of emulsions obtd. by emulsion polymn. and emulsions obrd. by emulsion polymn. of polymers differing from these as a binder. CONSTITUTION:Plural kinds of polymer emulsions of mutually different properties are prepd. by an emulsion polymn. method, and plural kinds of these polymer emulsions are mixed. The mixed emulsions are subjected to a coagulation treatment to separate the resins. After the resins are dehydrated and solidified, they are mixed with a coloring agent, etc. Thence, the mixture is subjected to soln. kneading, grinding, and classifying treatment, whereby a toner for electrostatic charge development is obtained. A styrene-butadiene copolymer can be enumerated as one of desirable examples of the mixed resins, and components of mutually different degrees of polymn. or of different kinds are enumerated as the components for the mixed resins. The resultant toner has improved developing efficiency, fixability, durability, etc. |
