PRODUCTION OF TONER OR CAPSULED TONER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE
PURPOSE: To stabilize the developing performance and fixability of a toner or capsuled toner by heating a mixture of a binder contg. a specified compound with a colorant and by stirring the mixture in the presence of solid media so as to form the toner or capsuled toner. CONSTITUTION: A mixture of 100pts.wt. binder contg. a compound having a long chain of aliphatic hydrocarbon and ≤30cps melt viscosity at 100°C with 1W200pts.wt. colorant is heated. In order to dissociate an aggregate of the colorant in the mixture, the mixture is stirred in the presence of solid media. Toner particles are formed from the resulting uniform mixture. Solid core particles may be formed from the uniform mixture and capsuled. The compound having a long chain of aliphatic hydrocarbon and 1W30cps melt viscosity at 100°C may be 12W50C hydrocarbon, fatty acid or fatty acid ester. The developing performance and fixability of the toner or capsuled toner are stabilized. COPYRIGHT: (C)1987,JPO&Japio