PREPARATION OF PARTICLE

Title:

PREPARATION OF PARTICLE

Document Type and Number:

Japanese Patent JP2001233903

Kind Code:

A

Abstract:

To provide a method to prepare particles with an extremely uniform particle size distribution required for particles like toner particles.

The preparation method of a particle comprises a step to prepare a polymerization system by dissolving in a polymerization solvent a polymerizable monomer which is soluble in the polymerization solvent and whose resultant polymer is insoluble in the polymerization solvent and a polymer composition soluble in the polymerization solvent; and a step to polymerize the polymerizable monomer in the polymerization system in the presence of a polymerization initiator at a polymerization temperature of 50-100°C to precipitate a particle to obtain a polymer particle, wherein the polymerization system is transparent when heating starts and becomes whitish due to the precipitation of the particle while the system is heated to the polymerization temperature and the difference between the temperature at which the polymerization system becomes whitish, T1, and the polymerization temperature, T2, satisfies the following relationship: 5≤(T2-T1)≤20.

Inventors:

BABA YOSHINOBU
ITABASHI HITOSHI
AYAKI YASUKAZU

Application Number:

JP2000048464A

Publication Date:

August 28, 2001

Filing Date:

February 25, 2000

Export Citation:

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Assignee:

CANON KK

International Classes:

G03G9/087; C08F2/04; C08F2/44; (IPC1-7): C08F2/04; C08F2/44; G03G9/087

Attorney, Agent or Firm:

Keisuke Watanabe (1 person outside)

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