Microencapsulated particles and process for production thereof

Details Microencapsulated particles and process for production thereof Microencapsulated particles and process for production thereof

Filed on

1987-10-20

Date issued

1989-05-09

Examiner

Welsh, J. David

Patent Class

Radiation imagery chemistry: process, composition, or product th

SubClass

Electric or magnetic imagery, e.g., xerography,...

SubSubClass

Post imaging process, finishing, or perfecting composition...

Other Related Categories

430137, 430138, 42840224, 42840221, G03G 908

Type

Patent

Status

active

Patent number

048289558

Description

ABSTRACT:
Microencapsulated particles each consisting of a mother particle of a core substance and a coating layer of daughter particles formed on the surface of said mother particle, which are obtained by stirring mother particles of a core substance having a number average particle diameter of 1 to 200 .mu.m and either or both of daughter particles (1) of a coating layer-forming material having a number average particle diameter of 1/5 of less of that of the mother particles and fragile daughter particles (2) of a coating layer-forming material having a number average particle diameter of more than 1/5 of that of the mother particles but having a fragility index (Fr) as defined in the specification of 5 or more, at a high speed in an air stream. Said microencapsulated particles can be used in various application fields such as coatings, electronic components and electronograph. In the electronograph filed, in particular, the microencapsulated particles can effectively be used as a toner capable of providing an image of high resolution and good quality.

REFERENCES:
patent: 4016099 (1977-04-01), Wellman

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