Process for producing microcapsules

Details Process for producing microcapsules Process for producing microcapsules

1990-04-10

1991-10-29

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

42840221, 503215, B01J 1318

Patent

active

050614100

ABSTRACT:
The process of the present invention uses an aminoaldehyde polycondensate as capsule-wall and a hydrophobic core material dispersed in an aqueous acidic solution containing an anionic water-soluble colloidal substance, wherein it is characterized in that the anionic water-soluble colloidal substance comprises a mixture of an anionic water-soluble substance having a high viscosity and that having a low viscosity.
The process of the present invention provides a slight viscosity rise in the encapsulation, a capsule slurry with a high concentration, low viscosity, and a slight smudging in the application as a pressure-sensitive recording sheet and the like, compared with the conventional processes.

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patent: 4746467 (1988-05-01), Sakamoto et al.
patent: 4753759 (1988-06-01), Fukuo et al.
patent: 4957666 (1990-09-01), Kawamura et al.

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