Process for the continuous production of microcapsules

Details Process for the continuous production of microcapsules Process for the continuous production of microcapsules

1987-04-24

1988-08-02

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

42721334, 42840221, 42840224, 428914, 503215, B01J 1302

Patent

active

047612550

ABSTRACT:
A continuous process for the production of microcapsules having polymeric walls and a solid or liquid core which comprises mixing a polyisocyanate with the material to be encapsulated, reacting the resulting mixture, a polyamine, and an aqueous phase containing a dispersion aid, the reaction being initiated in a high-turbulence mixing zone to form an emulsion, and subsequently transferring the reaction product to a multiple-stage cascade of vessels, the temperature being increased from stage to stage and being kept constant during each stage.

REFERENCES:
patent: 3432327 (1969-03-01), Kan et al.
patent: 3577515 (1971-05-01), Vandegaer
patent: 3816331 (1974-06-01), Brown, Jr. et al.
patent: 4379071 (1983-04-01), Schnoring et al.

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