Production of microcapsules having walls of polyaddition product

Details Production of microcapsules having walls of polyaddition product Production of microcapsules having walls of polyaddition product

1983-06-21

1985-05-14

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

252350, 252609, 346215, 346222, 42840221, 42840224, 430138, 430903, 502 8, 521 53, B01J 1302

Patent

active

045171416

ABSTRACT:
Microcapsules having a hydrophobic core material and capsule walls formed by the reaction of water-insoluble polyamines with water-soluble bisulphite adducts of polyisocyanates, a process for the production thereof which is characterized in that a mixture of a hydrophobic core material and water-insoluble polyamines is emulsified in water or in an aqueous protective colloid solution to the required particle size, water-soluble bisulphite adducts of polyisocyanates in the form of powders or aqueous solutions are added and the mixture is left to react to completion at temperatures of from 1.degree. to 140.degree. C., and applications thereof.

REFERENCES:
patent: 3577515 (1971-05-01), Vandegaer
patent: 3723372 (1973-03-01), Wakimoto et al.
patent: 3725501 (1973-04-01), Hilbelink et al.
patent: 4076774 (1978-02-01), Short

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