Formation of microcapsules by interfacial cross-linking, microca

Details Formation of microcapsules by interfacial cross-linking, microca Formation of microcapsules by interfacial cross-linking, microca

1977-01-18

1979-02-06

Lovering, Richard D.

Compositions

Preservative agents

Anti-corrosion

252 621P, 424 32, 424 34, 424 35, 424 36, 424 37, 427151, 427153, 428307, 428914, B01J 1302

Patent

active

041383621

ABSTRACT:
Pressure-rupturable, oil-containing microcapsules are produced by admixing a water-immiscible, oily material containing an oil-soluble, non-polymeric polyfunctional isocyanate cross-linking agent, and an aqueous solution of a polymeric emulsifying agent in the form of a water-soluble polymer containing recurring --NH.sub.2 or .dbd.NH groups or a water-soluble natural gum containing recurring hydroxy groups. An oil-in-water emulsion is formed containing the isocyanate dispersed in the form of microscopic emulsion droplets in the aqueous continuous phase containing the emulsifying agent, and a solid capsule wall is formed by the cross-linking of the emulsifying agent by the isocyanate. Emulsions utilizing the natural polymeric emulsifying agents preferably contain a viscosity lowering agent in the form of a urea-formaldehyde or alkali metal periodate in order to obtain a higher solids coat weight while at an efficient coating viscosity.

REFERENCES:
patent: 2460980 (1949-02-01), Fraenkel-Conrat et al.
patent: 3016308 (1962-01-01), Macaulay
patent: 3069370 (1962-12-01), Jensen et al.
patent: 3137631 (1964-06-01), Soloway
patent: 3429827 (1969-02-01), Ruus
patent: 3432327 (1969-03-01), Kan et al.
patent: 3669899 (1972-06-01), Vassiliades et al.
patent: 3875074 (1975-04-01), Vassiliades et al.
patent: 3886085 (1975-05-01), Kiritani et al.

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