Microcapsules, process for their formation and transfer sheet re

Details Microcapsules, process for their formation and transfer sheet re Microcapsules, process for their formation and transfer sheet re

1971-04-08

1976-11-23

Lovering, Richard D.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

71 64F, 252316, 264 4, 424 17, 424 19, 424 32, 426 89, 426302, 427151, 427152, 428914, B41M 500, B01J 1302

Patent

active

039938310

ABSTRACT:
Microcapsules containing oily droplets are produced in the absence of coacervation by admixing a partially condensed, formaldehyde condensation product in an aqueous medium and an oil-in-water emulsion, which emulsion comprises water-immiscible oily material as the disperse phase and an aqueous colloidal solution of an amphiphilic emulsifying agent as the dispersion medium. This single admixing effects the separation of the resin from the aqueous medium and precipitation thereof in solid particle form about a nucleus of the oily material, and the resulting microcapsules have a high degree of structural integrity.

REFERENCES:
patent: 2969331 (1961-01-01), Brynko et al.
patent: 3016308 (1962-01-01), Macaulay
patent: 3257267 (1966-06-01), Hay
patent: 3418656 (1968-12-01), Vassiliades

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