Process for the production of microcapsules

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

1981-06-08

1983-11-01

Lovering, Richard D.

Plastic and nonmetallic article shaping or treating: processes

Encapsulating normally liquid material

Liquid encapsulation utilizing an emulsion or dispersion to...

8526, 71DIG1, 252350, 252364, 252426, 252522A, 252604, 252610, 4283206, 42840221, 428914, B01J 1302

Patent

active

044129599

ABSTRACT:
A process for the production of microcapsules by interfacial polyreaction, which comprises mixing a first reactant with an emulsion of a solution of a material to be encapsulated and a second reactant whereby the first and second reactants react to form a capsule containing the said material and wherein the second reactant dissolved in the disperse phase is a nitrogen-containing heterocyclic compound corresponding to one of the formulae I, II or III ##STR1## wherein at least two of the radicals A, B, D and E are halogen atoms, ammonium, hydrazinium, sulfonium, optionally substituted alkyl sulfonyl, aryl sulfonyl, aralkyl sulfonium, azido, aryloxy, thiocyano arylthio and sulfonic acid residues which are reactive under the conditions of the capsule-forming reaction and the remaining radicals A, B, D, E are hydrogen, alkyl, aryl, alkoxy, phenoxy, alkylamino or phenylamino radicals which are not reactive under the conditions of the capsule-forming reaction.

REFERENCES:
patent: 1911689 (1933-05-01), Hentrich et al.
patent: 3328257 (1967-06-01), Vrancken et al.
patent: 3432327 (1969-03-01), Kan et al.
patent: 3577515 (1971-05-01), Vandegaer

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