Water-in-oil microencapsulation process and microcapsules produc

Details Water-in-oil microencapsulation process and microcapsules produc Water-in-oil microencapsulation process and microcapsules produc

1997-12-19

2000-09-05

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

424457, 424497, 264 47, A01N 2534, A61K 952, A61K 916, B01J 1302

Patent

active

061139351

ABSTRACT:
A suspension of microcapsules in an organic liquid, the microcapsules containing an aqueous phase, is produced by interfacial polymerization in the presence of a proton transfer catalyst of a water-in-oil emulsion in which the aqueous phase contains a urea/formaldehyde or melamine/formaldehyde prepolymer.

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patent: 5666785 (1997-09-01), Jouffreau et al.
patent: 5858384 (1999-01-01), Levy

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