Microencapsulated naturally occuring pyrethrins

Details Microencapsulated naturally occuring pyrethrins Microencapsulated naturally occuring pyrethrins

1983-02-25

1985-02-05

Lovering, Richard D.

Drug, bio-affecting and body treating compositions

Solid synthetic organic polymer as designated organic active...

Polymer from ethylenic monomers only

264 47, 424 19, 42840221, A01N 2528, A61K 952, A61K 958, B01J 1302

Patent

active

044977930

ABSTRACT:
A process for microencapsulating naturally-occurring pyrethrins with a polyamide-polyurea shell by interfacial condensation which includes slowly adding an amine reactant to an aqueous emulsion containing the pyrethrin, an isocyanate, and an acyl halide with the requirement that at least one of said isocyanate or said acyl halide is polyfunctional, to provide free flowing capsules having a polyamide-polyurea wall encapsulating the natural pyrethrin.

REFERENCES:
patent: 3270100 (1966-08-01), Jolkovski et al.
patent: 3429827 (1969-02-01), Ruus
patent: 3577515 (1971-05-01), Vandegaer
patent: 3959464 (1976-05-01), DeSavigny
patent: 4056610 (1977-11-01), Barber, Jr. et al.
R. Cremlyn: Pesticides, John Wiley & Sons (1978), pp. 39-49.

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