Method for providing a stable protective coating for UV sensitiv

Details Method for providing a stable protective coating for UV sensitiv Method for providing a stable protective coating for UV sensitiv

1998-04-09

1999-08-17

Levy, Neil S.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

424408, 424417, 424419, 424493, 4241951, 424 9346, 530500, 4272133, 42721336, A01N 2528

Patent

active

059390891

ABSTRACT:
A method of encapsulating a pesticide with an ultraviolet protectant comprises the steps of forming a slurry of a pesticide and a lignin-containing material, and spraying a stream of acid and the slurry into contact with one another to precipitate the lignin-containing material onto the pesticide and form a protective coating on the pesticide. The pesticide is preferably a biopesticide, and the lignin-containing material is preferably kraft lignin. The method is easily adapted to industrial processes currently used for pesticide production by simply changing the spray drier from a single nozzle system to a dual spray nozzle and then adding the acid stream to the dual nozzle.

REFERENCES:
patent: 5292533 (1994-03-01), McMahon et al.
patent: 5552149 (1996-09-01), Lebo, Jr. et al.
patent: 5608040 (1997-03-01), Huttermann et al.
patent: 5720792 (1998-02-01), Fischer et al.

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