Pesticides formulations

Details Pesticides formulations Pesticides formulations

2004-02-26

2011-10-04

Woodward, Cherie M (Department: 1619)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Biocides; animal or insect repellents or attractants

C504S363000, C504S364000, C504S100000

Reexamination Certificate

active

08029813

ABSTRACT:
Concentrated microemulsions comprising: 1) 10-25 parts by weight of a pesticide with a solubility in water 20° C. lower than 1% by weight and having a melting point from 10° C. to 60° C.; 2) 8-25 parts by weight of one or more solvents containing oxygen atoms, having a solubility in water at 20° C. lower than 5% by weight and the Hildebrand solubility parameter in the range 16-21 MPa1/2: 3) 10-20 parts by weight of a polyol; 4) 10-25 parts by weight of one or more non ionic surfactants having a HLB value from 9 to 15; 5) 2-10 parts by weight of one or more anionic surfactants: 6) water up to 100 parts by weight; wherein—the ratio by weight between 2) and 1) ranges from 0.8:1 to 1.5:1;—the ratio by weight between 4)+5) and 1) is in the range 0.5:1-3:1;—the ratio by weight between 4) and 5) ranges from 1:1 to 4.1.

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Griffin, W.C., “Classification of Surface-Active Agents by “HLB””,Journal Society Cosmetic Chemists 1, 311-326, 1949.

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