Dispersion having an insecticidal action
AssigneeEvonik Degussa GmbH
InventorsWolfgang Lortz, Jochen Scheffler, Gabriele Perlet
Life of this patent
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Abstract
Dispersion containing, in addition to water, 0.5 to 20 wt. % of hydrophobic silica, 0.01 to 10 wt. % of a gelling or viscosity-increasing additive, 0.1 to 1 wt. % of a preservative and 0 to 1 wt. % of a surface-active substance. It is prepared by a procedure in which the individual components are dispersed successively or together into the water and in this procedure the individual components are deaerated before and/or during the addition or the dispersion is deaerated during the individual dispersing steps. The dispersion can be employed as an insecticide.
Claims6
An insecticidal composition which consists of a finely deaerated dispersion of 0.5 to 20 wt. % of hydrophobic silica after-treated with polydimethylsiloxane or hexamethyldisilazane, 0.01 to 10 wt. % of a gelling or viscosity-increasing additive, 0.1 to 1 wt. % of a preservative, and 0 to 1 wt. % of a surfactant in water, wherein desorbed air has been removed by fine deaeration to yield the finely deaerated dispersion having a density of 0.7 to 1.02 g/ml and confer its insecticidal activity.
An insecticidal composition consisting of demineralized water;
- 3% fumed hydrophobic silica after-treated with polydimethylsiloxane or hexamethyldisilazane;
- 1.5% xanthan gum;
- 0.2% lecithin;
- and a preservative, wherein desorbed air has been removed by fine deaeration to yield a finely deaerated dispersion having a density of approximately 1.0 g/ml, and said finely deaerated dispersion exhibits insecticidal activity.
Dependencies are inferred from the claim text.