Composition for coating substrates
View Patent ↗The present invention provides an aqueous dispersion comprising (a) an active agent which is a humic substance and (b) fumed silica, wherein: the % by weight of the active agent with respect to the total weight of the dispersion is comprised from 1 to 50%; and the weight ratio between the active agent and the fumed silica is comprised from 1.5:1 to 75:1, particularly from 1.5:1 to 60:1. The invention also provides a process for its preparation as well its use as in coating a substrate, and the resulting coated substrate. The dispersion of the invention allows increasing the amount of humic substances without negatively affecting the stability of the granule (in terms of dust and caking).
1 . An agrochemical aqueous dispersion comprising (a) an active agent which is a humic substance and (b) a hydrophobic fumed silica, wherein
the % by weight of the active agent with respect to the total weight of the dispersion is from 26% to 36.4%; and
the weight ratio between the active agent and the hydrophobic fumed silica is from 21.7:1 to 46.5:1.
2 . The agrochemical aqueous dispersion of claim 1 , wherein the humic substance comprises humic acid, or alternatively, fulvic acid, or alternatively, a combination of humic and fulvic acids.
3 . The agrochemical aqueous dispersion of claim 1 , wherein the humic substance comprises humic acid at a percentage by weight with respect to the total weight of the humic substance in the range from 5-90%, and fulvic acid at a percentage by weight with respect to the total weight of the humic substance in the range from 10-95%, the sum of both ingredients being 100% by weight.
4 . The agrochemical aqueous dispersion of claim 1 , further comprising one or more biostimulant(s).
5 . A process for preparing the agrochemical aqueous dispersion of claim 1 , comprising mixing a hydrophobic fumed silica with an active agent which is a humic substance, wherein
the % by weight of the active agent with respect to the total weight of the dispersion is from 26% to 36.4%; and
the weight ratio between the active agent and the hydrophobic fumed silica is from 21.7:1 to 46.5:1.
6 . A process for coating a substrate selected from fertilizer granule and seed, the process comprising applying the agrochemical aqueous dispersion of claim 1 on a surface of the substrate.
7 . The process according to claim 6 , wherein the agrochemical aqueous dispersion is applied on the substrate's surface by dripping or spraying.
8 . A coated fertilizer granule or seed obtainable by the process of claim 6 .
9 . The coated fertilizer granule or seed of claim 8 , wherein the percentage by weight of the active agent is from 0.01 to 3.5% with respect to the total weight of the coated granule or seed.
10 . A method for stimulating the growth of a plant, the method comprising applying the aqueous dispersion of claim 1 to a substrate's surface.