Fully compatible surfactant-impregnated water-soluble...

C - Chemistry – Metallurgy – 05 – G

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C05G 3/06 (2006.01) A01N 25/30 (2006.01)

Patent

CA 2283414

Solid surfactant-impregnated, water-soluble fertilizer compositions are disclosed together with aqueous concentrates made therefrom. The use of dilute aqueous compositions made from said concentrates to enhance the rewetting of water uniformity and nutrient retention characteristic of initially untreated plant culture media is also disclosed. The fertilizer composition solids are friable and are composed of from 65 to 99 weight percent water-soluble fertilizer, and from 1 to 35 weight percent of a surfactant system comprising water-soluble nonionic surfactant and alkyl polyglycoside in a weight ratio of from less than 2:1 to 1:5. When these solid compositions are dissolved in water to form concentrates having from 20 to 50 weight percent fertilizer, the concentrates are both single phased and extremely stable.

L'invention concerne des compositions solides hydrosolubles d'engrais, imprégnées de tensioactifs, ainsi que des concentrés aqueux fabriqués à partir de ces compositions. L'invention concerne également l'utilisation de compositions aqueuses diluées fabriquées à partir desdits concentrés, ces compositions favorisant la réhumidification uniforme et la rétention de nutriments des milieux de culture végétale initialement non traités. Les solides de cette composition d'engrais sont friables, et composés de 65 à 99 % en poids d'engrais hydrosoluble, et de 1 à 35 % en poids d'une solution de tensioactifs, renfermant un tensioactif nonionique hydrosoluble ainsi qu'un polyglycoside alkyle, dans un rapport pondéral variant entre 2:1 et 1:5. Lorsque ces compositions solides sont dissoutes dans l'eau pour former des concentrés renfermant 20 à 50 % en poids d'engrais, ces concentrés sont à la fois monophasés et extrêmement stables.

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