Controlled-release agricultural chemical formulation

A - Human Necessities – 01 – N

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Details

A01N 25/00 (2006.01) A01N 25/08 (2006.01) A01N 25/10 (2006.01) A01N 25/12 (2006.01) A01N 43/50 (2006.01) A01N 47/30 (2006.01) A01N 47/44 (2006.01)

Patent

CA 2576098

An object of the present invention is to provide an agricultural chemical formulation which is able to control release of an agricultural chemical active ingredient. This agricultural chemical formulation includes a composition, containing an agricultural chemical active ingredient, styrene-maleic anhydride copolymer or mixture of styrene-maleic anhydride copolymer and polymer having repeating units derived from rosin or derivative thereof or salicylic acid or derivative thereof, and a release controller (a water-soluble polymer, a hydrophobically-treated silicon oxide, or a surfactant), forming a compatible state or matrix.

L'invention porte sur une préparation agrico-chimique dans laquelle la libération d'un ingrédient actif agrico-chimique peut être régulée. La préparation agrico-chimique est caractérisée en ce qu'elle comprend une composition contenant un ingrédient actif agrico-chimique, soit un copolymère styrène/anhydrure maléique soit un mélange de celui-ci avec un polymère ayant des unités répétées dérivé de résine de pin, un dérivé de résine de pin, de l'acide salicylique ou bien un dérivé d'acide salicylique et un agent de régulation de libération (polymère soluble dans l'eau, oxyde de silicium ou tensioactif), la composition étant sous forme rendue compatible ou matricielle.

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