IMPROVED FERTILISERS WITH POLYMER AUXILIARY SUBSTANCES Russian patent published in 2015 - IPC C05G3/00 

FIELD: chemistry.

SUBSTANCE: invention relates to fertiliser compositions and methods. A fertiliser composition contains suitable amounts of mineral fertiliser, selected from a group consisting of gypsum, one or more members of the kieserite group, potassium-magnesium sulphate, elementary sulphur and mixtures thereof, and a copolymer which is in contact with said mineral fertiliser, where said copolymer is selected from a group consisting of copolymers of acids or salts, containing separate amounts of maleic and itaconic fragments. A soil fertilisation method includes a step of adding the fertiliser composition to the soil. A method of producing the fertiliser composition includes steps of providing an amount of mineral fertiliser and at least partially coating said mineral fertiliser with a copolymer, wherein said copolymer is in an aqueous dispersion having pH of approximately 0.1 to 2, and said dispersion is substantially allowed to dry so that the dry residue of the aqueous dispersion is in contact with the mineral fertiliser, and where said copolymer is present in such a concentration that assimilation of the sulphate and/or calcium and/or magnesium ion by plants is greater than corresponding assimilation of the mineral fertiliser without a coating.

EFFECT: invention speeds up assimilation of ions in soil.

19 cl, 4 tbl, 3 ex