Quick drying polymeric coating

摘要

Improved agriculturally useful products are provided, including solid materials such as nitrogenous fertilizers (e.g., urea), together with a polycarboxylated polymer selected from the group consisting of a salts of copolymers containing individual quantities of maleic and itaconic moieties. The polymer composition also includes from about 10-60% by weight of an organic drying agent such as a lower alcohol which enhances the quick drying properties thereof. The compositions may also include an amount of boron, and bimodal vinylic polymer made up of quantities of high and low molecular weight (MW) vinylic polymers such as PVA.

主权项

1. A fertilizer product for application to soil, comprising:
a quantity of a solid fertilizer; the dried residue of a polymer-containing composition on said fertilizer, said polymer-containing composition including a substantially water soluble copolymer containing individual quantities of maleic and itaconic moieties, water, an organic compound drying agent, and an amount of boron as boric acid, said composition having a pH of from about 1-4, said fertilizer product prepared by initially formulating said aqueous polymer-containing composition, then applying the formulated polymer-containing composition to said fertilizer, and thereafter allowing said drying agent and a substantial part of the water present in the composition to evaporate to leave said dried residue of said polymer-containing composition on said fertilizer, so that the fertilizer product does not include said drying agent or water to any substantial degree, the amount of boric acid in the composition operable to reduce the time required to achieve said evaporation of said drying agent and water, as compared with the composition free of boric acid, whereby the fertilizer product as applied to soil does not have any substantial quantities of the drying agent and water which formed a part of the polymer-containing composition initially applied to said solid fertilizer.