Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of vinylic and dicarboxylic monomers such as vinyl acetate or vinyl alcohol and maleic anhydride, itaconic anhydride or citraconic anhydride, or combinations thereof. Free radical polymerization is used in the synthesis of the polymers, which are then hydrolyzed to replace ester groups with alcohol groups. The polymers may be complexed with ions and/or mixed with fertilizers or seed to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly, to seeds, to fertilizer, or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.
本发明揭示了可
生物降解的阴离子聚合物,其中包括重复的聚合亚单位,优选由
乙烯基单体和二
羧酸单体组成,例如
乙酸乙烯酯或
乙醇乙烯酮和
马来酸酐、伊
曲酸酐或顺-
柠檬酸酐或其组合。在聚合物的合成中使用自由基聚合,然后通过
水解将酯基替换为醇基。聚合物可以与离子复合物和/或混合肥料或种子,以产生农业有用的组合物。本发明的优选产品可以叶面施用,用于种子、肥料或靠近生长植物的土壤,以增强植物的营养吸收。