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,其包括重复的聚合亚单位,优选由
乙烯醋酸酯或
乙烯醇和
马来酸酐、顺式顺酐或反式顺酐等二
羧酸单体组成。在合成聚合物时采用自由基聚合,然后
水解以用醇基替换酯基。聚合物可以与离子复合并/或与肥料或种子混合,以产生农业上有用的组合物。本发明的优选产品可以叶面施用、施于种子、肥料或施于生长植物相邻的土壤,以增强植物对养分的吸收。