Anionic polymers composed of dicarboxylic acids and uses thereof
AssigneeSpecialty Fertilizer Products, LLC
InventorsJohn Larry Sanders, Grigory Mazo, Jacob Mazo
Life of this patent
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Abstract
Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.
Claims48
A method of enhancing the growth of plants comprising the step of applying to said p or the earth adjacent said plants a growth-enhancing amount of a composition comprisi polymer, comprising recurring subunits polymeric subunits each made up of at least two different moieties individually and respectively taken from the group consisting of B, and moieties, or recurring C moieties, where moiety B is of the general formula
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- wherein each R7 is individually and respectively selected from the group consisting of H OH, C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straigh branched chain and cyclic alkyl or aryl formate (C0), acetate (C1) propionate (C2), butyrate (C3), etc. up to C30 based ester groups, R′CO2 groups, OR′ groups and COO groups, wherein R′ is selected from the group consisting of C1-C30 straight, branched chain and cyclic alkyl or aryl groups and X is selected from the group consisting of H, th alkali metals, NH4 and the C1-C4 alkyl ammonium groups, R3 and R4 are individual and respectively selected from the group consisting of H, C1-C30 straight, branched c and cyclic alkyl or aryl groups, R5, R6, R10 and R11 are individually and respectively selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, Co Mo, V and Ca, and R8 and R9 are individually and respectively selected from the group consisting of nothing (i.e., the groups are non-existent), CH2, C2H4, and C3H6, e of said moieties having or being modified to have a total of two COO groups therein.
A method of forming a polymer comprising the steps of:
- providing a reaction mixture comprising at least two different reactants selected from t group consisting of first and second or a mixture of said second reactants, wherein sai reactant is of the general formula
- and said second reactant is of the general formula
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- and said second reactant is of the general formula
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- wherein each R7 is individually and respectively selected from the group consisting of C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straight, branched chain and cyclic alkyl or aryl formate (C0), acetate (C1), propionate (C2), butyrate (C3), etc. up to C30 based ester groups, R′CO2 groups, OR′ groups and COO groups, wherein R′ is selected from the group consisting of C1-C30 straight, branche chain and cyclic alkyl or aryl groups and X is selected from the group consisting of H, t alkali metals, NH4 and the C1-C4 alkyl ammonium groups, R3 and R4 are individua and respectively selected from the group consisting of H, C1-C30 straight, branched and cyclic alkyl or aryl groups, R5, R6, R10 and R11 are individually and respectivel selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, C Mo, V and Ca, and R8 and R9 are individually and respectively selected from the group consisting of nothing (i.e., the groups are non-existent), CH2, C2H4, and C3H6, of said moieties having or being modified to have a total of two COO groups therein;
- an
- polymerizing said reaction mixture to form a polymer having recurring polymeric subu therein with carboxyl-containing groups.
A composition for enhancing plant growth comprising a dicarboxylic acid polymer h recurring polymeric subunits each made up of at least two different moieties individual respectively taken from the group consisting of B and C moieties, or recurring C moieti wherein moiety B is of the general formula
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- and moiety C is of the general formula
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- wherein each R7 is individually and respectively selected from the group consisting of OH, C1-C30 straight, branched chain and cyclic alkyl or aryl groups, C1-C30 straig branched chain and cyclic alkyl or aryl formate (C0) acetate (C1) propionate (C2), butyrate (C3), etc. up to C30 based ester groups, R′CO2 groups, OR′ groups and COO groups, wherein R′ is selected from the group consisting of C1-C30 straight, branche chain and cyclic alkyl or aryl groups and X is selected from the group consisting of H, t alkali metals, NH4 and the C1-C4 alkyl ammonium groups, R3 and R4 are individua and respectively selected from the group consisting of H, C1-C30 straight, branched and cyclic alkyl or aryl groups, R5, R6, R10 and R11 are individually and respectivel selected from the group consisting of H, the alkali metals, NH4 and the C1-C4 alkyl ammonium groups, Y is selected from the group consisting of Fe, Mn, Mg, Zn, Cu, Ni, C Mo, V and Ca, and R8 and R9 are individually and respectively selected from the group consisting of nothing (i.e., the groups are non-existent), CH2, C2H4, and C3H6, of said moieties having or being modified to have a total of two COO groups therein.
Dependencies are inferred from the claim text.