Methods of synthesis of polysuccinimide, copolymers of polysuccinimide and derivatives thereof
AssigneeFolia, Inc.
InventorGraham Swift
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Abstract
Disclosed are methods of synthesis of polysuccinimide, copolymers, derivatives and blends with additives thereof, using a supercritical fluid. Also disclosed are methods of isolating, compounding, stabilizing and processing the polysucciminide, its copolymers and derivatives.
Claims99
A method for preparing a polysuccinimide, which comprises, subjecting aspartic acid to polymerization in a solvent of supercritical fluid to form a polysuccinimide;
- wherein said supercritical fluid is selected from the group consisting of CO2, NH3, H2O, N2O, xenon, krypton, methane, ethane, ethylene, propane, pentane, methanol, ethanol, isopropanol, isobutanol, CClF3, CFH3, cyclohexanol, CS2, and a mixture thereof;
- and wherein the supercritical fluid is used in conjunction with a cosolvent;
- and wherein the cosolvent is selected from the group consisting of trans-2-hexenyl acetate, ethyl trans-3-hexenoate, methyl caproate, isobutyl isobutyrate, butyl acetate, butyl methacrylate, hexyl acetate, butyl butyrate, pentyl propionate, methyl ethanoate, ethyl caproate, methyl dodecanoate, 2-ethylbutyl acetate, methyl oleate, dodecyl acetate, methyl tridecanoate, soybean oil methyl esters, hexane, heptane, tetradecane, hexadecane, toluene, 1 -hexadecene, 1-dodecanol, 1 -nonanol and a mixture thereof.
A method for preparing a polysuccinimide, which comprises, subjecting aspartic acid to polymerization in a solvent of supercritical fluid to form a polysuccinimide, wherein said polymerization is carried out in the presence of a catalyst to form the polysuccinimide.
A method for preparing a polysuccinimide, which comprises, subjecting aspartic acid to polymerization in a solvent of supercritical fluid to form a polysuccinimide;
- wherein said polysuccinimide is blended with an additive in the supercritical fluid.
A method for preparing a copolymer containing copolymerized aspartate units and succinimide units which comprises, subjecting a comonomer mixture of aspartic acid and a salt of aspartic acid to polymerization in a solvent of a supercritical fluid;
- wherein said comonomer mixture is prepared by drying a solution of a salt of aspartic acid having a cation which does not volatilize during the drying and a salt of aspartic acid having a cation which at least partially volatilizes to free aspartic acid during the drying;
- wherein said supercritical fluid is selected from the group consisting of CO2, NH3, H2O, N2O, xenon, krypton, methane, ethane, ethylene, propane, pentane, methanol, ethanol, isopropanol, isobutanol, CCIF3, CFH3, cyclohexanol, CS2, and a mixture thereof;
- and wherein the supercritical fluid solvent is used in conjunction with a cosolvent.
A method for preparing a copolymer containing copolymerized aspartate units and succinimide units which comprises, subjecting a comonomer mixture of aspartic acid and a salt of aspartic acid to polymerization in a solvent of a supercritical fluid;
- wherein said comonomer mixture is prepared by drying a solution of a salt of aspartic acid having a cation which does not volatilize during the drying and a salt of aspartic acid having a cation which at least partially volatilizes to free aspartic acid during the drying;
- wherein said supercritical fluid is selected from the group consisting of CO2, NH3, H2O, N2O, xenon, krypton, methane, ethane, ethylene, propane, pentane, methanol, ethanol, isopropanol, isobutanol, CCIF3, CFH3, cyclohexanol, CS2, and a mixture thereof;
- wherein said polymerization is carried out in the presence of a catalyst to form the copolymer containing aspartate units and succinimide units.
A method for preparing a copolymer containing succinimide moieties, which comprises, polymerizing L-aspartic acid in a supercritical fluid, in the presence of an end-capping initiator to form the copolymer.
A method for preparing a copolymer of L-aspartic acid, which comprises, polymerizing L-aspartic acid in a supercritical fluid, in the presence of an end-capping initiator and a catalyst to form the copolymer of L-aspartic acid.
A method for preparing a polysuccinimide derivative, which comprises, forming said polysuccinimide in a supercritical fluid, and subjecting the polysuccinimide, in the supercritical fluid, to a ring-opening reaction.
Dependencies are inferred from the claim text.