25-07-2019 дата публикации
Номер: US20190224323A1
Принадлежит:
The present disclosure is directed to a class of fluorinated copolymers, such as PTFE copolymers, that can be dissolved in low toxicity solvents, such as Class III Solvents, and that enable the creation of stable water-in-solvent emulsions comprising the fluorinated copolymers dissolved in a low toxicity solvents and a hydrophilic agent (e.g., a therapeutic agent) dissolved in an aqueous solvent, such as water or saline. 125.-. (canceled)26. A composition comprising:a low toxicity organic solvent selected from the group consisting of acetic acid, acetone, 1-butanol, 2-butanol, butyl acetate, dimethyl sulfoxide, ethanol, ethyl acetate, ethyl formate, formic acid, isobutyl acetate, isopropyl acetate, methyl acetate, 3-methyl-1-butanol, methylethyl ketone, methylisobutyl ketone, 2-methyl-1-propanol, 1-pentanol, 1-propanol, 2-propanol, propyl acetate, methyl acetate, propylene glycol, acetonitrile, dioxane, formamide, dimethylformamide, pyridine, n-Methyl-2-pyrrolidone, methylpyrrolidone, dimethylacetamide, ethylene glycol, m ethyoxym ethanol, pyridine, piperidine, sulfolane, tetrahydrofuran, trichloroacetic acid, polyethylene glycol, and polyethylene oxide; anda fluorinated copolymer dissolved in the organic solvent, the fluorinated copolymer comprising tetrafluoroethylene and at least one functional group selected from the group consisting of acetate, alcohol, amine, and amide.27. The composition of claim 26 , further comprising a water phase suspended in the organic solvent as an emulsion.28. The composition of claim 27 , further comprising a therapeutic agent dissolved in the water phase.29. The composition of claim 26 , wherein the fluorinated copolymer is one of poly(tetrafluoroethylene-co-vinyl acetate) (TFE-VAc) claim 26 , poly(tetrafluoroethylene-co-vinyl alcohol) (TFE-VOH) claim 26 , and poly(tetrafluoroethylene-co-vinyl alcohol-co-vinyl[aminobutyraldehyde acetal]) (TFE-VOH-AcAm).30. The composition of claim 26 , wherein the fluorinated copolymer comprises up ...
Подробнее