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US 9,428,668 B2Granted
Hydrophilic polymer composition and method of forming a hydrophilic polycaprolactone
OwnerStewart J. Lustgarteninventor
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OwnerStewart J. Lustgarteninventor
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A hydrophilic cross-linked ionic polycaprolactone polymer composition formed by the process of subjecting hydrophobic caprolactone or a hydrophobic caprolactone monomer to a source of ionizing radiation selected from the group consisting of an Electron Acceleration (E beam), Gamma II, Cobolt, X-ray or a source of UV radiation to form an ionic cross linked polycaprolactone polymer consisting of a soluble component part and an insoluble component part in a gel fraction % of soluble to insoluble parts, adjusting the duration of ionizing radiation and/or the intensity of the radiation until the concentration of the soluble component part is above at least about 65% by weight of the cross linked polymer wherein the cross linked polycaprolactone polymer is converted from a hydrophobic to a hydrophilic state. A coating of the hydrophobic polycaprolactone when in contact with water forms a boundary layer with very low contact angle.
A hydrophilic cross-linked ionic polycaprolactone polymer composition formed by the process of subjecting hydrophobic caprolactone or a hydrophobic caprolactone monomer to a source of ionizing radiation selected from the group consisting of an Electron Acceleration (E beam), Gamma II, Cobolt, X-ray or a source of UV radiation to cross link the hydrophobic caprolactone monomer or hydrophobic caprolactone into an ionic cross linked polycaprolactone polymer consisting of a soluble component part and an insoluble component part in a gel fraction % of soluble to insoluble parts, adjusting the duration of ionizing radiation and/or the intensity of the radiation until the concentration of the soluble component part is above at least about 65% by weight of the cross linked polymer wherein the cross linked polycaprolactone polymer is converted from hydrophobic polycprolactone to an ionic hydrophilic polycaprolactone and wherein the soluble component part is soluble in a solvent selected from the group consisting of methyl ethyl ketone (“MEK”), ethyl acetate, tetetrahydrafuran and trichloromethane.
A method of forming an ionic hydrophilic polycaprolactone comprising the steps of subjecting hydrophobic polycaprolactone or a hydrophobic caprolactone monomer to a source of ionizing radiation selected from the group consisting of an Electron Acceleration (E beam), Gamma II, Cobolt, X-ray or a source of UV radiation of an intensity sufficient to crosslink the hydrophobic caprolactone monomer or hydrophobic caprolactone for forming an ionic cross linked polycaprolactone polymeric composition consisting of a soluble component part and an insoluble component part in a gel fraction % of soluble to insoluble parts, adjusting the duration of ionizing radiation and/or the intensity of the radiation until the concentration of the soluble component part is above at least about 65% by weight of the cross linked polymer wherein the cross linked polycaprolactone polymer is converted from hydrophobic polycprolactone to hydrophilic polycaprolactone and wherein the soluble component part is soluble in a solvent selected from the group consisting of methyl ethyl ketone (“MEK”), ethyl acetate, tetetrahydrafuran and trichloromethane.
Dependencies are inferred from the claim text.