Thiosulfate polymer compositions and articles
AssigneeEastman Kodak Company
InventorsDeepak Shukla, Mark R. Mis, Dianne Marie Meyer
Life of this patent
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Abstract
A thiosulfate polymer composition includes an electron-accepting photosensitizer component, either as a separate compound or as an attachment to the thiosulfate polymer. The thiosulfate polymer composition can be applied to various articles, or used to form a predetermined polymeric pattern after photothermal reaction to form crosslinked disulfide bonds, removing non-crosslinked polymer, and reaction with a disulfide-reactive material. Such thiosulfate polymer compositions can also be used to sequester metals in nanoparticulate form, and as a way for shaping human hair in hairdressing operations.
Claims21
A composition comprising a thiosulfate polymer and an electron-accepting photosensitizer component, provided that when the electron-accepting photosensitizer component is not covalently attached to the thiosulfate polymer, it has a spectral absorption of less than 750 nm.
A thiosulfate composition comprises:
- a thiosulfate copolymer comprising an electron-accepting photosensitizer component, an ionomer, and a thiosulfate group as a side chain, which thiosulfate copolymer is capable of undergoing a chemical transformation upon single electron oxidation upon photoexposure, thus causing a change in solubility of the thiosulfate copolymer that has been photoexposed, and
- a tetraalkyl ammonium ion.
Dependencies are inferred from the claim text.