Electrochromic printing medium
First Claim
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1. An electrochromic printing medium comprising a support having an electrochromic composition coated thereon, said composition comprising an electrolyte and a leuco dye, wherein said electrolyte is a two-phase interpenetrating network comprising a solid polymeric supporting matrix and a liquid interpenetrating conductive phase.
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Abstract
An electrochromic printing medium comprising a solid support having an electrochromic composition coated thereon comprising an electrolyte matrix, a radiation-inert ionically conducting liquid, and an ionizable alkali or ammonium slat; a method for preparing such medium; and a method for forming an image employing such electrochromic printing medium.
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Citations
20 Claims
- 1. An electrochromic printing medium comprising a support having an electrochromic composition coated thereon, said composition comprising an electrolyte and a leuco dye, wherein said electrolyte is a two-phase interpenetrating network comprising a solid polymeric supporting matrix and a liquid interpenetrating conductive phase.
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12. A method for preparing an electrochromic printing medium for use in electrochromic printing which comprises applying to a surface of a support (1) an electrolyte, said electrolyte comprising a radiation polymerizable or crosslinkable unsaturated compound, a radiation-inert ionically conducting liquid, said ionically conducting liquid being an aprotic polar compound, and an ionizable alkali metal or ammonium salt;
- and (2) a leuco dye; and
subjecting said medium to actinic radiation to thereby polymerize or crosslink said radiation polymerizable or crosslinkable compound. - View Dependent Claims (13)
- and (2) a leuco dye; and
- 14. A method for electrochromic printing which comprises applying an image forming voltage across an electrochromic printable medium in a predetermined pattern to form an image, said electrochromic printable medium comprising a support having coated on the surface thereof an electrochromic film composition comprising an electrolyte and a leuco dye, said electrolye comprising a two-phase interpenetrating network of a solid polymeric supporting matrix and a liquid interpenetrating conductive phase.
Specification