Electrochromic composition
First Claim
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1. An electrochromic composition comprising:
- at least one reducing compound; and
at least two electrochromic oxidizing compounds,wherein said electrochromic oxidizing compounds have similar oxydo-reduction potentials, and are selected from viologen derivatives of formulae (I) and (II);
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Abstract
The present invention relates to an electrochromic composition comprising at least one reducing compound and at least two oxidizing compounds, said at least two oxidizing compounds having similar oxydo-reduction potentials. More specifically, said at least two oxidizing compounds are selected from viologen derivatives. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.
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15 Claims
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1. An electrochromic composition comprising:
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at least one reducing compound; and at least two electrochromic oxidizing compounds, wherein said electrochromic oxidizing compounds have similar oxydo-reduction potentials, and are selected from viologen derivatives of formulae (I) and (II); - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification