Acreo Ab

De La Rue International Limited

Lars-Olov Bror Hennerdal

Tommi Remonen

Anna Malmström

Staffan Nordlinder

Luc H Leenders

Thomas Kugler

Johan J Lamotte

Magnus Berggren

Nigel P Gould

Mats Robertsson

Mats Sandberg

James Peter Snelling

Petronella Norberg

Jessica Häll

Philip George Cooper

Anurak Sawatdee

Xin Wang

Fereidoun Abbasi

Adam Joseph Howard Batting

This invention relates to a printable composition and in particular to a printable composition for application to an electrochromic and/or electrochemical device. The printable electrolyte composition for the production of electrochemical devices comprises: 20-50% by weight, based on the total amount of the composition, of a thermally-curable base which comprises a resin; 20-70% by weight, based on the total amount of the composition, of a solvent; and 10-50% by weight, based on the total amount of the composition, of an electrolyte, wherein the composition has a viscosity of 0.3 Pas or higher.

Electrochemical device

The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.

Security document circuit

A process for rendering an electrically conducting polymer essentially non-conducting is provided, in which the polymer is brought into direct electrical contact with an electrolyte. Furthermore, an electric voltage is applied to the polymer using at least two electrodes connected to a voltage supply, each electrode independently being in electrical contact with one of the polymer and the electrolyte. The electrically conducting polymer is rendered non-conducting through electrochemical reactions occurring in the interface between the polymer and the electrolyte in response to the electric voltage.

Process relating to polymers

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Norrköping, Sweden

Lars-Olov Bror Hennerdal