Abstract:
Mixtures have been found comprising at least one red dye of the formula (I), (C) or (CI) and at least one orange dye of the formula (L), (LI), (LII), (LIII), (LIV) or (LV) where the substituents have the definition in the description, these mixtures being suitable more particularly for the mass colouring of plastics.
Abstract:
Optical data carriers having at least one information layer which comprises a polymeric network comprising covalently bound light-absorbent compounds.
Abstract:
The present invention relates to a singly recordable optical data medium using Co-phthalocyanine complexes of the formula (I) in which the groups are defined herein, as light-absorbing compounds in the information layer of optical data media, in which information layer is recordable using light, particularly for CD-R, and the application of the above-mentioned compounds to a polymer substrate, particularly polycarbonate, by spin coating.
Abstract:
The invention relates to an electrochromic device having (a) a pair of glass or plastic plates or plastic films wherein at least one such plate or film is provided on one side each with an electrically conductive coating, wherein (1) at least one such plate or film and its conductive coating is transparent, (2) the other such plate or film and its conductive coating is optionally mirrored, (3) the electrically conductive layer of one or both of the two plates or films is optionally divided into separate segments optionally provided with individual contacts, and (4) the plates or films are joined on the sides of their conductive coating by means of a sealing ring to form a volume; and (b) the volume formed by the two plates or films and the sealing ring is filled with an electrochromic medium containing certain dihydronaphthazines or dihydrophenazines.
Abstract:
This invention relates to UV-protected electrochromic solutions suitable for use in electrochromic devices and containing at least one oxidizable substance RED1 and at least one reducible substance OX2 linked by a bridging group and a UV absorber component.
Abstract:
In the novel electrochromic system comprising at least one oxidizable substance RED1 and at least one reducible substance OX2, each of which, accompanied by an increase in the absorbance in the visible region of the spectrum, is converted from a weakly colored or colorless form into a colored form wherein the reciprocal conversion of oxidized and reducible form takes place by a &sgr; bond being broken or formed, respectively.
Abstract:
The novel electrochromic system comprises at least one reducible and at least one oxidizable substance OX2 and RED1 respectively, which are linked with one another via a bridge member, and is outstandingly suitable for use in an electrochromic device.
Abstract:
Electrochromic display devices, whose plates having conductive coatings are subdivided into segments which are electrically separated from one another, can be contacted individually and, between the plates, contain a solvent, specific electrochromic substances and optionally conductive salts, are distinguished by excellent edge definition and high contrast.