Patent
Electrochromic marking systems
TLDR
In this article, the color formers are prepared by the interaction of the corresponding 5-(N-R1 -amino)-9-(NR2 -N-r3 -aminosinium halide) or 9-(n-R2-n-r-3-amino)phenoxazin-5-one with a reducing agent and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.Abstract:
5-[N-(RCO)-N-R1 -amino] or (RCOO)-9-(N-R2 -N-R3 -amino)-12-(RCO)benzo[a]phenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 5-(N-R1 -amino)-9-(N-R2 -N-R3 -amino)benzo[a]phenoxazinium halide or 9-(N-R2 -N-R3 -amino)benzo[a]phenoxazin-5-one with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.read more
Citations
More filters
Patent
Compounds for electronic devices
TL;DR: In this paper, the present invention relates to compounds of the formula (I) and to the use thereof in organic electronic devices, and to organic devices which comprise compounds of I, preferably as holetransport materials and/or as matrix materials, in particular in combination with a further matrix material.
Patent
Method for reducing current leakage and enhancing uv stability in electrochemichromic solutions and devices
TL;DR: In this paper, a method for reducing current leakage and enhancing UV stability by using electrochemichromic solutions whose solvents include glutaronitrile (GNT) either solely or in combination with other solvers, was described.
Patent
Method of reducing leakage current in electrochemichromic solutions and solutions based thereon
TL;DR: In this article, the authors describe electrochemichromic solutions and devices based on the use of from about 5% by volume of a nonpolymeric material having a high volume resistivity and high dielectric constant to reduce leakage current without unduly increasing solution viscosity.
Patent
High performance electrochemichromic solutions and devices thereof
TL;DR: In this article, the specification discloses electrochemichromic solutions and devices based on the use of solvents comprising at least about 25% 3-hydroxypropionitrile, 3,3'-oxydipropionitriles, 2-acetylbutyrolactone, 2 -methylglutaronitrile and 3-methylsulfolane and mixtures thereof.
Patent
Electrochemichromic solutions, processes for preparing and using the same, and devices manufactured with the same
TL;DR: In this paper, a method for pre-treating at least one of the electrochemichromic compounds with a redox agent prior to placing it in contact with the other is presented.
References
More filters
Patent
Pressure sensitive copying paper
TL;DR: A pressure sensitive copying paper is prepared using a color former of the general formula whereIN R1 and R2 each represent an alkyl group having 1 to 5 carbon atoms or a benzyl group, and X1, X2, X3 and X4 each represent a hydrogen atom, a halogen atom, an alkoxyl group or a methyl group as mentioned in this paper.
Patent
Electrochromic recording paper
TL;DR: A medium for electrochromic recording is provided by treating paper with a water soluble leuco methylene blue compound having the formula ##STR1## wherein R is a sulfonated aromatic or sulfonate aliphatic moiety as mentioned in this paper.
Patent
Pressure-sensitive copying paper containing phenoxazine compounds
TL;DR: A pressure sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adorbent acid coated on the same or a different surface of a support or supports is defined in this paper.
Journal ArticleDOI
Polymer induced aggregation of dye molecules. Influence of the attachment of dye molecules as side groups
TL;DR: By radical polymerization, 7-(N-acryloyl-N-methyl)-3-dimethyliminio-3H-phenothiazine chloride (1) has been transformed in the N-substituted polyacrylamide carrying Azure B side groups, poly{1]-N-(3dimethylmethyl-7-yl)-N-methylaminocarbonyl]ethylene chloride.
Patent
Compound and pigment having halogen-containing active group
TL;DR: In this article, a compound having halogen-containing active group of formula I is presented. But the compound of formula III is not shown to have a halogen active group.