Abstract:
Use of pigments of the formula (I) containing melamine as guest compound and having a dispersion harshness of more than 250 as pigments for colour filters for liquid-crystal displays.
Abstract:
A device in which a triggered switching device (1), for example a contactor, may be maintained in its ON position even if the power supply is interrupted. The invention includes a mechanical locking system having a pawl (11), which is held in a bearing (12). When the switching device (1) is triggered, the pawl (11) engages under the loading of spring force in a recess (5) in a contact carrier (4). It is possible via an unlocking device (7) to actuate an angle lever (16) which pivots the pawl (11) and releases the contact carrier (4). Unlocking can also be performed by hand via an ON-OFF indicator (23) of a second contact carrier (8). The bearing (12) may be shape-coded to ensure that it is installed properly oriented in the openings (13, 14) of the side walls (3, 6) of the switching device (1) and the locking device (7).
Abstract:
A switch device including an inner yoke and an outer yoke are arranged around the winding of an electromagnetic block, and a plate-shaped permanent magnet is inserted between the two yokes. A highly efficient actuation of the switching device is achieved by the assistance of the permanent magnet.
Abstract:
A method for producing a solenoid with a center limb and two outer pole shanks that have one pole surface each and one back resting so that it faces away from it. The back is first at least partially freely formed. The solenoid is then elastically tensioned towards the back by a tensioning device. In the tensioned state, the pole surfaces are ground so that the solenoid, when withdrawn from the tensioning device, has a convex support surface constituted by the pole surfaces.
Abstract:
Metal complexes of metals of the scandium group with an azo compound which conforms to the formula (I) or to one of its tautomeric structures where R is OH, NH2, NH—CN, arylamino or acylamino, R′ is NH2, NH—CN, arylamino or acylamino and R1 and R1′ are independently —OH or —NH2.
Abstract:
The invention concerns a pigment formulation comprising a) at least one metal complex of an azo compound which in the form of its tautomeric structures conforms to the formula (I) where the X and Y rings may independently bear one or two substituents selected from the group consisting of ═O, ═S, ═NR7, —NR6H7, —OR6, —SR6, —COOR6, —CN, —CONR6R7, —SO2R8, alkyl, cycloalkyl, aryl and aralkyl wherein the sum total of the endo- and exocyclic double bonds is three for each of the rings X and Y, R6 represents hydrogen, alkyl, cycloalkyl, aryl or aralkyl, R7 represents hydrogen, cyano, alkyl, cycloalkyl, aryl, aralkyl or acyl, R8 represents alkyl, cycloalkyl, aryl or aralkyl, R1, R2, R3, R4 independently represent hydrogen, alkyl, cycloalkyl, aryl or aralkyl and, as indicated by the broken lines in the formula (I), may combine to form 5- or 6-membered rings to which further rings may be fused, R5 represents —OH, —NR6R7, alkyl, cycloalkyl, aryl or aralkyl, wherein the R1 to R8 substituents that contain CH bonds may in turn be substituted and m, n, o, p denote 1 or else, in the event that, as indicated by the dotted lines in the formula (I), double bonds emanate from the ring-nitrogen atoms, may also denote zero, and which metal complex intercalates at least one other compound, b) if appropriate an iron compound which is other than component a) and whose iron content is less than 30 ppm, preferably less than 20 ppm and especially less than 10 ppm and more preferably in the range from 1 to 5 ppm, based on component a), and c) at least one metal compound whose metal is in each case other than that of the metal compounds of components a) and b) and whose metal content is at least 10 ppm, based on component a), the metal preferably being selected from the group of alkali metals such as Li, Na and K, alkaline earth metals such as Mg, Ca and Ba, lanthanoids such as La, Ce, Pr and Nd and also Al, Sc, Ti, V, Cr, Mn, Co, Cu, Ni and Zn.
Abstract:
Use of pigments of the formula (I) containing melamine as guest compound and having a dispersion harshness of more than 250 as pigments for color filters for liquid-crystal displays.
Abstract:
Process for preparing pigments of the formula (I) or tautomeric structures thereof and their hydrates, containing melamine as guest, characterized in that a mixture of the azobarbituric mono-cation salt (II) and the azobarbituric di-cation salt (III) is reacted with a nickel compound and melamine, in which cation1, cation2 and cation3 independently of one another are any desired univalent cations or the fraction of any desired multivalent cation that corresponds to a positive charge of one.
Abstract:
Process for preparing metal compounds of an azo compound which conforms in the form of its tautomeric structures to the formula (I) characterized in that the preparation takes place in the presence of seed crystals.
Abstract:
Process for preparing metal compounds of an azo compound which conforms in the form of its tautomeric structures to the formula (I) characterized in that an aqueous suspension of a corresponding metal compound is heat-treated in at least two pH stages.