摘要:
A process for preparing substituted biphenyls in which R1=nitro, amino or NHR3, R2=CN, NO2, halogen, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, C1-C6-alkoxy, C1-C6-haloalkyl, C1-C6-alkylcarbonyl or phenyl, R3=C1-C4-alkyl, C2-C4-alkenyl or C2-C4-alkynyl, m=1 or 2; n=0 to 3, which comprises reacting a compound II in the presence of a base and of a palladium catalyst selected from the group of: a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium applied to support if appropriate, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III)
摘要翻译:制备其中R1 =硝基,氨基或NHR3,R2 = CN,NO2,卤素,C1-C6-烷基,C2-C6-烯基,C2-C6-炔基,C1-C6-烷氧基,C1- C 1 -C 6烷基羰基或苯基,R 3 = C 1 -C 4烷基,C 2 -C 4 - 烯基或C 2 -C 4炔基,m = 1或2; n = 0至3,其包括使化合物II在碱的存在下与选自以下的钯催化剂反应:a)钯 - 三芳基膦或三烷基膦配合物与零氧化状态的钯,b) 在三芳基膦或三烷基膦存在下作为络合配体的钯,或c)在溶剂中,在二苯基硼酸(III)中,在三芳基膦或三烷基膦存在下,适当地加入金属钯,
摘要:
A process for preparing substituted biphenyls in whichR1=nitro, amino or NHR3,R2=CN, NO2, halogen, C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, C1-C6-alkoxy, C1-C6-haloalkyl, C1-C6-alkylcarbonyl or phenyl,R3=C1-C4-alkyl, C2-C4-alkenyl or C2-C4-alkynyl,m=1 or 2; n=0 to 3,which comprises reacting a compound II in the presence of a base and of a palladium catalyst selected from the group of: a) palladium-triarylphosphine or -trialkylphosphine complex with palladium in the zero oxidation state, b) salt of palladium in the presence of triarylphospine or trialkylphosphine as a complex ligand or c) metallic palladium applied to support if appropriate, in the presence of triarylphosphine or trialkylphosphine, in a solvent, with a diphenylborinic acid (III)
摘要:
A process is described for preparing 3-trifluoromethylphenyl 4-cyanobenzyl ketone by reacting a C1–C2-alkyl 3-trifluoromethylbenzoate with 4-tolunitrile in an aprotic polar solvent or an aprotic polar solvent mixture in the presence of at least an equimolar amount of a base which is selected from potassium alkoxides of primary C1–C4-alkanols.
摘要:
A DC-DC converter having a primary side comprising at least three actively switched primary voltage bridges with several active switches for converting a DC input voltage into primary alternating voltages for each of the primary voltage bridges, and having a secondary side comprising at least three actively switched secondary voltage bridges with several active switches for converting the secondary alternating voltages into a shared DC output voltage for each of the secondary voltage bridges. The primary and secondary alternating voltages are each shifted by a phase angle φ with the periods T, and each of the primary and secondary voltage bridges is coupled to an appertaining phase via one or more transformers.
摘要:
The present disclosure is directed to a pigment preparation comprising aluminum effect pigments, a solvent and at least one additive, wherein the aluminum effect pigments have a d98 value of the volume averaged particle size distribution curve of less than 15 μm, the at least one additive is a phosphorous containing additive, and the solvent has a viscosity equal to or more than 1.8 mPa's at 25° C. The disclosure is further directed to an ink jet printing ink as well the use thereof.
摘要:
The invention relates to a process for preparing semicarbazone compounds of the formula I, where R1 and R2 are each independently hydrogen, halogen, CN, C1-C4-alkyl, C1-C4-alkoxy, C1-C4-haloalkyl or C1-C4-haloalkoxy, and R3 is C1-C4-alkoxy, C1-C4-haloalkyl or C1-C4-haloalkoxy, by reacting a hydrazone compound of the general formula II, where R is C1-C4-alkoxy, amino, C1-C4-alkylamino or di(C1-C4-alkyl)amino, and R1, R2 are each as defined above, with an aniline compound of the general formula III where R3 is as defined above.
摘要:
A pigmented ink for printing on untreated vinyl foils or substrates coated with vinyl by means of piezoelectric printing systems which include at least one heating device, wherein the ink is composed of a liquid carrier substance, water insoluble coloring agents, polymeric binding agents, drying decelerators, as well as additional additives, wherein the liquid carrier substance is composed of water and drying decelerators which are mixable in water. The liquid carrier substance has a content of at least 80% by weight water and the content of drying decelerators is composed of at least butyldiglycol and 1-metaxipropanol-2, and the ink has a pH-value of greater than 8.5.
摘要:
A method for cleaning the printhead of an ink jet printer includes the steps of separating an ink container from the printhead, connecting a cleaning container containing cleaning fluid to the printhead, and drawing cleaning fluid through the printhead, thereby cleaning the printhead. A device for cleaning the printhead includes a cleaning container connector element and a cleaning container that are shaped substantially the same as an ink container connecting element and an ink container, respectively.
摘要:
A DC-DC converter having a primary side comprising at least three actively switched primary voltage bridges with several active switches for converting a DC input voltage into primary alternating voltages for each of the primary voltage bridges, and having a secondary side comprising at least three actively switched secondary voltage bridges with several active switches for converting the secondary alternating voltages into a shared DC output voltage for each of the secondary voltage bridges. The primary and secondary alternating voltages are each shifted by a phase angle φ with the periods T, and each of the primary and secondary voltage bridges is coupled to an appertaining phase via one or more transformers.
摘要:
A printing ink, preferably ink-jet ink, containing pearlescent pigments and at least one of at least one solvent, at least one radiation-curable component and at least one binder, wherein the pearlescent pigments comprise a substantially transparent platelet-shaped substrate having a density ρS and at least one optically active coating having a density ρM, and the pearlescent pigments have a d90 value for a cumulative frequency distribution of a volume-averaged size distribution function with a range from 3.5 to 15 μm. The invention further relates to a process for producing the printing ink.