PROCESSO PARA A PREPARACAO DE CICLO-HEXILFENILPIRIMIDINAS PARA UTILIZACAO EM MISTURAS DE CRISTAIS LIQUIDOS E VISUALIZADORES DE CRISTAIS LIQUIDOS

• Main Authors: GERD ILLIAN, INGRID MULLER, RAINER WINGEN
• Format: Patent
• Language: Portuguese
• Published: 31.08.1992
• Edition: 5
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC CHEMISTRY; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Cyclohexylphenylpyrimidines of the formula (I) anched, chiral or achiral alkyl or alkenyl having 2 to 16 carbon atoms, in which one or two nonadjacent -CH2- groups may be replaced by -0-, -S-, -CO-, -COO-, -OCO-, -Si(CH3)2- or -C(CH3)2-, and in which one or more hydrogen atoms of the alkyl or alkenyl radical may be replaced by fluorine atoms, and in which the terminal CH3 group of the alkyl may also be replaced by R2 is straight-chain or branched, chiral or achiral alkyl having 1 to 10 carbon atoms, are particularly suitable components for ferroelectric liquid-crystal mixtures since they result in favorable properties, such as, for example, high contrast, when used in electrooptical switching and display devices.