摘要:
The invention relates to tricyclic aromatics of the general formula I in which A1, A2, A3, A4, Q1-Q2, R1, R2, X1, X2, X3, Z1, Z2, Z3, Z4, q, r, s, t and u have the meaning indicated, and to the use thereof as components of liquid-crystalline media and to an electro-optical display element containing same.
摘要:
The invention relates to bisphenyl thiocompounds of formula (I), wherein X1 to X5 independently represent H, Cl, F, OH, SH, R, —OR and —SR, wherein R is an organic radical with 1 to 18 C atoms, which can be an alkyl or alkenyl radical that can also contain —O—, —S— instead of a one to four non-adjacent CH2 groups and that can be substituted once or multiple times by —OH, —SH or halogen, an unsubstituted phenyl, cyclohexyl or cyclohexylmethyl radical or substituted by one or up to three alkyl groups with a total of 1 to 9 C atoms in which a CH2 group may be replaced by —O—, provided that at least 3 of the radicals X1 to X5 are; Y1 to Y5 independently have the meaning cited for X1 to X5 and Z represents an &agr;, &ohgr;-alkylene group with 2 to 18 C atoms in which one to three CH2 groups may be substituted by —O— or —S— and 1,4-cyclohexandimethyl group or a simple bond. The invention also relates to the use of said compounds as lubricants.
摘要:
Compounds of the formula RG--A--IN wherein IN is a photoinitiator basic structure A is a spacer group and RG is a functional reactive group can be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
摘要:
Compounds of the formulaRG--A--INwhereinIN is a photoinitiator basic structureA is a spacer group andRG is a functional reactive groupcan be employed as coreactive photoinitiators for photopolymerization of systems containing ethylenically unsaturated compounds.
摘要:
Vinyl compounds of the formula I ##STR1## in which the variables are as described in the claims. The compounds are useful as components in liquid-crystalline media.
摘要:
Novel tetrasubstituted methane derivatives of the general formula C[--Sp--M--R].sub.4 in which the radicals --Sp--M--R are the same or different, in which Sp is a spacer group selected from an alkylene or alkenylene radical which is unsubstituted or monosubstituted by halogen, --CN or --CF.sub.3 or one or two non-adjacent CH.sub.2 groups may be replaced by --O--, --CO--, --COO--, --OOC--, --CONH-- or --OCOO--, or is a single bond; R is selected from hydrogen, halogen, --CN, --CF.sub.3, --OCF.sub.3, --NO.sub.2, --N(CH.sub.3).sub.2, an alkyl or alkenyl radical which is unsubstituted or monosubstituted or polysubstituted by --CN, --NH.sub.2, --CF.sub.3 or halogen and in which one or more non-adjacent CH.sub.2 groups may be replaced by the radicals --O--, --CO--, --OOC--, --COO-- or OCOO--; and M is a mesogenic group. Due to their liquid crystal properties, the novel compounds are eminently suitable for use in liquid crystalline media.
摘要:
Compounds of the formula IR.sup.1 --A.sup.1 --Z.sup.1 --A--O--R.sup.2in whichR.sup.1 and R.sup.2, independently of one another, are each alkyl having 1 to 9 C atoms, in which, in addition, one or two CH.sub.2 groups may be replaced by --O--, --CO--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, where two O atoms are not linked directly to one anther, or one of the two groups R.sup.1 and R.sup.2 is alternatively H,Z.sup.1 is --CH.sub.2 --O--, --OCH.sub.2 --, --CH.sub.2 CH.sub.2 -- or a single bond,A.sup.1 is trans-1,4-cyclohexylene in which, in addition one or two nonadjacent CH.sub.2 groups may be replaced by O and/or S, or 1,4-cyclohexenylene, andA is unsubstituted or fluorine-substituted 1,4-phenylene, can be used as components of liquid-crystalline dielectrics containing at least three liquid-crystalline compounds for shortening the switch-on time T.sub.on of electrooptical display elements based on a TN cell on switching the voltage from a first voltage below or approximately at the threshold voltage to a second voltage on the increase of the electrooptical characteristic line.
摘要:
The invention relates to polymerizable liquid-crystal materials and to polymer materials which exhibit liquid-crystal phases and which contain, attached directly or via a spacer, mesogenic groups in which at least one transversely polarizing structural element of the formulae I to X, defined in claim 1, is present.
摘要:
Mustard oils of the formula IR--(A.sup.1 --Z.sup.1).sub.n --A.sup.2 --Z.sup.2 --A.sup.3 --NCSin which A.sup.1, A.sup.2, A.sup.3, R, Z.sup.1, Z.sup.2 and n have the meaning specified in claim 1 can be used as components of liquid-crystalline phases.
摘要:
Articles having a substrate coated with a oriented polymer having polar monomer units wherein the monomer units and main polymer chains originate from cyclic monomers polymerized by ring opening polymerization through impinging light on the coated surface.