Abstract:
PROBLEM TO BE SOLVED: To obtain a new compound useful as an agent of dope with a high torsional strength for a cholesteric liquid crystal and capable of shifting a reflected wave length of a cholesteric compound into the visible spectrum by using an extremely slight amount thereof. SOLUTION: This compound is shown by formula I [a group A is a spacer e.g. (CH2 )p ((P) is 1 to 12) or (CH2 CH2 O)q CH2 CH2 ((q) is 1 to 3); M is a mesogenic group having 2 phenylenes bound to each other through e.g. O, CO or OCO and unsubstituted or substituted with e.g. an 1-4C alkyl or methoxy group; Y is a polymerizable group e.g. a direct bond O, S; (m) is 0 or 1; (n) is 2 to 6; and X is a chiral group e.g. of formula II], e.g. a compound of formula III obtained by reacting bis(4'-hydroxylbenzoyl)-1,4:3,6-dianhydrosobbitol with 4-acryloxybutyloxycarbonyloxybenoyl chloride. A compound of formula I is pref. used in the copolymerized form with a known nematic compound.
Abstract:
PROBLEM TO BE SOLVED: To obtain a new liquid crystal compound useful as printed product, coated product, liquid crystal coloring agent, aqueous emulsion, aqueous dispersion, pigment, and so on, all of which have liquid crystal order state in the products. SOLUTION: The compound shown by formula I (P and P are each H, a 1-4C alkyl, or a reactive group capable of causing polymerization; Y and Y are each single bond such as O, S, and OCO; A and A are each a 1-30C spacer whose carbon chain can be intermitted with oxygen in the form of an ether bond or with sulfur in the form of a thioether bond; M is a mesogen) (e.g. formula II) is obtained by reacting at least one compound shown by the formula; HO-M-OH [M is a mesogen shown by formula III (T is a bivalent homocyclic or heterocyclic group; Y is a single bond such as O, S, and OCO; (r) is 0-3) or a mesogen shown by formula IV (ring Z is H, a 1-20C alkyl, a 1-20C alkoxy, a 1-20C alkoxycarbonyl, or the like] with at least one compound shown by formula V or VI (Y is an eliminable).
Abstract:
The process for coating or printing substrates with a coating or printing agent is characterized by the application to the substrate of a polymerizable substance containing liquid crystal, polymerizable monomers which for coating carry at least two polymerizable groups and for printing carry at least one polymerizable group, followed by polymerization, wherein the coating or printing agent contains a1) a chiral liquid crystal monomer and b) a polymer binder and/or monomer compounds that can be converted into the polymer binder by polymerization or, in the case of dispersion coatings and printing inks, a dispersing aid d), or the coating or printing agent contains a2) an achiral liquid crystal monomer, b) a polymer binder and/or monomer compounds that can be converted into the polymer binder by polymerization or, in the case of dispersion coatings and printing inks, a dispersing aid d), and c) a chiral compound that is not a liquid crystal.
Abstract:
The invention concerns polymerizable liquid-crystalline compounds of the general formula (I) Z -Y -A -Y -M-Y -A -Y -Z in which the variables have the following meanings: Z , Z are radicals with reactive groups which can bring about polymerization; Y - Y are a chemical single bond, oxygen, sulphur, -O-CO-, -CO-O-, -O-CO-O-, -CO-NR-, -NR-CO-, -O-CO-NR-, -NR-CO-O- or -NR-CO-NR-, at least one of the groups Y and Y meaning -O-CO-O-, -O-CO-NR-, -NR-CO-O- or -NR-CO-NR-; A , A are C2-C30 spacers in which the carbon chain can be interrupted by oxygen in the ether function, sulphur in the thioetherfunction or by non-adjacent imino or C1-C4 alkylimino groups; M is a mesogenic group; and R is C1-C4 alkyl. The compounds and compositions containing them are distinguished by advantageous liquid-crystalline phase temperature ranges and can be used in optical display units and cholesteric liquid-crystalline colouring agents.
Abstract:
Die Erfindung betrifft die Verwendung von organischen Materialien mit einer spezifischen Leitfähigkeit kleiner 10 -2 S/cm und mit einer nichtionischen Ladungsträgerbeweglichkeit von größer als 10 -4 cm 2 /Vs als Ladungstransportmedium, mit der Maßgabe, daß in diesem organischen Material durch Lichtabsorption keine Erhöhung der Ladungsträgerkonzentration um den Faktor 10 oder mehr herbeigeführt wird, sowie entsprechende elektrochemische Zellen.
Abstract:
The invention relates to a heat-insulating coating which comprises one or more cholesteric IR-reflecting layers and to processes for its preparation and to its use.
Abstract:
New polymerizable liquid crystalline compounds with two disubstituted phenyl groups attached to a mesogenic group via single bonds, ether, thioether, ester, amide or similar linking groups, in which the two substituents on each phenyl group are crosslinkable groups. Polymerizable liquid crystalline (LC) compounds of formula (I) are new. A , A = crosslinkable groups; X = a single bond, -O-, -S-, -C=N-, -OCO-, -COO-, -OCOO-, -CONR-, -NRCO-, -NR-, -OCONR-, -NRCOO-, -CH2O- or -NRCONR-; R = H or 1-4C alkyl; and M = a mesogenic group. Independent claims are also included for the following: (a) A method for the production of (I) by reacting a compound of formula (III) with a mesogenic compound of formula X''-M-X'' (IV). X', X'' = reactive side-groups which combine to form group X. (b) Compositions containing (I) and optionally other components selected from cholesteric (optionally crosslinkable) compounds, inorganic pigments, coloring agents and optionally polymerizable diluents or supports. (c) Pigments containing (I) in crosslinked form. (d) Coating materials containing such compositions or pigments.
Abstract:
The present invention relates to novel cholesteric layered materials having the layer sequence A /B/A , where A and A are identical or different and each comprise at least one cholesteric layer, and B is at least one interlayer separating the layers A and A from one another, wherein layer B is an adhesive layer; cholesteric multilayered pigments which can be produced therefrom; a process for their production, and their use.
Abstract:
Liquid crystal compositions forming a cholesteric phase with a pitch of less than 450 nm, comprising either at least one polymerizable chiral liquid crystal monomer or a mixture of at least one polymerizable achiral liquid crystal monomer and at least one chiral additive, are used as ultraviolet filters for protecting skin or hair against solar radiation. Liquid crystal compositions forming a cholesteric phase with a pitch of less than 450 nm, comprising either: (a) at least one polymerizable chiral liquid crystal monomer of formula (I); or (b) a mixture of at least one polymerizable achiral liquid crystal monomer of formula (II) and at least one chiral additive, are used as ultraviolet (UV) filters in cosmetic and pharmaceutical compositions for protecting human skin or hair against solar radiation: A -A = spacers with a chain length of 1-30C; Y -Y = bonds, O, S, C(O)O, OC(O), CH=CHC(O)O, OC(O)O, C(O)N(R), N(R)C(O), CH2O, OCH2, CH=N, N=CH or N=N; M , M = mesogenic groups; R = H or 1-4C alkyl; Z = H, 1-4C alkyl or a polymerizable group, at least one being a polymerizable group; Z , Z = H, 1-4C alkyl or polymerizable groups, at least one being a polymerizable group; X = an n-valent chiral group; m, o, p = 0 or 1; n = 1-6. Independent claims are also included: (1) use of the liquid crystal compositions as photostable UV reflectors; (2) use of the liquid crystal compositions as UV stabilizers in cosmetic and pharmaceutical formulations; (3) pigments containing the polymerized liquid crystal compositions.