A polymerizable LC material comprising one or more reactive mesogenic compounds, one or more chiral compounds and a block copolymer that comprises at least one polyfluorooxetane block bonded to a polyether block, said polyfluorooxetane block having a repeating unit of the formula

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Further, a method for its preparation, a polymer film obtainable from a corresponding polymerizable LC material, a method of preparation of such polymer film, and the use of such polymer film and said polymerizable LC material in optical, electro-optical, decorative or security devices.

Glycine betaine based liquid crystal comprising in dry matter at least: 80 to 99.5% by weight of glycine betaine, and 0.5 to 20% by weight of a non-ionic water soluble tensioactive system having a HLB value equal to 12 or more than 12,
whereby the weight ratio glycine betaine/non-ionic water soluble tensioactive system is greater than 10,
said glycine betaine and said non-ionic water soluble tensioactive being solubilized in water for forming the glycine betaine based liquid crystal.

Polymerizable compounds, to processes and intermediates for the preparation thereof, liquid-crystal (LC) media comprising them, and the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type, or a stabilizers in LC media and LC displays.

The present invention relates to an LC medium comprising and a liquid-crystalline host consisting of an LC component H) comprising one or more mesogenic or liquid-crystalline compounds and an optically active component D) and optionally a polymerizable component P) comprising one or more polymerizable compounds; and to the use of the polymerizable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the polymer sustained alignment type.

The present invention relates to liquid-crystal (LC) media as defined in claim 1, having negative dielectric anisotropy and to the use thereof for optical, electro-optical and electronic purposes, in particular in LC displays.

Proposed is a dielectric material of a liquid-crystal polymer composition including a low-dielectric and high-heat-dissipating liquid-crystal-material monomer for a millimeter wave band and a polymer thereof, and more particularly, a liquid-crystal polymer composition including a low-dielectric and high-heat-dissipating liquid-crystal-material monomer for a millimeter wave band and a polymer thereof, the liquid-crystal-material monomer including a mesogen core, a silane-based group, and a polymerization reactive group.

A liquid crystal display device includes, in sequence, a backlight, a first substrate including a color filter layer, a liquid crystal layer containing a liquid crystal composition, and a second substrate. The liquid crystal composition contains a liquid crystal compound having a phenyl group and a conjugated bond group. The phenyl group has a halogen atom substituted for at least one hydrogen atom. The conjugated bond group is conjugated with the phenyl group to form a continuous conjugated system.

A porous liquid crystal polymer sheet that includes: a resin sheet having pores and containing a first component composed of a liquid crystal polymer and a second component accounting for a highest weight percentage of the resin sheet except for the first component, wherein, when a region containing the second component is defined as a first region, and a region having a smaller content of the second component than the first region is defined as a second region in the porous liquid crystal polymer sheet, the first region has higher compressive strength than the second region, the second component has an average particle size smaller than an average pore size of the pores, and the second component is not in contact with an inside of the pores.

A porous liquid crystal polymer sheet that includes a resin sheet containing a liquid crystal polymer and having pores. The porous liquid crystal polymer sheet has a melt viscosity of 20 Pa.Math.s or more under the conditions of a shear rate of 1000 s.sup.−1 and a measurement temperature that is 20° C. higher than a melting point of the resin sheet.

The present invention provides a compound represented by formula (i), a liquid crystal composition using the compound, and a liquid crystal display device using the liquid crystal composition. The compound represented by formula (i) has a partial structure K.sup.i1 represented by any of general formulas (K-1) to (K-17) and further has ring B having at least two P-Sp- groups. Therefore, when used for a liquid crystal composition, the compound adsorbs to substrates sandwiching the liquid crystal composition (liquid crystal layer) and allows liquid crystal molecules to be held such that they are aligned in a vertical direction without a PI layer, and improved alignment stability and low-temperature storage stability can be achieved.