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 ##STR00001## 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.

Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.

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

##STR00001##

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.

The invention relates to novel compositions comprising at least two anisotropic compounds of formula

##STR00001##

as well as to liquid crystalline networks, films and electro-optical devices comprising the compositions.

A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.

A polymer having excellent liquid crystal alignment and electrical properties and thus is suitable for use as a liquid crystal alignment agent, a liquid crystal alignment agent including the same, a liquid crystal alignment film formed from the liquid crystal alignment agent, and a liquid crystal display device including the liquid crystal alignment film are provided.

A liquid crystal composite that contains a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, large optical anisotropy and large positive dielectric anisotropy, and that is suitable for dimming, or having a suitable balance regarding at least two of the characteristics; and a liquid crystal dimming device having the liquid crystal composite. The liquid crystal composite contains a polymer and a liquid crystal composition containing a specific compound having large positive dielectric anisotropy. The liquid crystal composite may further contain a specific compound having high maximum temperature or low minimum temperature; or a specific compound having large negative dielectric anisotropy.

In a mixture, a content of a polymerizable compound (I) represented by the following Formula (I) is more than 0.2 times a content of a polymerizable compound (II) represented by the following Formula (II), where Ar.sup.1 and Ar.sup.2 are a predetermined ring group, A.sup.1 to A.sup.4 and B.sup.1 to B.sup.4 are a cyclic aliphatic group or an aromatic group that may have a substituent, Z.sup.1 to Z.sup.4, Y.sup.1 to Y.sup.4, and L.sup.1 to L.sup.4 are a predetermined group such as O, C(O)O, or OC(O), R.sup.1 to R.sup.6 are a hydrogen atom, a methyl group, or a chlorine atom, one of e and f is an integer of 1 to 3 and the other one of e and f is an integer of 0 to 3, c, d, i, and j are an integer of 1 to 20, and a, b, g, and h are 0 or 1,

##STR00001##

The invention relates to a liquid-crystalline medium which comprises at least one compound of the formula I, ##STR00001## in which R.sup.1 and R.sup.1* each, independently of one another, denote an alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH.sub.2 groups in these radicals may each be replaced, independently of one another, by ##STR00002##
in such a way that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen, A.sup.1 denotes ##STR00003## L.sup.1 denotes F, Cl, CF.sub.3, OCF.sub.3 or CHF.sub.2,
and to the use thereof for electro-optical purposes, in particular for shutter glasses, 3D applications, in TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, PS-FFS and PS-VA-IPS displays.

Provided are a liquid crystal composition, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device, each of which suppresses streak defects and has excellent temporal stability. The liquid crystal composition includes a liquid crystal compound and a basic compound, in which a pKa of a conjugate acid of the basic compound is 4 to 10.