Patent classifications
C09K19/3497
Liquid crystalline composition, side chain type polymer liquid crystalline compound, light absorption anisotropic film, laminate, and image display device
A side chain type polymer liquid crystalline compound with which a light absorption anisotropic film having a high alignment degree can be formed, which includes a liquid crystalline composition, a light absorption anisotropic film which is formed of the liquid crystalline composition, a laminate, and an image display device. A liquid crystalline composition contains a side chain type polymer liquid crystalline compound and a dichroic substance, the side chain type polymer liquid crystalline compound is a copolymer having repeating units 1 and 2, the repeating unit 1 has a mesogenic group and an electron-withdrawing group having a Hammett's substituent constant σp of greater than 0 at a terminal of the mesogenic group, and the repeating unit 2 has a mesogenic group and a group having a Hammett's substituent constant σp of 0 or less at a terminal of the mesogenic group.
OPTICALLY ANISOTROPIC LAYER, OPTICAL FILM, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
Provided is an optically anisotropic layer with which an image display device having suppressed occurrence of oblique light leakage can be manufactured; and an optical film, a polarizing plate, and an image display device, each having the optically anisotropic layer. The optically anisotropic layer is obtained by curing a polymerizable liquid crystal composition including a predetermined rod-like liquid crystal compound and a predetermined monofunctional compound, and immobilizing an alignment state of the rod-like liquid crystal compound, in which a number a1 of atoms of the rod-like liquid crystal compound and a number a2 of atoms of the monofunctional compound satisfy a relationship of Expression (1): 0.2<a2/a1≤0.68, and the rod-like liquid crystal compound is immobilized in a state of being vertically aligned with respect to the main surface of the optically anisotropic layer.
LIQUID CRYSTAL COMPOSITION, LIGHT ABSORPTION ANISOTROPIC FILM, LAMINATE, AND IMAGE DISPLAY DEVICE
Provided is a liquid crystal composition that is capable of forming a light absorption anisotropic film having a high degree of alignment, excellent moisture-heat resistance, and excellent alignment uniformity, a light absorption anisotropic film, a laminate, and an image display device. The liquid crystal composition includes a liquid crystal compound, a first dichroic substance having a structure represented by Formula (1), and a second dichroic substance having a structure represented by Formula (2).
##STR00001##
POLYMERIZABLE LIQUID CRYSTAL COMPOSITION, OPTICALLY ANISOTROPIC LAYER, OPTICAL FILM, POLARIZING PLATE, AND IMAGE DISPLAY DEVICE
Provided is a polymerizable liquid crystal composition capable of suppressing the generation of precipitates; and an optically anisotropic layer, an optical film, a polarizing plate, and an image display device. The polymerizable liquid crystal composition contains a forward wavelength dispersion liquid crystal compound A having an aromatic ring having 10 or more π electrons and a forward wavelength dispersion liquid crystal compound B having an aromatic ring having 6 or more and less than 10 π electrons.
Polymerizable liquid crystal composition and retardation plate
A polymerizable liquid crystal composition containing two polymerizable liquid crystal compounds (A) and (B) is provided. A polymer of compound (A) exhibits a reverse wavelength dispersion property and the phase difference value [R(A,3000,450)] at a wavelength of 450 nm measured after irradiation in an oriented state with ultraviolet ray at 3000 mJ/cm.sup.2 varies in a positive sense relative to the phase difference value [R(A,500,450)] at a wavelength of 450 nm measured after irradiation in an oriented state with ultraviolet ray at 500 mJ/cm.sup.2. A polymer of compound (B) exhibits a reverse wavelength dispersion property and the phase difference value [R(B,3000,450)] at a wavelength of 450 nm measured after irradiation in an oriented state with ultraviolet ray at 3000 mJ/cm.sup.2 varies in a negative sense relative to the phase difference value [R(B,500,450)] at a wavelength of 450 nm measured after irradiation in an oriented state with ultraviolet ray at 500 mJ/cm.sup.2.
POLYMERIZABLE COMPOUND AND OPTICALLY ANISOTROPIC BODY
In light of requests to reduce or reverse the wavelength dispersion of the birefringence of a phase-retardation film in order to increase the viewing angle of a liquid crystal display, the present invention provides a polymerizable compound that reduces, for example, the likelihood of crystals precipitating in a polymerizable composition including the polymerizable compound and enables the polymerizable composition to have high preservation stability and a polymerizable composition including the polymerizable compound which reduces the likelihood of inconsistencies being formed in a film-like polymer produced by polymerizing the polymerizable composition. Another object of the present invention is to provide a polymer produced by polymerizing the polymerizable composition and an optically anisotropic body including the polymer.
POLYMERIZABLE COMPOSITION AND OPTICALLY ANISOTROPIC BODY USING SAME
The polymerizable composition contains: a) a polymerizable compound having one or two or more polymerizable groups and satisfying formula (I):
Re(450 nm)/Re(550 nm)<1.0 (I);
b) at least one photopolymerization initiator selected from the group consisting of alkylphenone-based compounds, acylphosphine oxide-based compounds, and oxime ester-based compounds; and c) a polymerization inhibitor. The present invention also provides an optically anisotropic body, a retardation film, an antireflective film, and a liquid crystal display device that are produced using the polymerizable liquid crystal composition. The polymerizable composition of the present invention is excellent in solubility and has high storage stability, so that no precipitation of crystals etc. occurs. When a film-shaped polymer is produced by polymerizing the above composition, the unevenness of the surface of the coating film is small while the alignment of the liquid crystal is maintained, and high durability is obtained. Therefore, the polymerizable composition is useful.
Polymerizable liquid crystal compound, polymerizable composition, polymer, retardation film, method for producing retardation film, transfer laminate, optical member, method for producing optical member, and display device
A polymerizable liquid crystal compound represented by the following general formula (1): ##STR00001##
(the symbols in the general formula (1) are as described in the DESCRIPTION.)
Polymerizable liquid crystal
The invention relates to novel anisotropic compounds of formula ##STR00001##
as well as to liquid crystalline mixtures, films and electro-optical devices comprising the compound.
HORIZONTALLY ORIENTED LIQUID CRYSTAL CURED FILM AND LAMINATE INCLUDING THE SAME
A laminate including a horizontally oriented liquid crystal cured film that is a cured material of a polymerizable liquid crystal composition containing at least one type of polymerizable liquid crystal compound, and a vertically oriented liquid crystal cured film is provided. The horizontally oriented liquid crystal cured film is the cured material of the polymerizable liquid crystal composition in which the polymerizable liquid crystal compound is cured in a state of being horizontally oriented with respect to a plane of the liquid crystal cured film, and satisfies the following formulae: nxA(450)>nyA(450)>nzA(450) and ReA(450)/ReA(550)<1.00.