摘要:
Fine particles having a thin cholesteric liquid crystal film superior in visibility for a selectively reflected light are provided. Non-liquid crystalline fine particles for nucleus are dispersed in a cholesteric liquid crystal solution, then the solvent used is removed, followed by heat-treatment and cooling, to afford fine particles coated with a thin cholesteric liquid crystal film.
摘要:
A reflection liquid crystal display device comprising a liquid crystal cell where a liquid crystal layer is provided between two opposed electrode substrates, a reflecting layer, and a cholesteric liquid crystal film, characterized in that the ratio (SCE/SCI) of the specular component excluded-refelctance (SCE) to the specular component included-reflectance (SCI) of the cholesteric liquid crystal film is 15% or more, the wavelenght bandwidth of the cholesteric selective reflection ranges from 30 mm to 150 nm, and the center wavelength of the cholesteric selective reflection is in the visible range of 380-780 nm or in the near-infared range of 800-2000 nm.
摘要:
A light-diffusible liquid crystalline film having a fixed cholesteric or chiral smectic C orientation in which the helical axis direction is not uniformly parallel to the film thickness direction, as well as a liquid crystalline film having a fixed cholesteric or chiral smectic C orientation in which the helical axis direction is not uniformly parallel to the film thickness direction nor is the helix pitch uniformly equal in the film thickness direction, are provided.
摘要:
There are provided liquid crystalline polyesters comprising 4'-hydroxy-4-stilbenecarboxylic acid type units, dicarboxylic acid units acting as a mesogen such as 4,4'-stilbenecarboxylic acid and catechol units as essential ingredients, and a liquid crystalline polyester composition comprising said polyesters and optically active liquid crystalline polyesters consisting essentially of 4,4'-stilbenedicarboxylic acid type units and aliphatic diol units having asymmetric carbons.
摘要:
A method for producing a norbornene derivative includes forming a Mannich base represented by any of general formulae (5) to (7) by reacting a carbonyl compound represented by any of general formulae (1) to (3) and an amine compound represented by general formula (4) with each other in an acidic solvent, to thereby obtain a reaction liquid comprising the Mannich base in the acidic solvent, wherein the acidic solvent comprises a formaldehyde derivative and 0.01 mol/L or more of an acid represented by formula HX; reacting the Mannich base and a diene compound represented by general formula (8) with each other by adding an organic solvent, a base in an amount of 1.0 to 20.0 equivalents to the acid, and the diene compound to the reaction liquid, and then heating the reaction liquid, to thereby form the norbornene derivative represented by any of general formulae (9) to (11).
摘要:
A bipolar transistor of the invention has a second base region 116 which is formed in the surface layer of a deep well, placed between a first base region and a sinker, connected to the first base region, has an impurity concentration larger than that of the first base region, and has a depth shallower than that of the first base region; and a buried layer formed in a semiconductor layer, which has the top surface thereof brought into contact with the deep well and the sinker, and has an impurity concentration larger than that of the deep well.
摘要:
A norbornane-2-spiro-α-cycloalkanone-α′-spiro-2″-norbornane-5,5″,6,6″-tetracarboxylic dianhydride represented by the following general formula (1): [in the formula (1), n represents an integer of 0 to 12, and R1s, R2, R3 each independently represents a hydrogen atom or the like].
摘要:
A retardation film, formed by stretching a film comprising a norbornene-based ring-opening copolymer containing a structural unit (A) represented by the following general formula (1): [in the formula (1), n represents an integer of any one of 0 and 1, R1 represents a hydrogen atom or the like, X1 represents a group represented by a formula: —CH═CH— or the like, a and b each independently represent an integer of 0 to 6, Ys each independently represent a methylene group or the like, and Zs each independently represent a methylene group or the like], and a structural unit (B) represented by the following general formula (2): [in the formula (2), m represents an integer of any one of 0 and 1, X2 represents a group represented by a formula: —CH═CH— or the like, and R2, R3, R4, and R5 each independently represent a hydrogen atom or the like], wherein a content of the structural unit (A) is not less than 5 mol % but not more than 95 mol % relative to a total amount of the structural units (A) and (B).
摘要:
A transparent electro-conductive laminate comprising: a substrate film made of a polyimide; and a thin film made of an electro-conductive material and stacked on the substrate film, wherein the polyimide is a polyimide containing at least one repeating unit represented by the following general formula (1): [in the formula (1), R1, R2, and R3 each independently represent one selected from the group consisting of a hydrogen atom, alkyl groups having 1 to 10 carbon atoms, and a fluorine atom, R4 represents an aryl group having 6 to 40 carbon atoms, and n represents an integer of 0 to 12], having a glass transition temperature of 350° C. to 450° C., and having a linear expansion coefficient of 30 ppm/° C. or less, the linear expansion coefficient being determined by measuring change in length under a nitrogen atmosphere and under a condition of a rate of temperature rise of 5° C./minute in a temperature range from 50° C. to 200° C.
摘要:
A reservoir for automotive vehicles comprises first baffles concentrically arranged inside a cap and having different diameters, and second baffles concentrically arranged inside a filler port of the reservoir and having different diameters, the second baffles being concentric with the first baffles. The first and second baffles are disposed alternately. The second baffles are formed with a communication port for allowing fluid communication in the reservoir.