Abstract:
A cement admixture which can combine the flowability of a fresh concrete with a high strength of a hardened concrete; and a concrete containing the same. The admixture comprises a mixture of a fluorine compound represented by the general formula (1): R -Q -O-(A -O)k-R and having a weight-average molecular weight (Mw) to number-average molecular weight (Mn) ratio (Mw/Mn) of 1.1 or higher wherein R represents C1-22 aliphatic polyfluorohydrocarbyl optionally containing ethereal oxygen or thioethereal sulfur, Q represents C1-5 linear or branched alkylene, k is an integer of 1 to 100, A represents C2-4 linear alkylene, wherein at least one hydrogen atom may have been replaced with a hydrocarbon group optionally containing ethereal oxygen, provided that when k is 2 to 100, the A 's may be the same or different, and R represents hydrogen, C1-18 hydrocarbyl, or C1-18 acyl.
Abstract:
Fluorinated organosilicon compounds of general formula (1), useful as water- and oil-repellent and other various industrial materials required to exhibit stain resistance, mold release properties or various other performances, or as raw materials thereof. In the general formula (1), A is a specific organic group having a polyfluorohydrocarbon group; R and R are each independently a divalent organic group; R to R are each independently a monovalent organic group; a is an integer of 1 or above; and b is an integer of 0 or above.
Abstract translation:作为防水防油剂和其它各种工业用材料,具有抗污染性,脱模性,各种其他性能的通式(1)的氟化有机硅化合物或其原料。 在通式(1)中,A 是具有多氟烃基的特定的有机基团; R 1和R 2各自独立地为二价有机基团; R 3至R 9各自独立地为一价有机基团; a为1以上的整数; b为0以上的整数。
Abstract:
A method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, of which at least the surface is made of carbon, a cathode compartment provided with a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment, and carrying out electrolytic oxidation to obtain polysulfide ions.
Abstract:
An optically anisotropic diffraction grating for an optical read/write head, comprising optically isotropic polymer liquid crystal held between two transparent base plates. Gratings of different refractive indexes are formed by periodically changing the orientation of the polymer liquid crystal of the diffraction grating. This enables a high light-utilization efficiency and a high reliability to be obtained.
Abstract:
A surface-treated PFA film having hydroxyl groups and carbonyl groups on the surface, wherein the treated surface is free from unevenness and preferably has an average surface roughness of 10 nm or below and the surface treatment is conducted by RF or DC bombardment preferably in an argon atmosphere.
Abstract:
A glass suitable for vehicles, substantially comprising the following components and having a density of 2.45 g/cc or below at room temperature: SiO2 74 to 83 (% by weight), B2O3 0 to 5(% by weight), MgO 0 to 10 (% by weight), CaO 0 to 10 (% by weight), ZnO 0 to 10 (% by weight), Na2O + K2O + Li2O 6 to 23 (% by weight), Al2O3 0 to 5 (% by weight).
Abstract translation:适用于车辆的玻璃,基本上包含以下组分,并且在室温下的密度为2.45g / cc或更低:SiO 2 74至83(重量%),B 2 O 3至5(重量%),MgO 0至10 (重量%),CaO 0〜10(重量%),ZnO 0〜10(重量%),Na 2 O + K 2 O + Li 2 O 6〜23(重量%),Al 2 O 3〜5(重量%)。
Abstract:
A scratch-resistant glass essentially comprising the following components and having a density of 2.41 g/cc or less as determined at room temperature: SiO2 75.5 - 85.5 (wt.%), RO 1 - 8 (wt.%), R'2O 10 - 23.5 (wt.%), RO+R'2O 11 - 24.5 (wt.%), A12O3 0 - 5 (wt.%), RO/R'2O (by wt.) 0.5 or less, wherein R represents at least one of Mg and Ca; R' represents at least one of Li, Na and K.
Abstract:
A secretory signal gene which comprises a base sequence encoding a polypeptide capable of serving as a secretory signal in a fission yeast Schizosaccharomyces pombe; an expression vector having this gene and a heterogenous protein structural gene; a multicloning vector having the above secretory signal gene and being useful in the construction of the above expression vector; and the secretory production of this heterogenous protein structural gene product at a high efficiency in S. pombe, etc.
Abstract:
A color liquid crystal display device has a liquid crystal layer (3) of a nematic liquid crystal having positive dielectric anisotropy and including a chiral material, which is interposed between two substrates disposed substantially in parallel to each other, each provided with a transparent electrode and an aligning layer wherein the twist angle of the liquid crystal layer by the orientation of liquid crystal molecules determined by the aligning layer of each of the substrates is 160 DEG -300 DEG ; a pair of polarizing plates (1, 2) disposed outside the liquid crystal layer (3), and a driving circuit for applying a driving voltage across the transparent electrodes, wherein a birefringent plate (4) is disposed between the liquid crystal layer and an upper polarizing plate (1) and the product DELTA n1.d1 of the refractive index anisotropy DELTA n1 of the liquid crystal in the liquid crystal layer (3) and the thickness d1 of the liquid crystal layer is 1.2 mu m-2.5 mu m; the birefringent plate (4) is so formed as to have a relation of nx>/=nz>/=ny wherein nx and ny respectively represent the refractive index (nx>ny) in the direction of film plane of the birefringent plate, and nz represents the refractive index in the direction of thickness of the birefringent plate (except for a case of nx=nz=ny); the birefringent plate have the sum DELTA n2.d2 of the refractive index anisotropy between a slow axis (a direction of nx in the film plane) and a fast axis (a direction of ny in the film plane), and the birefringence in the vertical direction corresponding to the thickness is 1.2 mu m-2.5 mu m; at least three kinds of voltage values are selected so as to be applied across the transparent electrodes by multiplexing driving; and development of color of white is effected by applying an OFF voltage.
Abstract:
A porous ion exchanger which has a porous structure having ion exchange resin particles bound by a binder polymer, and which has a water permeability of at least 30 kg.cm .hr under a pressure of 0.35 kg/cm .