Abstract: A method for producing (meth)acrylic acid relevant to the present invention has the step for producing (meth)acrylic acid-containing gas by subjecting raw material gas to a catalytic vapor phase oxidation reaction in a reactor for catalytic vapor phase oxidation; and the step for obtaining a (meth)acrylic acid solution by introducing (meth)acrylic acid-containing gas thus produced to an absorption tower and separating non-condensable gas from (meth)acrylic acid-containing gas, and it is an object to provide a method for obtaining a high concentration acrylic acid solution stably by controlling temperature of (meth)acrylic acid-containing gas just before being supplied to the absorption tower, regardless of temperature fluctuation of gas discharged from the reactor for catalytic vapor phase oxidation.

Abstract: An object of the present invention is to provide a waste solution solidifying agent which can solidify a waste solution, particularly, a waste solution containing blood or body fluid at a low cost, uniformly, and in a short time; in particular, to provide a waste solution solidifying agent which can solidify a waste solution uniformly and in a short time in a vertically oriented waste solution equipment. As a means of achieving this object, a waste solution solidifying agent of the present invention is a particulate treating agent used in a method of treating a waste solution which solidifies a waste solution into a gel by placing a treating agent in a waste solution, and is characterized in that said agent contains, as an essential component, a water-absorbent resin having a crosslinked structure obtained by polymerizing a water-soluble ethylenic unsaturated monomer and, when flowing-placed at once into a 0.

Abstract: Aqueous liquid and moisture vapor are added to water absorbent resin powder so that particles of the water absorbent resin powder are bound. Supplying the aqueous liquid and moisture vapor to the water absorbent resin powder reduces the amount of particles that remain unbound (ungranulated) and increases the concentration of the water absorbent resin bound particles to provide improved drying efficiency and to obtain particulate water absorbent resin having excellent properties even when the bound particles are highly concentrated. The present invention provides (i) a method for binding water absorbent resin and (ii) a method for producing particulate water absorbent resin including the step of binding particles of water absorbent resin powder.

Abstract: A method includes the steps of: adding an organic surface cross-linking agent to a water absorbent resin having a cross-linked structure; adding a liquid permeability improving agent to the water absorbent resin concurrently with or after the addition of the organic surface cross-linking agent; and then adding a lubrication improving agent to the water absorbent resin. This provides a particulate water absorbing agent and a method for producing it, the particulate water absorbing agent being suitable for pneumatic transportation, suffering no decrease in the effect of the liquid permeability improving agent, and excelling in properties such as fluidity and damage resistance after the pneumatic transportation.

Abstract: A process for producing (meth)acrylic acid comprising the steps of: supplying a cooling medium to a crystallizer (1) from a heat source device (4A), thereby crystallizing (meth)acrylic acid from a crude (meth)acrylic acid solution; discharging the cooling medium from the crystallizer (1) and returning the cooling medium to the heat source device (4A); supplying a heating medium to the crystallizer (1) from a heat source device (4B), thereby melting the (meth)acrylic acid; and discharging the heating medium from the crystallizer (1) and returning the heating medium to the heat source device (4B); wherein temperature of the cooling medium returned to the heat source device (4A) is maintained constant by utilizing a first buffer tank (5); and temperature of the heating medium returned to the heat source device (4B) is maintained constant by utilizing a second buffer tank (6).

Abstract: The present invention has an object to provide a polyalkylene glycol-based polymer having high anti-soil redeposition ability in washing treatment and having high compatibility with surfactants. The polyalkylene glycol-based polymer includes: a structure unit (a) derived from a polyalkylene glycol-based monomer (A) of a specific structure, and a structure unit (b) derived from a carboxyl group-containing monomer (B) at specific ratios.

Abstract: A process for producing (meth)acrylic acid, comprising a crystallizing step of supplying a cooling medium from a refrigerator to a crystallizer and returning the cooling medium from the crystallizer to the refrigerator, thereby obtaining a (meth)acrylic acid crystal from a (meth)acrylic acid-containing solution; and a melting step of supplying a heating medium from a refrigerator to the crystallizer and returning the heating medium from the crystallizer to the refrigerator, thereby melting the (meth)acrylic acid crystal; wherein the crystallizing step and the melting step are respectively performed at least once, thereby producing purified (meth)acrylic acid from a crude (meth)acrylic acid solution; temperature of the cooling medium discharged from the refrigerator is maintained constant at temperature T1; temperature of the cooling medium to be returned to the refrigerator is maintained constant at temperature T2; the temperature T2 is adjusted depending on a production amount of the purified (meth)acrylic a

Abstract: The present invention relates to an emulsion for vibration damping materials, including an emulsion obtainable by emulsion polymerization of a monomer component, wherein the emulsion is obtainable by emulsion polymerization using an anionic emulsifier and/or a reactive emulsifier, and emulsion particles have an average particle diameter of 100 to 450 nm, and an emulsion for vibration damping materials, comprising acrylic emulsion particles each having a core part and a shell part, wherein the acrylic emulsion particles are obtainable by polymerizing a monomer component including a monomer having a Q value of 0.6 to 1.4 and an e value of ?0.4 to ?1.2.

Abstract: Provided is a method for producing a polyacrylic acid (salt)-based water absorbent resin, which is a convenient production method for a water absorbent resin for an absorbent suitable for practical use, the water absorbent resin having a reduced amount of residual monomers.

Abstract: A polarizing plate of the present invention includes a polyvinyl alcohol-based polarizer; and transparent protective films provided on both sides of the polarizer with an adhesive layer interposed between the polarizer and each transparent protective film, wherein the transparent protective film on one side comprises a lactone ring structure-containing (meth)acrylic resin and has an in-plane retardation of less than 40 nm and a thickness direction retardation of less than 80 nm, and the transparent protective film on the other side is a retardation plate that comprises a cellulose ester and satisfies the relation: nx>ny>nz, wherein nx is a refractive index in an X-axis direction where the in-plane refractive index is maximum, ny is a refractive index in a Y-axis direction perpendicular to the X-axis, and nz is a refractive index in a Z-axis direction corresponding to the thickness direction. The polarizing plate can satisfy durability and display uniformity (unevenness).

Abstract: A method of producing a water-absorbent resin of the present invention reduces amounts of a residual cross-linking agent and a residual surfactant, achieves high productivity, and improves physical properties of the resultant water-absorbent, such as absorption capacity, extractable polymer content, powder friction, and gel crushability. The method includes the steps of: polymerizing an aqueous monomer solution containing as a major component an acrylic acid monomer in the presence of a cross-linking agent; and drying the resultant polymer by heating, in which the cross-linking agent is a multifunctional (meth)acrylate cross-linking agent having polyethylene glycol structural units including a total of 6 to 200 ethylene oxide repeating units, and the aqueous monomer solution includes a mono(meth)acrylate compound having polyethylene glycol structural units in an amount of 0.1 to 30% by weight relative to an amount of the multifunctional (meth)acrylate cross-linking agent.

Abstract: A method for reducing colored foreign substances in a water absorbent resin by a convenient and simple technique in the production of a water absorbent resin, without requiring any modification of raw materials or high capital investment, is provided. The method for producing a particulate water absorbent resin includes a step of polymerizing an aqueous solution of an unsaturated monomer; and a step of drying a particulate water-containing gel-like cross-linked polymer having a solids concentration of 30% by weight or greater that is obtainable in a gel grain refining step during polymerization or after polymerization, with one or more apparatuses for aerating a water absorbent resin with a high temperature gas stream being installed in the drying step and/or in at least one of the subsequent steps, while in the aerating apparatus, the high temperature gas stream is passed through a filter and then is reused in the same step as the step where the aerating apparatus is installed, or in a different step.

Abstract: The present invention provides a surface treatment method for a water-absorbing resin comprising three steps of: 1) a humidifying and mixing step for mixing a base polymer and a surface cross-linking agent solution to obtain a “humidified substance”; 2) a pretreatment step for raising temperature of said humidified substance to obtain a “pretreated substance”; and 3) a surface cross-linking reaction step for cross-linking said pretreated substance to obtain a surface cross-linked “water-absorbing resin”; wherein dew point in the pretreatment step of the above 2) is from 50° C. to 95° C., and temperature of said humidified substance is raised from temperature below the dew point up to a temperature of 10° C. higher than the dew point.

Abstract: An electrophoretic display sheet comprising a display layer, a first electrode, and second electrodes. The display layer has a plurality of reservoir portions filled with a dispersion liquid containing particles. Each of the plurality of reservoir portions has predetermined positions. When an electric field having a direction is generated by applying a voltage to between the first electrode and the second electrodes, the particles are locally gathered to the predetermined positions of each of the plurality of reservoir portions so as to make rows of the particles along the direction of the electric field in the dispersion liquid. The electrophoretic display sheet is capable of exhibiting both superior responsiveness (responsibility) and superior color display performance with high contrast in changing a display color.

Abstract: There is provided a filling method which is capable of suppressing uneven distribution of particle diameter and suppressing property decrease of the particulate water-absorbing agent. The method for filling the particulate water-absorbing agent according to the present invention includes a abutting step for making a member for filling the particulate water-absorbing agent abutted on a vibrator; a supplying step for supplying the particulate water-absorbing agent to the member for filling; and a vibration step for vibrating the particulate water-absorbing agent present in the member for filling by vibrating the vibrator. Preferably, the supplying step is performed by dividing into a plurality of times. Preferably, the vibration step includes an intermediate vibration step performed at a stage where a part of a plurality of times of the supplying steps is completed, and a final vibration step performed at a stage where all of a plurality of times of the supplying steps is completed.

Abstract: Provided is a catalyst for producing unsaturated carboxylic acid, which excels in mechanical strength and attrition loss and is capable of producing the object product at a high yield. This catalyst is formed of a catalytically active component comprising molybdenum and vanadium as the essential ingredients and inorganic fibers, which are supported on an inert carrier, said catalyst being characterized in that said inorganic fibers comprise at least an inorganic fiber having an average diameter less than 1.0 ?m and another inorganic fiber having an average diameter ranging from 1.5 to 7 ?m.

Abstract: A combustion exhaust gas processing device comprises: a dust collector collecting dust in a cement kiln combustion exhaust gas; a wet dust collector as a catalyst-poisoning-substance stripper removing a catalyst-poisoning substance from a combustion exhaust gas which passed the dust collector, preheaters heating beforehand a combustion exhaust gas which passed the wet dust collector; and a catalyst device from which NOx, a persistent organic pollutant, etc. in the preheated combustion exhaust gas, are removed. A titanium-vanadium catalyst etc. as an oxide catalyst is used upstream of the catalyst device, and a platinum catalyst etc. as a noble-metal catalyst downstream of the catalyst device. The temperature of the combustion exhaust gas after the catalyst-poisoning substance is removed is increased up to 140° C. or more with the preheaters to prevent decline in denitration efficiency of and the decomposition efficiency of a volatile organic compound.

Abstract: A siloxane compound comprising a structure unit formed by connecting at least one organic skeleton having an imido bond to a silicon atom forming a siloxane bond, wherein the silane compound is defined by the following average formula: XaYbZcSiOd. X denotes groups including an organic skeleton having an imido bond, represented by formula (1) in the specification; Z denotes an organic groups having no imido bond; Y denotes at least one of hydrogen, hydroxyl, halogen, and OR; R denotes at least one of alkyl, acyl, aryl, and unsaturated aliphatic residual groups and may have a substituent; a is ?3 and >0; b is 0?3; c is 0?3; d is ?2 and >0; and a+b+c+2d=4, R1 denotes at least one from aromatic, heterocyclic, and alicyclic rings; x and z independently ?0 and ?5; and y is 0 or 1.

Abstract: The objective of the present invention is to provide a process for producing highly pure (meth) acrylic acid stably and efficiently with crystallization. The process for production of (meth)acrylic acid according to the present invention is characterized in comprising the steps of cooling a crude (meth)acrylic acid solution in a crystallization apparatus until the temperature of a cooling medium discharged from the crystallization apparatus is stabilized in the range of higher than the solidification point of the crude (meth)acrylic acid solution in the crystallization apparatus and not more than the solidification point plus 5° C.; then bringing the crude (meth)acrylic acid solution in the crystallization apparatus to a supercooled condition by setting the temperature of a cooling medium supplied to the crystallization apparatus at the temperature of not more than the solidification point of the crude (meth)acrylic acid solution minus 1° C.

Abstract: To provide: a curable resin composition which can be continuously produced without gelling during production, and has excellent basic performances such as heat resistance and moisture resistance; an optical member which has excellent optical characteristics such as high transparency and exhibits excellent performances in a harsh use environment; and a method for controlling an optical material. A curable resin composition including an organic resin component and a metalloxane component, wherein the organic resin component includes a resin component having an Abbe number of 45 or more and the metalloxane component has a metalloxane bond; an optical material comprising the above-mentioned curable resin composition; an optical member produced by curing the optical material; and a method for controlling an Abbe number and/or a refractive index of an optical material.