Abstract: Conventional methods suffer from unsatisfactory performance of the dehydration-preventing agent at a high temperature, and the present invention provides a cement admixture exhibiting an excellent dehydration-preventing effect at a high temperature. The cement admixture of the present invention includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.

Abstract: The present invention relates to a secondary battery negative electrode binder composition with which a stable negative electrode active material layer can be formed, which can follow volumetric changes in the negative electrode, whereby a secondary battery can be manufactured that achieves a high charge/discharge capacity and allows for improvement in charge/discharge cycle characteristics. Provided is a binder composition for fabricating a secondary battery negative electrode, containing an element capable of forming an alloy with lithium as an active material, which is a secondary battery negative electrode binder composition comprising an emulsion in which polymer particles derived from an ethylenically unsaturated monomer are dispersed in an aqueous solution of a polyvinyl alcohol-based resin, wherein the ratio of the polyvinyl alcohol-based resin/polymer particles is 60/40 to 99/1, as a weight ratio of resin solids.

Abstract: The present invention relates to a resin composition containing a saponified ethylene-vinyl ester-based copolymer (A), cinnamic acids (B), and at least either one (C) of an alkali metal salt (C1) and an alkaline earth metal salt (C2) (provided that the component (C) excludes a salt of cinnamic acid), a melt-molded article using the composition, and a multilayer structure.

Abstract: An ethylene-vinyl alcohol copolymer resin composition pellet group is provided, which is excellent in long-run processability. The ethylene-vinyl alcohol copolymer resin composition pellet group is a group of pellets of an ethylene-vinyl alcohol copolymer resin composition containing an ethylene-vinyl alcohol copolymer and a divalent metal salt, wherein not greater than 3% of the pellets have a b*-value of not less than 5 after the pellets are heat-treated at 230° C. for 30 minutes.

Abstract: An ethylene-vinyl alcohol copolymer composition can be formed into a product having very few minute fisheyes. The ethylene-vinyl alcohol copolymer composition comprises: an ethylene-vinyl alcohol copolymer; and an iron compound; wherein the ethylene-vinyl alcohol copolymer is a saponification product of an ethylene-vinyl ester copolymer prepared by using an organic compound having a half-life of 10 to 300 minutes at 60° C. as a polymerization initiator; wherein an amount of the iron compound is 0.001 to 2 ppm in terms of a metal by weight of the ethylene-vinyl alcohol copolymer composition.

Abstract: A packaging bag for packaging a melt-processable polyvinyl alcohol resin is formed from a film having a methanol vapor transmission rate of 0.5 to 1000 g/m2·day. A method of storing a melt-processable polyvinyl alcohol resin includes the step of sealingly packaging melt-processable polyvinyl alcohol resin particles with the use of the packaging bag formed from the aforementioned film. Where the melt-processable polyvinyl alcohol resin is packaged with the use of the packaging bag, therefore, an organic solvent remaining in the packaged polyvinyl alcohol resin can be released in the form of vapor to the outside through the packaging bag to dissipate, whereby the resulting polyvinyl alcohol resin has a reduced organic solvent concentration after storage thereof in the packaging bag. As a result, the melt-processable polyvinyl alcohol resin is improved in forming stability.

Abstract: Provided is EVOH resin pellet capable of suppressing the occurrence of fish eye even in a resultant monolayer film, and the method for producing the same. The EVOH resin pellet contains a boron compound and the boron amount in a surface portion of the pellet is 1.7 ppm or less. After the EVOH resin pellet is made to contain the boron compound, the EVOH resin pellet is rinsed with a mixture of water and alcohol so that the amount of the boron compound in a surface portion can be reduced.

Abstract: Provided is an EVOH resin pellet which is capable of reducing the occurrence of fish eyes in a melt molded article of an EVOH resin. The occurrence of fish eyes in a melt molded article such as a film that is produced by melt molding using pellets is able to be suppressed by setting the abundance of a conjugated polyene in a surface portion of the pellet to an intended amount or more.

Abstract: Disclosed is a dispersing agent for agrochemicals, said dispersing agent which comprises a modified polyvinyl alcohol-based resin containing a structural unit having a nonionic hydrophilicity group in side chain, and having a saponification degree of 95 mol % or more. The dispersing agent for agrochemicals can provide a dispersion in which a hardly water-soluble agrochemical active ingredient employed for a dispersoid is dispersed in a stable state even in the case where the dispersoid has a relatively large particle size.

Abstract: A resin composition includes: an ethylene-vinyl ester copolymer saponified product (A); and fatty acid metal salts, wherein the fatty acid metal salts include at least two fatty acid metal salts selected from a fatty acid metal salt having 3 to 12 carbon atoms (B), a fatty acid metal salt having 13 to 20 carbon atoms (C), and a fatty acid metal salt having 21 to 29 carbon atoms (D), and wherein at least one of the fatty acid metal salts selected from the fatty acid metal salts (B), (C), and (D) includes a zinc salt. The resulting resin composition is capable of forming a multilayer structure that has suppressed occurrence of appearance failure and minimized color tone deterioration at the time of its melt molding.

Abstract: The purpose of the present invention is to establish a more precise method for evaluating long-run moldability and, based on this method, improve long-run moldability of a resin composition containing an EVOH-based resin and a nylon 6-based polyamide. Provided is a resin composition having improved long-run moldability and containing an EVOH-based resin and a nylon 6-based polyamide, wherein the amount of ?-caprolactam is 200 ppm or less. When the resin composition comprises an EVOH-based resin and a nylon 6-based polyamide, contacting the resin composition with water can reduce the amount of ?-caprolactam.

Abstract: A water-soluble film comprises a polyvinyl alcohol resin (A), wherein a difference (?R) between a phase retardation (R?) of one of opposite surfaces (? surface) of the water-soluble film and a phase retardation (R?) of the other surface (? surface) of the water-soluble film is not greater than 8 nm as measured on a middle portion of the water-soluble film with respect to a transverse direction (TD) of the water-soluble film. Therefore, the water-soluble film has a reduced difference in crystallinity between the front and back surfaces thereof and, hence, is less liable to be curled to thereby ensure a higher productivity.

Abstract: A water-soluble film is provided, which has excellent mechanical properties (higher tensile strength and higher tensile elongation) and can be formed into an excellent package which is free from deterioration of the tension of the water-soluble film over time even if containing liquid such as a liquid detergent packaged therein. The water-soluble film includes: (A) a polyvinyl alcohol resin; and (B) a plasticizer; wherein the plasticizer (B) includes a polyalcohol (b1) having a melting point of at least 80° C. and a polyalcohol (b2) having a melting point of not higher than 50° C.; wherein the plasticizer (B) is present in a proportion of at least 25 parts by weight based on 100 parts by weight of the polyvinyl alcohol resin (A).

Abstract: A water-soluble film is provided which is highly water-soluble and can be formed into an excellent package which has a higher film strength and a higher seal portion peel strength and hence is free from liquid leakage even with liquid such as a liquid detergent packaged therein. A chemical agent package produced by packaging a chemical agent with the water-soluble film is also provided. The water-soluble film comprises a polyvinyl alcohol resin (A), and has an inter-film peel strength of at least 70 g/15 mm as measured after two pieces of the water-soluble film are moisture-conditioned in an environment at 23° C. at 50% RH for 1 day, then bonded to each other with water and allowed to stand for 1 minute.

Abstract: A water-soluble film for packaging a liquid detergent containing a polyalcohol (Y) comprises a polyvinyl alcohol resin (A) and a polyalcohol (X), wherein the proportion x (wt. %) of the polyalcohol (X) with respect to the polyvinyl alcohol resin (A) and the proportion y (wt. %) of the polyalcohol (Y) contained in the liquid detergent satisfy the following expression: x>y The water-soluble film can be formed into an excellent package which is free from deterioration in the tension of the water-soluble film over time even with the liquid detergent packaged therein.

Abstract: A water-soluble film contains a polyvinyl alcohol resin (A), and has a complete dissolution time (T) and a curl area percentage (S), wherein a product (T×S) of the complete dissolution time (T) and the curl area percentage (S) satisfies the following expression (1): 1000?(Complete dissolution time (T))×(Curl area percentage (S))?7000??(1) The water-soluble film satisfies contradictory property requirements, i.e., satisfactory solubility and curl suppressing property, for example, even if being formed by using an acid-modified PVA resin.

Abstract: The present disclosure provides a resin composition which contains: (A) a saponified ethylene-vinyl ester copolymer; and (B) a cinnamate; wherein the cinnamate (B) is present in a proportion of 0.01 to 10 ppm based on the amount of the saponified ethylene-vinyl ester copolymer (A). Therefore, the use of the resin composition makes it possible to produce a film which is highly transparent, capable of absorbing ultraviolet radiation of a specific wavelength range (e.g., UV-B and UV-C having a wavelength shorter than 320 nm) and free from an odor problem and the like.

Abstract: Provided herein is a polyvinyl alcohol fine particle suitable for a pharmaceutical binder for obtaining a pharmaceutical tablet of properties including good sustained release, high hardness, and excellent friability. The polyvinyl alcohol fine particle of the present invention contains 25 mol % or more of a gauche structure in polyvinyl alcohol molecules within a 0.8-nm region inside the particle from the particle surface.

Abstract: An ethylene-vinyl alcohol copolymer has an ethylene content of 20 to 60 mol % and includes a carboxylic acid group and a lactone ring group present at terminals thereof, wherein the molar concentration (Y/Z) of a lactone ring molar content (Y) to a sum (Z) of a carboxylic acid molar content (X) and the lactone ring molar content (Y) is not less than 58 mol %. The ethylene-vinyl alcohol copolymer is excellent in high-temperature thermal stability substantially without thermal decomposition, and is free from odor emanation and coloration even if being processed at a higher temperature.

Abstract: A drilling fluid adjusting agent using a PVA-based resin capable of contributing to the reduction of hydration swelling of bentonite even in the presence of salts; and a drilling fluid using the same are provided. The drilling fluid adjusting agent contains a PVA containing 1,2-diol structural unit in a side chain thereof. The drilling fluid adjusting agent has excellent solubility even in the presence of salts such as potassium ion, and also has excellent reduction of hydration swelling of bentonite.