Abstract: The purging agent of the invention is for use in purging a resin to be purged which includes an ethylene/vinyl ester copolymer saponification resin, the purging agent being a hydrocarbon-based resin composition that contains a relatively large amount of at least one metal salt selected from the group consisting of alkali metal salts and salts of alkaline earth metals, the shear viscosity ratio as determined with the following equation satisfying a specific range. Shear viscosity ratio=?(X)/?(Y) [In the equation, ?(X) is shear viscosity (Pa·s) at a temperature of 230° C. and a shear rate of 12.2 sec?1, and ?(Y) is shear viscosity (Pa·s) at a temperature of 230° C. and a shear rate of 1,824 sec?1.

Abstract: The present invention provides a binder for a lithium ion secondary battery electrode that has good adhesive properties and a low degree of swelling with respect to an electrolytic solution. There is used a binder for a lithium ion secondary battery electrode, which comprises a polyvinyl acetal-based resin (A) containing structural units represented by chemical formulae (1) to (3): (R1 is a hydrogen atom or an alkyl group having 1 to 10 carbon atoms), and (R2 is a functional group containing an ethylenically unsaturated bond).

Abstract: The present invention provides the resin composition having excellent inflation moldability by which a film having high water vapor transmission rate (WVTR) and low elastic modulus can be produced, and a film which is formed from the resin composition. The present invention relates to a resin composition comprising a polyamide resin (A) and a polyvinyl alcohol-based resin (B) which includes 2-10% by mole of structural unit represented by the following general formula (1) and has a degree of saponification of 70-90% by mole, and a film which is formed from the resin composition. [In the formula, R1 to R6 each independently represent a hydrogen atom or an organic group, and X represents a single bond or a linking chain.

Abstract: A laminate-shaping support material includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.

Abstract: To provide an aqueous inkjet ink composition excellent in glossiness and other ink properties and imparted with a higher viscosity without the use of a tackifier, an acrylic resin emulsion for an aqueous inkjet ink is provided, which contains a particulate acrylic resin having an acid value of 1 to 100 mgKOH/g, wherein an acid-group-containing monomer is present at a content mole ratio (As) in surface regions of particles of the particulate acrylic resin and present at a content mole ratio (At) in the overall acrylic resin particles as measured with a 1H spin diffusion time of 5 ms, and a ratio (As/At) of the content mole ratio (As) to the content mole ratio (At) is not less than 9.

Abstract: To obtain an aqueous coating liquid which affords, by applying it on a plastic substrate and drying it, a coated film excellent in transparency, gas barrier properties, and adhesiveness to the substrate and excellent in homogeneity. An aqueous coating liquid containing a polyvinyl alcohol resin (A), a polyethyleneimine (B), a nonionic surfactant (C), and an aqueous solvent (D).

Abstract: Acetoacetyl group-containing polyvinyl alcohol resin powder composition containing a C1 to C3 alcohol in an amount of 0.5 to 4 wt % is produced by allowing a powdery polyvinyl alcohol resin to react with diketene, washing the resulting acetoacetyl group-containing polyvinyl alcohol resin particles with the C1 to C3 alcohol to remove an unreacted portion of the diketene, and drying the intermediate acetoacetyl group-containing polyvinyl alcohol resin particles composition at a temperature of 40° C. to 120° C. at a pressure of not higher than 20 kPa after the washing. The acetoacetyl group-containing polyvinyl alcohol resin powder composition thus produced is highly soluble in water.

Abstract: The present invention provides a saponified ethylene-vinyl ester copolymer product from which a film having reduced fish eyes can be obtained and a method for producing an ethylene-vinyl ester copolymer that is a precursor thereof. At the time of producing the ethylene-vinyl ester copolymer, as a vinyl ester monomer, the oxygen concentration at storage and/or transportation is adjusted to from 2 to 8 ppm and the oxygen concentration at polymerization is adjusted to less than 2 ppm.

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.

Abstract: This is to provide an aqueous metal surface treatment agent for a lithium ion secondary battery which can improve interlaminar adhesiveness between a metal member and a resin coating layer such as a film or a coated film, and solvent resistance without using trivalent chromium. The aqueous metal surface treatment agent for a lithium ion secondary battery comprises a polyvinyl alcohol resin containing 2 to 15 mol % of a 1,2-diol structural unit represented by the formula (1): Having a degree of saponification of 90 to 99.9 mol % and an average degree of polymerization of 250 to 3000; and a metallic crosslinking agent.

Abstract: A heat-sensitive color-developing layer of a heat-sensitive recording medium and a coating liquid for forming the heat-sensitive color-developing layer each contain a leuco dye, a color developing agent and a polyvinyl alcohol resin containing an acetoacetyl group and a sulfonic acid group or a combination of a polyvinyl alcohol resin containing an acetoacetyl group and a polyvinyl alcohol resin containing a sulfonic acid group. Therefore, the heat-sensitive recording medium and the coating liquid for forming the heat-sensitive color-developing layer are excellent in light resistance, and free from unintended color development and discoloration even when exposed to ultraviolet radiation.

Abstract: Provided is a melt-molding material which is produced using an EVOH resin and has improved feeding property. A pellet mixture comprising a first EVOH resin pellets (pellet 1) each having approximately circular or elliptical cross-section and having an ethylene unit content of 20 to 34 mol %, and a second EVOH resin pellets (pellet 2) each having ethylene unit content of 35 to 60 mol %, wherein the difference of ethylene unit content between the pellet 1 and the pellet 2 is from 10 to 30 mol %.

Abstract: To provide a double-sided pressure-sensitive adhesive tape for fixing aircraft parts which is excellent in terms of hand tearability, flame retardance, and removability in a well-balanced manner. A double-sided pressure-sensitive adhesive tape for fixing aircraft parts which is a double-sided pressure-sensitive adhesive tape having pressure-sensitive adhesive layers on both sides of a substrate having hand tearability, characterized in that when S represents an pressure-sensitive adhesive strength of one pressure-sensitive adhesive layer (I) and W represents an pressure-sensitive adhesive strength of the other pressure-sensitive adhesive layer (II), the W is 2-20 N/25 mm and S/W is 1.5 or larger, and the double-sided pressure-sensitive adhesive tape passes the flammability test as provided for in FAR25.853(a)app.F.Part1(a)(1)ii.

Abstract: Disclosed is a resin composition comprising a melt-moldable side chain 1,2-diol-containing PVA-based resin (A), and fluororesin containing a polar functional group capable of reacting with or forming hydrogen bond(s) with hydroxyl group (B). The component (A) and the component (B) have excellent affinity, and therefore if either the component (A) or component (B) becomes matrix, the other can be finely dispersed into the matrix, thus providing a resin composition having excellent gas-barrier property, solvent resistance, and bending fatigue resistance. The present invention also provides emulsified dispersion and binder in which the resin composition is used.

Abstract: The invention provides a saponified ethylene-vinyl ester copolymer pellet which can be inhibited from cracking, chipping and generation of fine powder at the time of transport and is excellent in melt moldability. The saponified ethylene-vinyl ester copolymer pellet of the invention is a pellet which is obtained from a resin composition containing a saponified ethylene-vinyl ester copolymer resin and in which an amount of fine powder after an impact crushing test with ball mill is 400 ppm or less with respect to the saponified ethylene-vinyl ester copolymer pellet.

Abstract: The present invention provides a drilling fluid additive comprising a specific cation-modified PVA-based resin and a drilling fluid containing the same. The drilling fluid additive can reduce hydration swelling of inorganic clay mineral such as bentonite, and provide a drilling fluid such as drilling mud capable of forming a thin and tough mud wall on the stratum during drilling operation.

Abstract: Provided is a melt-molding material using saponified ethylene-vinyl ester-based copolymer (EVOH resin), and has excellent feed property during melt extrusion molding. The molding material consists of EVOH resin pellets comprising a first EVOH resin pellet having approximately circular or elliptical cross section and a second EVOH resin pellet having a cylindrical shape. The ratio in weight of the first EVOH resin pellet (A1) to the second EVOH resin pellet (A2), A1/A2, is from 99/1 to 20/80.

Abstract: Provided is a liquid spray agent for agricultural use, including a polyvinyl alcohol-based resin having a saponification degree of from 30 mol %, to 60 mol %. With this, a liquid spray agent for agricultural use, which is used in agricultural and horticultural fields and has high fixation ability and excellent sprayability, can be provided.

Abstract: The present invention provides a crosslinkable prepolymer which can be used to produce crosslinked polymeric materials (or contact lenses containing the same) having a high strength and excellent durability. The present invention relates to a polyvinyl alcohol-based prepolymer containing a unit having a pendant 1,2-diol containing group and a unit having a specific crosslinkable functional group, as well as a molding using the same.

Abstract: As a molding material comprising two or more EVOH resins differing in their ethylene unit content, disclosed is a pellet mixture of two or more types of EVOH resin pellets differing in their ethylene unit content. The pellet mixture has excellent feed property and film moldability with reduced surge in melt extrusion molding. Disclosed is a molding material comprising the pellet mixture and lubricant, in which more than 75% by weight of the lubricant is carried on their surface of low ethylene EVOH resin pellets having lowest ethylene unit content.