Abstract: The present invention relates to a method for producing an acetalization product of an ethylene/vinyl alcohol copolymer by acetalization of an ethylene/vinyl alcohol copolymer, wherein the ethylene/vinyl alcohol copolymer is a porous object.

Abstract: The present invention relates to an ionomer resin comprising a carboxylic acid ester unit (A), a carboxylic acid unit (B), a neutralized carboxylic acid unit (C), and an ethylene unit (D), wherein, based on the total of monomer units constituting the ionomer resin, the content of the carboxylic acid ester unit (A) is 0.01 to 1.8 mol %, and the total content of the carboxylic acid ester unit (A), the carboxylic acid unit (B), and the neutralized carboxylic acid unit (C) is 6 to 10 mol %, and based on measurement of the molecular weight in terms of polyethylene by GPC with the carboxylic acid unit (B) and the neutralized carboxylic acid unit (C) being converted into a methyl carboxylate unit, the ratio of a low-molecular-weight component having a molecular weight of 2,500 g/mol or less obtained from an integral molecular weight distribution curve is 2.6 to 4.0 mass %, and the number average molecular weight is 8,000 to 14,000 g/mol.

Abstract: The present invention relates to an ionomer resin, comprising a (meth)acrylic acid unit (A), a neutralized (meth)acrylic acid unit (B) and an ethylene unit (C), wherein a total content of the unit (A) and the unit (B) is 6 to 10% by mole based on all monomer units constituting the ionomer resin, and the content of a transition metal in the ionomer resin is 0.01 to 100 mg/kg.

Abstract: The present invention relates to a polyvinyl acetal resin film, comprising a polyvinyl acetal resin material, wherein the polyvinyl acetal resin film has a thickness of 5 to 350 ?m, and satisfies the following Formulae (1) and (2) where, comparing one surface and the other surface, a mean value of the 10-point average roughness of a rougher surface A and a mean value of the 10-point average roughness of a smoother surface B are defined as Rz1(a) ?m and Rz2(a) ?m, respectively: Rz1(a)>1.1×Rz2(a)??(1) 3>Rz2(a)??(2), a value obtained by dividing the standard deviation of the 10-point average roughness of the surface A by Rz1(a) and a value obtained by dividing the standard deviation of the 10-point average roughness of the surface B by Rz2(a) are each 0 to 0.30, a viscosity of a toluene/ethanol (1:1, mass ratio) solution containing 10%-by-mass of a polyvinyl acetal resin contained in the polyvinyl acetal resin material, which is measured at 20° C.

Abstract: The present invention relates to a resin composition, comprising: a modified vinyl acetal resin which comprises 20 to 80 mol % of ethylene units and 4 to 76 mol % of vinyl alcohol units based on all monomer units constituting the resin, and has an acetalization degree of 5 to 80 mol %; and an alkali metal salt and/or an alkaline earth metal salt of a strong acid, wherein a total content of the alkali metal salt and/or the alkaline earth metal salt of the strong acid is 0.0005 to 0.06 part by mass with respect to 100 parts by mass of the modified vinyl acetal resin.

Abstract: The present invention relates to an ionomer resin, comprising: a (meth)acrylic acid unit (A); a neutralized (meth)acrylic acid unit (B); and an ethylene unit (C), wherein the total amount of the unit (A) and the unit (B) is from 6 to 10 mol % based on the entire monomeric units constituting the ionomer resin, and wherein the amount of a salt composed of a strong acid and a strong base in the ionomer resin is from 1 to 400 mg/kg.

Abstract: The present invention relates to a method of manufacturing an ionomer resin, comprising the steps of: (i) adding a poor solvent to a crude ionomer resin solution comprising a (meth)acrylic acid unit (A), a neutralized (meth)acrylic acid unit (B) and an ethylene unit (C) to allow a granular resin with a peak top particle size of from 50 to 700 ?m to be precipitated; and (ii) washing the precipitated granular resin with a washing solution; wherein the total amount of the unit (A) and the unit (B) is from 6 to 10 mol % based on the entire monomeric units constituting the crude ionomer resin.

Abstract: The problem to be solved by the invention is to provide an ionomer having excellent transparency, maintaining a high elastic modulus at high temperatures, being less coloration, and having a reduced odor during molding processing. The means for solving the problem is an ionomer comprising 0.05 to 1.0 mol % of (meth)acrylic acid ester units, 4.5 to 9.0 mol % of carboxylic acid units, 0.65 to 3.0 mol % of carboxylic acid neutralized product units, and ethylene units, based on the total monomer units which constitute the resin, with the total content of the (meth)acrylic acid ester units, the carboxylic acid units, and the carboxylic acid neutralized product units being 7.0 to 10 mol %.

Abstract: The problem to be solved of the present invention is to provide a modified vinyl acetal resin for an interlayer film of laminated glass having excellent transparency, impact resistance, heat resistance and molding ability. The means for solving the problem is a modified vinyl acetal resin for an interlayer film of laminated glass comprising 25 to 60 mol % of ethylene units and 24 to 71% by mol of vinyl alcohol units, based on all the monomer units constituting the resin, and having the acetalization degree of 5 mol % or more and less than 40 mol %.

Abstract: Provided is an interlayer film for laminated glass which is excellent in sound insulation property and has improved sound insulation performance not only in a coincidence region but also in a mass-dominated region. The interlayer film for laminated glass includes a sound insulating layer which is formed from a composition (A) containing at least one resin (a1) selected from a thermoplastic resin and a thermosetting resin, wherein a tan ? obtained when a dynamic viscoelasticity of a sheet, which is obtained by molding the composition (A) to have a thickness of 0.8 mm, is measured at a frequency of 0.3 Hz in a tension mode has a maximal value at a temperature TA (° C.), TA (° C.) is in a range of ?50 to 50° C., and the tan ? at TA (° C.) is 2.5 or more.

Abstract: The present invention relates to a polyvinyl acetal resin film, comprising a polyvinyl acetal resin material, wherein the polyvinyl acetal resin film has a thickness of 5 to 350 ?m, and satisfies the following Formulae (1) and (2) where, comparing one surface and the other surface, a mean value of the 10-point average roughness of a rougher surface A and a mean value of the 10-point average roughness of a smoother surface B are defined as Rz1(a) ?m and Rz2(a) ?m, respectively: Rz1(a)>1.1×Rz2(a)??(1) 3>Rz2(a)??(2), a value obtained by dividing the standard deviation of the 10-point average roughness of the surface A by Rz1(a) and a value obtained by dividing the standard deviation of the 10-point average roughness of the surface B by Rz2(a) are each 0 to 0.30, a viscosity of a toluene/ethanol (1:1, mass ratio) solution containing 10%-by-mass of a polyvinyl acetal resin contained in the polyvinyl acetal resin material, which is measured at 20° C.

Abstract: Provided are a resin composition, a pellet, a veil, a vibration damping material, a sound insulator, and an intermediate film for laminated glass, each of which is much more excellent in damping properties. Specifically, the resin composition is a resin composition containing the following block copolymer or hydrogenation product thereof (X); and a tackifier resin (Y) having a glass transition temperature of ?50 to 45° C., wherein when a glass transition temperature of a polymer block (B) of the block copolymer or hydrogenation product thereof (X) is designated as Tg(X), and a glass transition temperature of the tackifier resin (Y) is designated as Tg(Y), an absolute value of a difference between Tg(X) and Tg(Y) is 50° C.

Abstract: Provided is an interlayer film for laminated glass which is excellent in sound insulation property and has improved sound insulation performance not only in a coincidence region but also in a mass-dominated region. The interlayer film for laminated glass includes a sound insulating layer which is formed from a composition (A) containing at least one resin (a1) selected from a thermoplastic resin and a thermosetting resin, wherein a tan ? obtained when a dynamic viscoelasticity of a sheet, which is obtained by molding the composition (A) to have a thickness of 0.8 mm, is measured at a frequency of 0.3 Hz in a tension mode has a maximal value at a temperature TA (° C.), TA (° C.) is in a range of ?50 to 50° C., and the tan ? at TA (° C.) is 2.5 or more.

Abstract: An intermediate film for laminated glasses, the intermediate film having at least a sound insulation layer that comprises a resin composition A containing 100 parts by mass of a thermoplastic resin and 10 to 1000 parts by mass of a damping-property-imparting agent, wherein the damping-property-imparting agent has a molecular weight of 100 to 10000 and does not have a melting point at a temperature higher than 30° C., and the resin composition A has a maximum value of tan ? at a temperature of 30° C. or lower, and the maximum value is more than 3.1.

Abstract: Provided are a resin composition, a pellet, a veil, a vibration damping material, a sound insulator, and an intermediate film for laminated glass, each of which is much more excellent in damping properties. Specifically, the resin composition is a resin composition containing the following block copolymer or hydrogenation product thereof (X); and a tackifier resin (Y) having a glass transition temperature of ?50 to 45° C., wherein when a glass transition temperature of a polymer block (B) of the block copolymer or hydrogenation product thereof (X) is designated as Tg(X), and a glass transition temperature of the tackifier resin (Y) is designated as Tg(Y), an absolute value of a difference between Tg(X) and Tg(Y) is 50° C.

Abstract: To provide a laminated product of a layer including a polyvinyl acetal and a layer including a hydrocarbon-based polymer, having excellent adhesion between the layers. A composition including, with respect to 100 parts by mass of a polyvinyl acetal satisfying definition 1 and/or definition 2, 30 to 70 parts by mass of a plasticizer including 0.5 to 100% by mass of a plasticizer containing a polar group and 0 to 99.5% of a plasticizer containing no polar group. Definition 1: When 1 g of a polyvinyl acetal is dissolved in 100 g of methanol, an undissolved content is 2.5 to 90% by mass. Definition 2: When 1 g of a polyvinyl acetal is dissolved in 100 g of chloroform, an undissolved content is 5 to 70% by mass.

Abstract: A composition including 100 parts by mass of a polyvinyl acetal and 30 to 70 parts by mass of a plasticizer including 0.5 to 100% by mass of a plasticizer containing a polar group and 0 to 99.5% by mass of a plasticizer containing no polar group, a total of the plasticizer containing a polar group and the plasticizer containing no polar group being 100% by mass. When the polyvinyl acetal is analyzed by HPLC using an ODS column having an inner diameter of 4 mm and a length of 1 cm, the polyvinyl acetal exhibits a first peak and a second peak derived from polyvinyl acetals. In addition, a laminated product of a layer including a polyvinyl acetal and a layer including a hydrocarbon-based polymer.

Abstract: An object is to provide a polyvinyl acetal composition which includes polyvinyl acetals having different average amounts of remaining hydroxyl groups and from which a sheet having excellent transparency can be molded. A polyvinyl acetal composition comprising 3 to 100 parts by mass of polyvinyl acetal (B) with respect to 100 parts by mass of polyvinyl acetal (A), and 0.05 to 0.75 times by mass of compound (C) with respect to the total mass of polyvinyl acetal (A) and polyvinyl acetal (B). The polyvinyl acetal (A) has an average amount of remaining hydroxyl groups of X mol % (X is a positive number), the polyvinyl acetal (B) has an average amount of remaining hydroxyl groups of Y mol % (Y is a positive number), and |X?Y|?3 is satisfied.

Abstract: Provided is a laminate which is excellent in handleability and exhibits excellent safety performance in the case of being used as an interlayer film for safe laminated glass and in which handleability is less likely to be degraded in the case of being stored for long periods. The present invention is a laminate including a layer (1) and a layer (2) on at least one surface of the layer (1), at least one layer of outermost layers being the layer (1), the laminate having a laminated structure with three or more layers, wherein the layer (1) contains a thermoplastic resin (I), the layer (2) contains a thermoplastic resin (II) and contains 4 to 200 parts by mass of a plasticizer A with respect to 100 parts by mass of the thermoplastic resin (II), and in a case where a hydroxyl value of the plasticizer A is designated as HV(A) mgKOH/g, HV(A)?30.

Abstract: A laminate contains a layer A and a layer B. The layer A includes a polyvinyl acetal (A), a plasticizer (Ap), and a dispersant (Ad). The layer B includes a polyvinyl acetal (B) and a plasticizer (Bp) and optionally a dispersant (Bd). A mass ratio of (Ad) to (Ap) is larger than a mass ratio of (Bd) to (Bp). The plasticizer (Ap) and the plasticizer (Bp) are an ester compound of an m-valent alcohol with m molecules of a monovalent carboxylic acid having 8 to 16 carbon atoms, where m is a number of 2 to 4; and an ester compound of an n-valent alcohol with n molecules of a monovalent carboxylic acid having 8 to 16 carbon atoms, where n is a number of 2 to 4, respectively. The dispersant (Ad) and the dispersant (Bd) are obtained by hydrolyzing the plasticizer (Ap) and the plasticizer (Bp), respectively.