Abstract: Provided is a thermoplastic polymer composition, including a thermoplastic elastomer (A) and a polyvinyl acetal (B), wherein the thermoplastic elastomer (A) is a styrene-based thermoplastic elastomer or an olefin-based thermoplastic elastomer. Thus, a thermoplastic polymer composition is provided that has good flexibility as a thermoplastic elastomer composition, is excellent in mechanical properties and formability, and also itself has excellent adhesion to a ceramic, a metal, or a polar polymer. In addition, provided is a shaped article in which the thermoplastic polymer composition is adhered to a ceramic, a metal, or a polar polymer, in particular a shaped article adhered to a glass.

Abstract: There is provided a binder for ceramic formation or a conductive paste, comprising polyvinyl acetal having a degree of acetalization of from 50 to 85 mol %, a content of vinyl ester monomer unit of from 0.1 to 20 mol %, and having a viscosity-average degree of polymerization of from 200 to 5000, wherein a peak-top molecular weight (A) as measured by a differential refractive index detector and a peak-top molecular weight (B) as measured by an absorptiometer (measurement wavelength: 280 nm) in gel permeation chromatographic measurement of the polyvinyl acetal heated at 230° C. for 3 hours satisfy a formula (1) (A?B)/A<0.60 and the polyvinyl acetal has an absorbance in the peak-top molecular weight (B) of from 0.50×10?3 to 1.00×10?2.

Abstract: Provided is a polyoxyalkylene modified vinyl alcohol-based polymer comprising a polyoxyalkylene group in a side chain, wherein the polymer has a viscosity average degree of polymerization of not less than 150 and not more than 5000, a degree of saponification of not less than 40 mol % and not more than 99.99 mol %, and a polyoxyalkylene group modification rate of not less than 0.05 mol % and not more than 10 mol %; and the polyoxyalkylene group is composed of a polyoxypropylene block and a (poly)oxyethylene block and is represented by the following general formula (I). Such polymer is excellent in temperature-sensitive thickening properties. (in the general formula (I), R1 denotes a hydrogen atom or an alkyl group having a carbon number of from 1 to 8; either one of R2 and R3 is a methyl group and the other is a hydrogen atom; and 10?m?40 and 1?n?50).

Abstract: Provided is a thermoplastic acrylic resin composition comprising a methacrylic resin (A) and a polyvinyl acetal resin (B) obtained by acetalizing a polyvinyl alcohol resin with an aldehyde having 4 or more carbon atoms and an aldehyde having 3 or less carbon atoms in which the total amount of the vinyl alcohol units acetalized with the aldehyde having 4 or more carbon atoms and the aldehyde having 3 or less carbon atoms is 65 to 85 mol % of all repeating units, and the molar ratio of the vinyl alcohol unit acetalized with the aldehyde having 4 or more carbon atoms to the vinyl alcohol unit acetalized with the aldehyde having 3 or less carbon atoms is from 90/10 to 0/100. Furthermore, provided are an article molded from the thermoplastic acrylic resin composition and a method of producing the thermoplastic acrylic resin composition comprising the steps of mixing a methacrylic resin (A) and a polyvinyl acetal resin (B), increasing the resin temperature to 160° C.

Abstract: Provided is a polyoxyalkylene modified vinyl alcohol-based polymer comprising a polyoxyalkylene group in a side chain, wherein the polymer has a viscosity average degree of polymerization of not less than 150 and not more than 5000, a degree of saponification of not less than 40 mol % and not more than 99.99 mol %, and a polyoxyalkylene group modification rate of not less than 0.05 mol % and not more than 10 mol %; and the polyoxyalkylene group is composed of a polyoxypropylene block and a (poly)oxyethylene block and is represented by the following general formula (I). Such polymer is excellent in temperature-sensitive thickening properties. (in the general formula (I), R1 denotes a hydrogen atom or an alkyl group having a carbon number of from 1 to 8; either one of R2 and R3 is a methyl group and the other is a hydrogen atom; and 10?m?40 and 1?n?50).

Abstract: An object of the invention is to provide a polyvinyl acetal resin for thermoforming that allows providing a molded product that is excellent in thermal stability, and excellent in the heat resistance without harming the properties of the polyvinyl acetal resin, and the invention relates to a polyvinyl acetal resin for thermoforming, which is obtained by acetalization of a polyvinyl alcohol resin having a viscosity average polymerization degree of 500 to 2000 and a saponification degree of 99.5 mol % or more with aldehyde, wherein the sum of vinyl alcohol units acetalized with the aldehyde is 65 to 88 mol % with respect to the total repeating units, and the content of alkali metal or alkali earth metal is 0.1 to 50 ppm. The molar ratio of a vinyl alcohol unit acetalized with an aldehyde having four or more carbon atoms/a vinyl alcohol unit acetalized with an aldehyde having three or less carbon atoms is preferably 90/10 to 0/100.

Abstract: An acrylic thermoplastic resin composition is obtained by melt-kneading a methacrylic resin (A) and a polyvinyl acetal resin (B) at a resin temperature of not less than 140° C. while applying shear at a shear rate of 100 sec?1 or more, and then cooling the kneaded product to not more than 120° C. In the acrylic thermoplastic resin composition, at least the methacrylic resin (A) forms a continuous phase, and among glass transition temperatures of the acrylic thermoplastic resin composition, a glass transition temperature TgA P ascribed to the methacrylic resin (A) indicates a value between a glass transition temperature (TgA) of the methacrylic resin (A) alone and a glass transition temperature (TgB) of the polyvinyl acetal resin (B) alone. A film- or sheet-like molded article is obtained by molding the resin composition. An acrylic resin composite is obtained by laying a layer of metal and/or metal oxide on at least one side of the acrylic resin molded article.

Abstract: Provided is a thermoplastic acrylic resin composition comprising a methacrylic resin (A) and a polyvinyl acetal resin (B) obtained by acetalizing a polyvinyl alcohol resin with an aldehyde having 4 or more carbon atoms and an aldehyde having 3 or less carbon atoms in which the total amount of the vinyl alcohol units acetalized with the aldehyde having 4 or more carbon atoms and the aldehyde having 3 or less carbon atoms is 65 to 85 mol % of all repeating units, and the molar ratio of the vinyl alcohol unit acetalized with the aldehyde having 4 or more carbon atoms to the vinyl alcohol unit acetalized with the aldehyde having 3 or less carbon atoms is from 90/10 to 0/100. Furthermore, provided are an article molded from the thermoplastic acrylic resin composition and a method of producing the thermoplastic acrylic resin composition comprising the steps of mixing a methacrylic resin (A) and a polyvinyl acetal resin (B), increasing the resin temperature to 160° C.

Abstract: Provided is a thermoplastic polymer composition, including a thermoplastic elastomer (A) and a polyvinyl acetal (B), wherein the thermoplastic elastomer (A) is a styrene-based thermoplastic elastomer or an olefin-based thermoplastic elastomer. Thus, a thermoplastic polymer composition is provided that has good flexibility as a thermoplastic elastomer composition, is excellent in mechanical properties and formability, and also itself has excellent adhesion to a ceramic, a metal, or a polar polymer. In addition, provided is a shaped article in which the thermoplastic polymer composition is adhered to a ceramic, a metal, or a polar polymer, in particular a shaped article adhered to a glass.

Abstract: An acrylic thermoplastic resin composition is obtained by melt-kneading a methacrylic resin (A) and a polyvinyl acetal resin (B) at a resin temperature of not less than 140° C. while applying shear at a shear rate of 100 sec?1 or more, and then cooling the kneaded product to not more than 120° C. In the acrylic thermoplastic resin composition, at least the methacrylic resin (A) forms a continuous phase, and among glass transition temperatures of the acrylic thermoplastic resin composition, a glass transition temperature TgA P ascribed to the methacrylic resin (A) indicates a value between a glass transition temperature (TgA) of the methacrylic resin (A) alone and a glass transition temperature (TgB) of the polyvinyl acetal resin (B) alone. A film- or sheet-like molded article is obtained by molding the resin composition. An acrylic resin composite is obtained by laying a layer of metal and/or metal oxide on at least one side of the acrylic resin molded article.

Abstract: A thermoplastic elastomer composition comprising from 35 to 50 parts by mass of a hydrogenated block copolymer (a) having a weight-average molecular weight of from 70000 to 120000, from 30 to 50 parts by mass of a rubber softener (b) and from 5 to 25 parts by mass of a polystyrene-based resin (c) having a weight-average molecular weight of from 100000 to 400000 [provided that the total of (a), (b) and (c) is 100 parts by mass], wherein the hydrogenated block copolymer (a) is prepared by hydrogenating a block copolymer having at least two polymer blocks A mainly comprising a vinyl aromatic compound unit and at least one polymer block B mainly comprising a conjugated diene unit, and has a vinyl aromatic compound unit content of from 35 to 45% by mass, and at least 50% of the carbon-carbon double bonds derived from the conjugated diene in the polymer block B are hydrogenated.