Kuraray Co., Ltd.

Mitsui Chemicals, Inc.

Kurray Co., Ltd.

Tatsuya Oshita

Manabu Shibata

Wataru Hirose

Kentaro Yoshida

Ryoichi Sasaki

Mamoru Omoda

Goki Uehara

Osamu Kazeto

Atsuhiro Nakahara

Takehiro Miyamoto

Hiroshi Kawai

Masakazu Nakaya

Nahoto Hayashi

Yukiatsu Komiya

Kouta Isoyama

Yasuhiro Nonaka

Shigeki Takada

Shogo Nakazawa

Noboru Higashida

Hiroyuki Ono

Syuichi Kanao

Ryohei Shiga

Naoki Kawakami

Kanenori Ito

Hidekazu Saitou

Yoshiki Takeda

Nobuhisa Senda

Kazuhira Hata

Suehiko Nagano

Provided are: a multilayer structure having a strong initial interlayer adhesive force, with a decrease of the interlayer adhesive force being prevented even in a case of use in a harsh environment such as exposure to hot water, an acid, or an alkali for a long period of time; a method for producing such a multilayer structure; and a sheet for preventing diffusion of hazardous substances, a landfill geomembrane, and a multilayer pipe, each including such a multilayer structure.

Multilayer structure, method for producing same, sheet for preventing diffusion of hazardous substances, landfill geomembrane, and multilayer pipe

The present disclosure provides a laminate having a gas barrier layer and a polyurethane layer.

Laminate

The composite structural material of the present invention includes a base (X) and a layer (Y) stacked on the base (X). The layer (Y) includes a reaction product (R) of a metal oxide (A) and a phosphorus compound (B). In the infrared absorption spectrum of the layer (Y) in the range of 800 to 1400 cm, the wave number (n) at which the infrared absorption reaches maximum is in the range of 1080 to 1130 cm.

Method for producing composite structural material

Provided are a novel multilayer structure that can be used to protect a device and a device using the multilayer structure. The disclosed multilayer structure is a multilayer structure including a substrate and a barrier layer stacked on the substrate. The 3% strain tension of the substrate in at least one direction is at least 2000 N/m. The barrier layer contains a reaction product (R). The reaction product (R) is a reaction product formed by a reaction at least between a metal oxide (A) and a phosphorus compound (B). In an infrared absorption spectrum of the barrier layer in a range of 800 to 1400 cm, a wavenumber (n) at which maximum infrared absorption occurs is in a range of 1080 to 1130 cm. A metal atom constituting the metal oxide (A) is essentially an aluminum atom.

Multilayer structure, device using the same, method for producing the multilayer structure, and method for producing the device

The method disclosed includes: a step (I) of preparing a dispersion liquid (S) including an aluminum compound (A); a step (II) of mixing the dispersion liquid (S) and a predetermined phosphorus compound (B) so as to prepare a coating liquid (U); a step (III) of applying the coating liquid (U) onto the base (X) so as to form a precursor layer of the layer (Y); and a step (IV) of subjecting the precursor layer to heat treatment at a temperature of 110&#xb0; C. or more so as to form the layer (Y). The aluminum compound (A) can be formed by adding an acid to a solution including an aluminate. The number of moles (N) of aluminum atoms derived from the aluminum compound (A) and the number of moles (N) of phosphorus atoms derived from the phosphorus compound (B) satisfy 0.8&#x2266;(N)/(N)&#x2266;4.5.

Composite structure, method for producing same, packaging material and formed product using same, and coating liquid

A blow molded container including (A) a layer containing an ethylene-vinyl alcohol copolymer as a principal component, in which the layer (A) contains an unsaturated aldehyde, and the content of the unsaturated aldehyde in the layer (A) is 0.01 ppm or more and 100 ppm or less. The unsaturated aldehyde (II) is preferably an unsaturated aliphatic aldehyde. The unsaturated aldehyde (II) is preferably at least one selected from the group consisting of crotonaldehyde, 2,4-hexadienal and 2,4,6-octatrienal. The layer (A) preferably contains a conjugated polyene compound, and the content of the conjugated polyene compound in the layer (A) is preferably 0.01 ppm or more and 1,000 ppm or less.

Blow molded container, fuel container, and method for producing blow molded container

A composite structure disclosed includes a base (X) and a layer (Y). The layer (Y) includes a mixture of a metal oxide (A), a phosphorus compound (B), and a compound (L) (silicon compound). Examples of the phosphorus compound (B) and the compound (L) include a compound containing a site capable of reacting with the metal oxide (A). When the number of moles of metal atoms (M) derived from the metal oxide (A) is denoted by Nand the number of moles of Si atoms derived from the compound (L) is denoted by N, 0.01&#x2266;N/N&#x2266;0.30 is satisfied. When the number of moles of phosphorus atoms derived from the phosphorus compound (B) is denoted by N, 0.8&#x2266;N/N&#x2266;4.5 is satisfied.

Composite structure, packaging material and formed product using same, production methods thereof, and coating liquid

A composite structure disclosed includes a base (X) and a layer (Y) stacked on the base (X). The layer (Y) includes a reaction product (R). The reaction product (R) is a reaction product formed by a reaction at least between a metal oxide (A) and a phosphorus compound (B). A peak for a binding energy of an oxygen-atom 1s orbital observed by X-ray photoelectron spectroscopy of the layer (Y) is located at 532.0 eV or higher, and the peak has a half width of less than 2.0 eV.

Composite structure, product using same, and method for producing composite structure

The gas barrier layered product of the present invention includes a base and a gas barrier layer stacked on the base. The gas barrier layer is formed of a composition that includes the hydrolyzed condensate of at least one type of compound (L) containing a hydrolyzable characteristic group, and a polymer (X) containing at least one functional group selected from a carboxyl group and a carboxylic acid anhydride group. At least part of &#x2014;COO&#x2014; group contained in the functional group of the polymer (X) is neutralized and/or reacted with a compound (P) containing at least two amino groups. At least part of the &#x2014;COO&#x2014; group of the polymer (X) is neutralized with a metal ion having a valence of at least two. The ratio of [the equivalent amount of the amino groups contained in the compound (P)]/[the equivalent amount of the &#x2014;COO&#x2014; group of the polymer (X)] is in the range of 0.2/100 to 20.0/100.

Gas barrier layered product and method for producing the same

Composite structural material formed product and packaging material using the same, method for producing the composite structural material, and coating liquid

The layered product of the present invention has a base, and a gas barrier layer stacked on the base. The gas barrier layer is formed of a composition that includes a hydrolyzed condensate of a compound (L) containing a hydrolyzable characteristic group, and a neutralized product of a polymer (P) containing at least one functional group selected from the group consisting of carboxyl group and carboxylic acid anhydride group. The compound (L) includes a compound (L) and a compound (L). The compound (L) and the compound (L) each contains a silicon atom to which the hydrolyzable characteristic group is bonded. The compound (L) contains an organic group having amino group. The compound (L) does not contain an organic group having amino group. At least part of the &#x2014;COO&#x2014; group in the at least one functional group contained in the polymer (P) is neutralized with a divalent or higher valent ion (E) of a metal element that has a higher electronegativity than calcium.

Layered product, packaging material and formed product using the same, and method for producing the layered product

A resin composition, contains: a thermoplastic polyurethane (A); a thermoplastic polyurethane (B); and an ethylene-vinyl alcohol copolymer (C), wherein an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (A) is greater than a hydroxyl group content (mole) therein, an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (B) is nearly equal to a hydroxyl group content (mole) therein, and the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C) have a mass ratio (B/C) of from 70/30 to 99/1 and a content of the thermoplastic polyurethane (A), based on 100 parts by mass of a total of the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C), is from 1 to 30 parts by mass. Thus, a resin composition is provided that contains thermoplastic polyurethanes and an ethylene-vinyl alcohol copolymer and is good in melt shapability.

Resin composition and multilayered structure

The gas barrier layered product of the present invention includes a base and a gas barrier layer. The gas barrier layer is formed of a composition that includes a hydrolyzed condensate of a compound (L) and a neutralized product of a polymer (X) containing a carboxyl group or a carboxylic acid anhydride group. The compound (L) includes a specific compound (A) that contains M(Al, Ti, or Zr) to which a hydrolyzable characteristic group is bonded and a specific compound (B) that contains Si to which a hydrolyzable characteristic group is bonded. At least part of &#x2014;COO&#x2014; group of the polymer (X) is neutralized with a metal ion having a valence of at least two. At least 80 mol % of the compound (B) is a compound expressed by a specific formula. The ratio of [the number of moles of Min the compound (A)]/[the number of moles Si in the compound (B)] is in the range of 0.1/99.9 to 30.0/70.0.

The formed product of the present invention is a formed product selected from the group consisting of a vertical form fill seal pouch, a container cover and a vacuum packaging pouch. The formed product is formed using a gas barrier layered product. The gas barrier layered product includes a base, and at least one layer with gas barrier properties that is stacked on the base. The layer is formed of a composition that includes a hydrolyzed condensate of a compound (L) and a neutralized product of a polymer (X) containing a carboxyl group or a carboxylic acid anhydride group. The compound (L) includes a compound (A) that contains M(Al, Ti or Zr) to which a hydrolyzable characteristic group is bonded and a compound (B) that contains Si to which a hydrolyzable characteristic group is bonded. At least part of &#x2014;COO&#x2014; group of the polymer (X) is neutralized with a metal ion having a valence of at least two. At least 80 mol % of the compound (B) is a compound expressed by a specific formula. The ratio of [the number of moles of Min the compound (A)]/[the number of moles Si in the compound (B)] is in the range of 0.1/99.9 to 35.0/65.0.

Formed product

Provided is a paper container having a window and being formed of a laminate that includes at least a paper layer and a gas barrier laminate, the paper layer having a cutout part for the window, the cutout part being covered with the gas barrier laminate, and the gas barrier laminate including a substrate and a gas barrier layer laminated on at least one surface of the substrate, wherein the gas barrier layer is formed of a composition containing a polymer having at least one functional group selected from a carboxyl group and a carboxylic anhydride group, and wherein &#x2014;COO&#x2014; groups contained in the at least one functional group are neutralized at least partly with a metal ion having a valence of two or more.

Growing community of inventors

Kurashiki, Japan

Tatsuya Oshita