Mitsubishi Chemical Patente

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A composition containing an ethylene-vinyl alcohol copolymer, a titanium compound, and an alkali metal compound, wherein at least a portion of the ethylene-vinyl alcohol copolymer is derived from biomass, and a mass ratio of a content of the alkali metal compound in terms of metal to a content of the titanium compound in terms of metal is from 500 to 280000 is provided as a composition excellent in thermal stability.

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As a vapor-deposited film enhanced in surface smoothness; a multilayer structure, a molded article, and a food container, each including the same; and a method for producing a vapor-deposited film, the following is provided. A vapor-deposited film including: a substrate film having a layer containing a composition containing an ethylene-vinyl alcohol copolymer and a titanium compound; and a metal vapor-deposited layer laminated on the substrate film, wherein a content of the titanium compound in terms of metal is 0.001 ppm or more and less than 3 ppm relative to a mass of the composition.

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A resin composition containing a polyvinyl alcohol resin, a titanium compound, and a compound (X), wherein the polyvinyl alcohol resin is an ethylene-modified polyvinyl alcohol resin containing from 1 to 19 mol% of an ethylene structural unit, the compound (X) is at least one selected from the group consisting of an alkaline earth metal compound (A), an alkaline metal compound (B), sorbic acid (C), and acetic acid (D), and a content of the titanium compound in terms of metal is from 0.0001 to 2 ppm relative to a mass of the resin composition is provided as the resin composition having excellent thermal stability.

Provided is a composition containing an ethylene-vinyl alcohol copolymer (A) and a titanium compound (B),the ethylene-vinyl alcohol copolymer (A) containing at least two types, which are an ethylene-vinyl alcohol copolymer (A1) and an ethylene-vinyl alcohol copolymer (A2), having different ethylene structural unit contents,a difference between the ethylene structural unit contents between the ethylene-vinyl alcohol copolymer (A1) and the ethylene-vinyl alcohol copolymer (A2) in the ethylene-vinyl alcohol copolymer (A) being 4 mol% or greater,the ethylene-vinyl alcohol copolymer (A2) having a degree of saponification of from 90 to 99.7 mol%, anda content of the titanium compound (B) in terms of metal being 0.001 × 10^-6 parts by mass or greater and less than 5 × 10^-6 parts by mass with respect to 1 part by mass of the ethylene-vinyl alcohol copolymer (A2), as a composition having an increased thermal decomposition temperature during melt molding and excellent thermal stability.

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Provided is an optical waveguide including a core portion configured to propagate light and a clad portion having a refractive index lower than that of the core portion. The clad portion has an underclad portion located on one surface of the core portion. In a shape of a cross-section of the core portion in a direction perpendicular to a light propagation direction, (i) H/L is 0.4 to 3, or (ii) a taper angle of the core portion is 50° or more and 130° or less, with the proviso that a width direction is a direction of a line along which the core portion and the underclad portion are in contact with each other, a thickness direction is a direction perpendicular to the width direction, L [µm] is a maximum length of the cross-section of the core portion in the width direction, and H [µm] is a maximum length of the cross-section of the core portion in the thickness direction, and the taper angle of the core portion is an angle formed by the underclad and a tangent line of a core side portion, drawn at its position corresponding to a length of 1/2 of the maximum length of the core portion in the thickness direction. At least one of the core portion or the clad portion is made of a cured product produced by curing an organopolysiloxane-containing composition containing an organopolysiloxane having a specific structure.

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To provide a composition having both excellent thermal stability and excellent suppression in heat-induced coloring, a composition is formed and contains: an ethylene-vinyl alcohol copolymer (A), a copolymer (B) including an ethylene structural unit and a structural unit represented by Formula (1) below, and a titanium compound (C), the content of the titanium compound (C) in the composition, in terms of metal, being 0.001 ppm by mass or greater and less than 10 ppm by mass, <img class="EMIRef" id="1fc2237f-3caf-4e71-86ab-f043e80d60f1-ia01" /> where R1 is an alkoxycarbonyl group (-COOR<A>) or an acyloxy group (-OOCR<A>), and the R<A> represents a hydrogen atom or an aliphatic hydrocarbon group having from 1 to 20 carbons.

Provided is an organopolysiloxane having a specific structure and having a polymerizable alkenyl group-containing organic group and Q unit silicon (SiO<4/2>), or a non-linear organopolysiloxane having a specific structure, having a polymerizable alkenyl group-containing organic group, and having no aromatic structure.

Provided is an organopolysiloxane for a near-infrared optical waveguide, the organopolysiloxane having an organic group containing a polymerizable alkenyl group and a siloxane unit (D unit) represented by SiO<2/2>, wherein the proportion of an aromatic group is 20 mol% or less in a total of all groups bonded to silicon atoms; or a cured product including a crosslinked structure derived from an organic group containing a polymerizable alkenyl group and a siloxane unit (D unit) represented by SiO<2/2>, the cured product having a refractive index of 1.400 or more and 1.500 or less at a wavelength of 1300 nm.

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A resin composition containing: a (meth)acrylic copolymer containing a structural unit (A) based on a specific metal atom-containing polymerizable monomer (a) and a structural unit (B) based on a specific polysiloxane block-containing polymerizable monomer (b); and an organic solvent, wherein a content of the structural unit (A) is from 5 to 35 mass%, a content of the structural unit (B) is from 35 to 75 mass%, and a content of the structural unit based on a (meth)acrylic macromonomer is less than 13 mass% relative to a total mass of all structural units constituting the (meth)acrylic copolymer, a weight-average molecular weight of the (meth)acrylic copolymer is 2000 or more and 6500 or less, and a VOC content is 500 g/L or less.

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Disclosed is a battery pack including a resin housing that stores a battery cell, a metal plate installed in the resin housing, and an adhesive sheet that bonds the resin housing and the metal plate. The adhesive sheet contains an easy-to-dismantle adhesive material. It is possible to provide a battery pack including an adhesive sheet that has good adhesiveness between a resin battery case (housing) and a cooling plate (metal plate) at the time of use, and allows the metal plate to be easily peeled off from the housing at the time of disassembly.

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A battery pack including a battery cell, a cooling plate, a battery case that houses the battery cell and the cooling plate, and an adhesive sheet that bonds the battery cell and the cooling plate. The adhesive sheet has a thermal diffusivity reduction rate represented by Formula (1) of 4.5% or more before and after heating when heated at 285°C for 5 minutes. ((thermal diffusivity before heating - thermal diffusivity after heating)/thermal diffusivity before heating) × 100 (1) The present invention can provide a battery pack including an adhesive sheet having good thermal conductivity at normal times and excellent thermal insulating properties at the time of thermal runaway, which are conflicting properties.

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