Abstract: A composition includes (A) an olefin-aromatic vinyl compound-aromatic polyene copolymer, (B) boron at a content of 0.2 ppm or more as measured by ICP-emission spectroscopy in accordance with JIS K0116: 2014, and (C) aluminum at a content in the range of 100 ppm or more and 2000 ppm or less as measured by ICP-emission spectroscopy in accordance with JIS K0116: 2014, the composition having a number-average molecular weight of 40000 or smaller.

Abstract: Provided is a novel copolymer having excellent low dielectric properties in an uncured state, exhibiting a high elastic modulus at room temperature. An ?-olefin-cyclic olefin-aromatic polyene copolymer has, in an uncured state, a dielectric constant of less than 2.4 and a dielectric tangent of less than 0.0008 at a measurement frequency of 40 GHZ, and a storage modulus of 1000 MPa or more as measured at 25° C.

Abstract: To achieve both excellent dielectric properties and long-term durability. A composition comprising (A) a curable hydrocarbon-based resin, (B) a phenolic antioxidant, (C) a thioether-based antioxidant, and (D) a phosphorus-based antioxidant, wherein a total amount of substance of the components (B), (C), and (D) is within a range of 2 to 10 mmol, based on 100 g of the mass of the component (A) in the composition.

Abstract: A multilayer structure includes at least one insulating layer(s), at least one resin layer(s), and at least one copper foil(s) each having a smooth surface and a roughened surface, wherein the insulating layer contains an olefin-aromatic vinyl compound-aromatic polyene copolymer and a surface modifier, wherein the resin layer contains one or more selected from the group consisting of polyimide, liquid crystal polymer, polyphenylene ether, polyfunctional aromatic vinyl resin, epoxy resin, and the same composition as in the insulating layer, wherein at least one surface of the respective insulating layer(s) is bonded to a smooth surface of the copper foil, and wherein, for each respective resin layer: at least one surface of the resin layer is bonded to the roughened surface, and the resin layer is not bonded to the smooth surface; or both surfaces of the resin layer are not bonded to the copper foil.

Abstract: A composition that serves as a binder for a positive electrode with a good balance between suppression of battery performance degradation at a high-capacity electrode, high-temperature storage property, and DC resistance, a slurry for a positive electrode using the composition, a positive electrode, and a secondary battery. A free induction decay curve of the composition obtained by measuring at 180° C. by Solid Echo method using pulse NMR is separated into three components, component S180, component M180, and component H180, a component ratio of the component S180 is 10% or more and 80% or less, and a relaxation time of the component S180 is 500 ?s or more.

Abstract: A composition, serving as a binder with a good balance between suppression of battery performance degradation at a high-capacity electrode, high-temperature storage property, and DC resistance, a slurry for a positive electrode using the composition, a positive electrode, and a secondary battery. The composition includes a graft copolymer, wherein: the graft copolymer has a stem polymer and a branch polymer; the stem polymer contains a polyvinyl alcohol structure, the branch polymer contains a first monomer unit containing a (meth)acrylonitrile monomer unit and/or a (meth)acrylic acid monomer; the composition has a swelling rate to an electrolytic solution of 105 to 200% at 25° C. for 15 days; the swelling rate is a swelling rate after immersing the composition in the electrolytic solution at 25° C. for 15 days; and the electrolytic solution is obtained by mixing ethylene carbonate and diethyl carbonate at a volume ratio of 1:2.

Abstract: A composition including a graft copolymer, wherein the graft copolymer has a stem polymer and a branch polymer; the stem polymer contains a polyvinyl alcohol structure, the branch polymer contains a first monomer unit containing a (meth)acrylonitrile monomer unit and/or a (meth)acrylic acid monomer; the composition has a gel fraction of 30% or more; the gel fraction is represented by following formula: the gel fraction %=A×100/1; A g is an insoluble content left on a filter pater when 1 g of the composition is added to 300 ml of dimethyl sulfoxide to obtain a mixture and the mixture is stirred at 60° C. for 15 hours and then filtered through the filter paper, which is a No. 5C filter paper as specified in JIS P 380.