Abstract: Provided is a thermoplastic elastomer composition obtained by melt-kneading (A) an ethylene/?-olefin/non-conjugated polyene copolymer rubber that is a copolymer of ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, (B) a polyolefin resin and (C) a mineral oil-based softening agent in the presence of (D) a crosslinking agent, at least part of the ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) being crosslinked, the thermoplastic elastomer composition having a sea-island structure in which the ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) is dispersed as a dispersed phase (island phase) in a continuous phase (sea phase) of the polyolefin resin (B), and when a cross-section of the composition is observed with an atomic force microscope (AFM), a ratio of (b) a local elastic modulus of the continuous phase to (a) a local elastic modulus of the dispersed phase being from 10 to 30.

Abstract: Provided is a thermoplastic elastomer composition obtained by melt-kneading an ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) that is a copolymer of ethylene, an ?-olefin having 3 to 20 carbon atoms, and a non-conjugated polyene, a polyolefin resin (B), and a mineral oil-based softening agent (C) in the presence of an organic peroxide (D) and a crosslinking aid (E), the thermoplastic elastomer composition having a shear viscosity of from 5 Pa·s to 20 Pa·s at 140° C. and 10,000 s?1.

Abstract: Provided is a thermoplastic elastomer composition obtained by melt-kneading (A) an ethylene/?-olefin/non-conjugated polyene copolymer rubber that is a copolymer of ethylene, an ?-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, (B) a polyolefin resin and (C) a mineral oil-based softening agent in the presence of (D) a crosslinking agent, at least part of the ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) being crosslinked, the thermoplastic elastomer composition having a sea-island structure in which the ethylene/?-olefin/non-conjugated polyene copolymer rubber (A) is dispersed as a dispersed phase (island phase) in a continuous phase (sea phase) of the polyolefin resin (B), and when a cross-section of the composition is observed with an atomic force microscope (AFM), a ratio of (b) a local elastic modulus of the continuous phase to (a) a local elastic modulus of the dispersed phase being from 10 to 30.

Abstract: A binder composition for an electrode of an electric storage device is provided. The binder composition comprises (A) at least one polymer selected from the group consisting of polyamic acids and imidized polymers thereof having an imidization rate of 50% or less and (B) water. The ratio Ma/Mb of the content of the polymer (A), Ma (parts by mass), to the content of the water (B), Mb (parts by mass), ranges from 500 to 5,000. The binder composition for an electrode of the present invention provides an electric storage device having a large charge/discharge capacity and a low degree of capacity degradation due to repetition of a charge/discharge cycle.

Abstract: An electrical storage device electrode includes a collector, and an active material layer that is formed on a surface of the collector, the active material layer including at least a polymer and an active material, and the active material layer having a polymer distribution coefficient of 0.6 to 1.0 and a density of 1.3 to 1.8 g/cm3.

Abstract: A binder composition for an electrode of an electric storage device is provided. The binder composition comprises (A) at least one polymer selected from the group consisting of polyamic acids and imidized polymers thereof having an imidization rate of 50% or less and (B) water. The ratio Ma/Mb of the content of the polymer (A), Ma (parts by mass), to the content of the water (B), Mb (parts by mass), ranges from 500 to 5,000. The binder composition for an electrode of the present invention provides an electric storage device having a large charge/discharge capacity and a low degree of capacity degradation due to repetition of a charge/discharge cycle.