Abstract: The present invention provides an organic electroluminescence device capable of having not only a device lifetime comparable to that of an existing organic electroluminescence device but also a small thickness of smaller than 10 ?m and excellent flexibility. The present invention relates to an organic electroluminescence device having a structure including: an anode; a cathode on a substrate; and a laminate of multiple layers between the anode and the cathode, the device having a thickness of smaller than 10 ?m.

Abstract: The present invention provides an organic electroluminescence device capable of having not only a device lifetime comparable to that of an existing organic electroluminescence device but also a small thickness of smaller than 10 ?m and excellent flexibility. The present invention relates to an organic electroluminescence device having a structure including: an anode; a cathode on a substrate; and a laminate of multiple layers between the anode and the cathode, the device having a thickness of smaller than 10 ?m.

Abstract: The present invention provides a light cosmetology or light therapy light-emitting sheet having excellent conformability to the skin and excellent wearing feeling. The present invention relates to a light cosmetology or light therapy organic electroluminescence sheet used in light cosmetology or light therapy application, the organic electroluminescence sheet including an organic electroluminescence device having a structure in which multiple layers are laminated on a sheet-like flexible substrate and having a thickness of 10 to 100 ?m.

Abstract: Provided is a (meth)acrylic acid-based copolymer containing, as structural units, a structural unit derived from a sulfonic acid (salt) group-containing monomer and a structural unit derived from (meth)acrylic acid (salt), the copolymer being capable of expressing an excellent effect on the dispersion of hydrophobic particles. Also provided is a method of producing such (meth)acrylic acid-based copolymer. A (meth)acrylic acid-based copolymer of the present invention contains: 1 mass % to 20 mass % of a structural unit (a) derived from an ether bond-containing hydrophobic monomer (A) represented by a specific structure; 1 mass % to 50 mass % of a structural unit (b) derived from a sulfonic acid (salt) group-containing monomer (B) represented by a specific structure; and 30 mass % to 98 mass % of a structural unit (c) derived from (meth)acrylic acid (salt) (C).

Abstract: Provided is a (meth)acrylic acid-based copolymer containing, as structural units, a structural unit derived from a sulfonic acid (salt) group-containing monomer and a structural unit derived from (meth)acrylic acid (salt), the copolymer being capable of expressing an excellent effect on the dispersion of hydrophobic particles. Also provided is a method of producing such (meth)acrylic acid-based copolymer. A (meth)acrylic acid-based copolymer of the present invention contains: 1 mass % to 20 mass % of a structural unit (a) derived from an ether bond-containing hydrophobic monomer (A) represented by a specific structure; 1 mass % to 50 mass % of a structural unit (b) derived from a sulfonic acid (salt) group-containing monomer (B) represented by a specific structure; and 30 mass % to 98 mass % of a structural unit (c) derived from (meth)acrylic acid (salt) (C).