Abstract: The present invention provides a maleimide-based copolymer, a method for producing same, and a resin composition obtained using same. This maleimide-based copolymer contains 40-60 mass % of aromatic vinyl monomer units, 5-20 mass % of vinyl cyanide monomer units, and 35-50 mass % of maleimide monomer units, and is such that a 4 mass % tetrahydrofuran solution of the copolymer has a transmittance of 90% or more for light having a wavelength of 450 nm at an optical path length of 10 mm, and the residual maleimide-based monomer amount is less than 300 ppm. This maleimide-based copolymer preferably further contains 0-10 mass % of unsaturated dicarboxylic acid anhydride monomer units, and preferably has a glass transition temperature of 165° C. or higher.

Abstract: The present invention provides a maleimide-based copolymer, a method for producing same, and a resin composition obtained using same. This maleimide-based copolymer contains 40-60 mass % of aromatic vinyl monomer units, 5-20 mass % of vinyl cyanide monomer units, and 35-50 mass % of maleimide monomer units, and is such that a 4 mass % tetrahydrofuran solution of the copolymer has a transmittance of 90% or more for light having a wavelength of 450 nm at an optical path length of 10 mm, and the residual maleimide-based monomer amount is less than 300 ppm. This maleimide-based copolymer preferably further contains 0-10 mass % of unsaturated dicarboxylic acid anhydride monomer units, and preferably has a glass transition temperature of 165° C. or higher.

Abstract: The present invention provides a maleimide-based copolymer, a method for producing same, and a resin composition obtained using same. This maleimide-based copolymer contains 40-60 mass % of aromatic vinyl monomer units, 5-20 mass % of vinyl cyanide monomer units, and 35-50 mass % of maleimide monomer units, and is such that a 4 mass % tetrahydrofuran solution of the copolymer has a transmittance of 90% or more for light having a wavelength of 450 nm at an optical path length of 10 mm, and the residual maleimide-based monomer amount is less than 300 ppm. This maleimide-based copolymer preferably further contains 0-10 mass % of unsaturated dicarboxylic acid anhydride monomer units, and preferably has a glass transition temperature of 165° C. or higher.

Abstract: [Problem] To provide a cross-polymer having excellent softness, tensile properties, transparency and anti-blocking properties, and a medical single-layer tube using the same. [Solution] A cross-copolymer containing, by 75-95 mass %, main chains comprising aromatic vinyl/olefin-based copolymers comprising 8.99-15.99 mol % of aromatic vinyl monomer units, 84-91 mol % of olefin monomer units and 0.01-0.5 mol % of aromatic polyene monomer units; and by 5-25 mass %, cross-chains comprising polymers comprising aromatic vinyl monomer units; wherein, based on differential scanning calorimetry (DSC) in which the cross-copolymer is cooled to ?50° C. in a 30 mL/min nitrogen flow, then heated to 180° C. at a temperature increase rate of 10° C./min, re-cooled to ?50° C., and heated to 180° C. at a temperature increase rate of 10° C./min, the cross-copolymer has a top temperature of melting peak of 60-80° C., and a heat of fusion of 45-75 J/g, as calculated from the area of the DSC curve between ?20° C. and 130° C.

Abstract: A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Abstract: A resin composition that is transparent and excellent in weather resistance and heat resistance, and a molded article thereof are provided. According to the present invention, a transparent and highly heat-resistant resin composition, comprising: an aromatic vinyl-(meth) acrylic acid ester-unsaturated dicarboxylic acid anhydride copolymer (A); and an ultraviolet absorbing agent (B); wherein an amount of a residual unsaturated dicarboxylic acid anhydride monomer contained in the copolymer (A) is 100 ppm or less, and a content of the ultraviolet absorbing agent (B) with respect to a total amount of (A) and (B) is 0.03 to 1.0 mass %, is provided. The composition may further comprise a methacrylic resin (C) in addition to (A) and (B).

Abstract: Provided is a copolymer that has a heat resistance improvement effect, with respect to a methacrylic resin, superior to that of the prior art, while not deteriorating compatibility with the methacrylic resin. According to the present invention, provided is a copolymer comprising 45 to 75% by mass of an aromatic vinyl monomer unit, 5 to 35% by mass of a (meth)acrylic acid ester monomer unit, and 20 to 25% by mass of an unsaturated dicarboxylic anhydride monomer unit, and having a haze of 5% or less measured along an optical path length of 10 mm through a 12% by mass chloroform solution of the copolymer in accordance with JIS K-7136.

Abstract: A copolymer for optical compensation film showing a negative orientation birefringence, having excellent transparency, heat resistance, film strength, and optical properties, and is capable of obtaining a beautiful film suitable for an optical compensation film is provided. A copolymer for optical compensation film, containing: 45 to 80 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 5 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has an average number molecular weight (Mn) of 5.5×104 to 9×104 and a weight average molecular weight (Mw) of 14×104 to 20×104; and the copolymer has a haze of 1% or less, the haze being measured with a 2 mm thick sample in accordance with ASTM D1003, is provided.

Abstract: A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Abstract: [Problem] To provide a thermoplastic elastomer resin composition that excels in tensile breaking strength, softness, oil resistance and scratch resistance, and that has good heat fusion ability with respect to polyolefin resins. [Solution] A thermoplastic elastomer resin composition consisting of: 15 to 89 mass % of a cross-copolymer having a polymer consisting of aromatic vinyl monomer units as a cross-chain structure on an aromatic vinyl-olefin-aromatic polyene copolymer main chain consisting of 9.99 to 29.99 mol % of aromatic vinyl monomer units, 70 to 90 mol % of olefin monomer units and 0.01 to 0.5 mol % of aromatic polyene monomer units; 1 to 55 mass % of a hydrogenated block copolymer; and 10 to 60 mass % of a polypropylene resin.

Abstract: Provided is a copolymer for improving heat resistance of aromatic vinyl-vinyl cyanide based resin which can achieve preservation of excellent transparency of the aromatic vinyl-vinyl cyanide based resin, improvement in heat resistance, and a molded product having excellent appearance, by adding the copolymer to the aromatic vinyl-vinyl cyanide based resin. A copolymer for improving heat resistance of an aromatic vinyl-vinyl cyanide based resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Abstract: An inspection device 20 for inspecting a workpiece 100 having a stepped portion 115, comprises: a pair of electrode plates 220, 230 for nipping the workpiece 100 therebetween and applying voltage to the workpiece 100, the pair of electrode plates 220, 230 including a first electrode plate 220 to be disposed on the stepped portion side 115 and a second electrode plate 230 to be disposed on the opposite side from the stepped portion 115 of the workpiece 100; and a heat transferring member 240 to be disposed so as not to create a gap between the stepped portion 115 and the first electrode plate 220.

Abstract: Provided is a copolymer for improving heat resistance of aromatic vinyl-vinyl cyanide based resin which can achieve preservation of excellent transparency of the aromatic vinyl-vinyl cyanide based resin, improvement in heat resistance, and a molded product having excellent appearance, by adding the copolymer to the aromatic vinyl-vinyl cyanide based resin. A copolymer for improving heat resistance of an aromatic vinyl-vinyl cyanide based resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Abstract: A copolymer for improving heat resistance of a methacrylic resin which can achieve preservation of excellent transparency of the methacrylic resin and improvement in heat resistance, and can provide a molded product having excellent appearance, by adding the copolymer to the methacrylic resin, is provided. According to the present invention, a copolymer for improving heat resistance of a methacrylic resin, including: 45 to 85 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 10 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has a total light transmittance of 88% or more, the total light transmittance being measured in accordance with ASTM D1003 for a sample with 2 mm-thickness, is provided.

Abstract: A copolymer for optical compensation film showing a negative orientation birefringence, having excellent transparency, heat resistance, film strength, and optical properties, and is capable of obtaining a beautiful film suitable for an optical compensation film is provided. A copolymer for optical compensation film, containing: 45 to 80 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 5 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has an average number molecular weight (Mn) of 5.5×104 to 9×104 and a weight average molecular weight (Mw) of 14×104 to 20×104; and the copolymer has a haze of 1% or less, the haze being measured with a 2 mm thick sample in accordance with ASTM D1003, is provided.

Abstract: Provided is a maleimide copolymer which exhibits an excellent hue, an effect of imparting high heat resistance, and excellent kneadability. Specifically provided is a maleimide copolymer which comprises 50 to 60 mass % of a styrene monomer unit, 30 to 50 mass % of a maleimide monomer unit, and 0 to 10 mass % of an unsaturated dicarboxylic anhydride monomer unit, and which has a weight-average molecular weight (Mw) of 90,000 to 130,000 and a residual maleimide monomer content of 300 ppm or lower.

Abstract: Provided is a novel heat-dissipating resin composition used for an LED light housing, the composition having excellent heat dissipation, fire retardancy, insulation properties, and molding processability as well as low specific gravity and improved whiteness. Also provided is a heat-dissipating housing for LED lighting, the housing being molded using the heat-dissipating resin composition. Disclosed is a heat-dissipating resin composition used for an LED light housing, comprising: 100 parts by mass of a thermoplastic resin composition (X) comprising 40 to 65% by mass of a polyamide resin (A), 33.5 to 59.8% by mass of a metal-hydroxide-based fire retardant (B), and 0.2 to 1.5% by mass of a polytetrafluoroethylene resin (C); and 5 to 200 parts by mass of an inorganic filler (Y) comprising 5 to 100% by mass of boron nitride (D) and 0 to 95% by mass of an inorganic oxide filler (E), wherein thermal conductivity is equal to or greater than 1.0 W/m·K.

Abstract: Provided is a novel heat-dissipating resin composition used for an LED light housing, the composition having excellent heat dissipation, fire retardancy, insulation properties, and molding processability as well as low specific gravity and improved whiteness. Also provided is a heat-dissipating housing for LED lighting, the housing being molded using the heat-dissipating resin composition. Disclosed is a heat-dissipating resin composition used for an LED light housing, comprising: 100 parts by mass of a thermoplastic resin composition (X) comprising 40 to 65% by mass of a polyamide resin (A), 33.5 to 59.8% by mass of a metal-hydroxide-based fire retardant (B), and 0.2 to 1.5% by mass of a polytetrafluoroethylene resin (C); and 5 to 200 parts by mass of an inorganic filler (Y) comprising 5 to 100% by mass of boron nitride (D) and 0 to 95% by mass of an inorganic oxide filler (E), wherein thermal conductivity is equal to or greater than 1.0 W/m·K.

Abstract: Provided is a maleimide copolymer which exhibits an excellent hue, an effect of imparting high heat resistance, and excellent kneadability. Specifically provided is a maleimide copolymer which comprises 50 to 60 mass % of a styrene monomer unit, 30 to 50 mass % of a maleimide monomer unit, and 0 to 10 mass % of an unsaturated dicarboxylic anhydride monomer unit, and which has a weight-average molecular weight (Mw) of 90,000 to 130,000 and a residual maleimide monomer content of 300 ppm or lower.

Abstract: A preparation obtained by coating granules containing both a basic medical agent hydrochloride (e.g. allotinolol hydrochloride) and a polyanion the particles of which are present in the form of a discontinuous layer, with a film containing a slightly water-soluble substance, can release said agent at a controlled rate without influenced by the physiological factors of the gastrointestinal tract of a patient when orally administered.