Abstract: An object of the present invention is to provide a methacrylic resin composition which exhibits excellent flexibility, elasticity, impact resistance, and plasticity and moldability while transparency inherent to methacrylic resins is maintained. A methacrylic resin composition to be produced is composed of 10 to 99 parts by mass of a methacrylic resin (A) containing not less than 80 mass % of a methyl methacrylate unit and 90 to 1 part by mass of a block copolymer (B) containing 10 to 60 mass % of a methyl methacrylate polymer block (b1) and 90 to 40 mass % of an acrylate polymer block (b2) and having a refractive index of 1.485 to 1.495 (the total of (A) and (B) is 100 parts by mass).

Abstract: A (meth)acrylic resin composition is obtained by a method that comprises: preparing a liquid starting material (A) comprising methyl methacrylate, an acrylic acid alkyl ester and a chain transfer agent, having a mass ratio of the acrylic acid alkyl ester to the methyl methacrylate of 0/100 to 20/80, and having a dissolved oxygen concentration of not more than 50 ppm, preparing a liquid starting material (B) comprising a radical polymerization initiator, a polymerization inhibitor and methyl methacrylate, and having been maintained at a temperature of not more than 10° C. in the presence of oxygen, continuously feeding the liquid starting material (A) and the liquid starting material (B) into a tank reactor, allowing bulk polymerization to proceed in the tank reactor at a polymerization conversion ratio of 40 to 70% by mass to give a reaction product, and continuously discharging the reaction product from the tank reactor.

Abstract: Provided are a break-resistant copolymer having high transparency and heat resistance and also having a high tensile strain at break, and a molded article. A copolymer contains 80% by mass to 98% by mass of structural units derived from a methacrylic ester monomer and 2% to 10% by mass of ester structural units derived from a cyclic ketene acetal monomer. The copolymer has a weight average molecular weight of 80,000 or more and a molecular weight distribution of 1.75 to 3.80.

Abstract: A method for producing a (meth)acrylic resin composition, the method comprises the steps of continuously feeding methyl methacrylate and the other materials into a tank reactor while controlling each of the amounts thereof, performing bulk polymerization in the tank reactor to obtain a reaction product, recovering a mixture (A) containing methyl methacrylate and the others from the reaction product, and continuously feeding the mixture (A) into the tank reactor, wherein each of the amounts of methyl methacrylate and the others being fed into the tank reactor are controlled on the basis of the amount of the mixture (A) being fed into the tank reactor and the proportions of methyl methacrylate and the others in the mixture (A), and the perfect-mixing time of the tank reactor, the half life of a radical polymerization initiator at a temperature equal to the temperature inside the tank reactor, the agitation power of the tank reactor, the mean residence time of a reaction starting material in the tank reactor, an

Abstract: A film is obtained by forming a methacrylic resin composition comprising 100 parts by mass of a methacrylic resin (A) and preferably 1 to 10 parts by mass of a polycarbonate resin, the methacrylic resin (A) having a triad syndiotacticity (rr) of not less than 58%, a weight average molecular weight of 50000 to 150000, a content of fraction having a molecular weight of not less than 200000 of 0.1 to 10% by mass and a content of fraction having a molecular weight of less than 15000 of 0.2 to 5% by mass. A polarizer protective film comprising the above film is obtained.

Abstract: A methacrylic resin [1] having a triad syndiotacticity (rr) of not less than 65% and a methacrylic resin [2] having a triad syndiotacticity (rr) of 45 to 58% are melt kneaded in a mass ratio of the methacrylic resin [1]/the methacrylic resin [2] of 40/60 to 70/30, and further melt kneaded preferably with a polycarbonate resin in a ratio of 1 to 10 parts by mass of the polycarbonate resin to the total 100 parts by mass of the methacrylic resin [1] and the methacrylic resin [2] to obtain a methacrylic resin composition.

Abstract: A copolymer comprising a structural unit (I) derived from a phosphonate monomer (1) such as diethyl methacryloyloxymethyl phosphonate, diethyl 2-methacryloyloxyethyl phosphonate and the like, and a structural unit (II) derived from a radical polymerizable monomer (2) such as methacrylic acid, acrylic acid, 8-tricyclo[5.2.1.02,6]decanyl methacrylate, t-butyl methacrylate and the like, wherein the content of phosphorus atoms from the phosphonate monomer (1) is 2.0 to 6.0% by mass relative to the mass of the copolymer. A formed article comprising the copolymer.

Abstract: A methacrylic resin composition comprising 10 to 99 parts by mass of a methacrylic resin (A) comprising 80% by mass or more of a methyl methacrylate unit, and 90 to 1 part by mass of a block copolymer (B) comprising 10 to 60% by mass of a methacrylic acid ester polymer block (b1) and 90 to 40% by mass of an acrylic acid ester polymer block (b2), wherein the total of the methacrylic resin (A) and the block copolymer (B) is 100 parts by mass, wherein a weight-average molecular weight Mw(A) of the methacrylic resin (A), a maximum weight-average molecular weight Mw(b1) of the methacrylic acid ester polymer block (b1) and a maximum weight-average molecular weight Mw(b2) of the acrylic acid ester polymer block (b2) satisfy (1): 0.5?Mw(A)/Mw(b1)?2.5 and (2): 40000?Mw(b2)?120000.

Abstract: A methacrylic resin composition, comprising a methacrylic resin which comprises 50-90% by mass of a structural unit derived from methyl methacrylate and 10-50% by mass of a structural unit derived from methacrylic acid alicyclic hydrocarbon ester, wherein the difference between the yellow index (YI4) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 4 minutes and the yellow index (YI1) at an optical path length of 200 mm for an injection molded article obtained at a cylinder temperature of 280° C. and a molding cycle of 1 minute is 3 or less, and the melt flow rate at a temperature of 230° C. and under a load of 3.8 kg is 5 g/10 min or more.

Abstract: A method of producing a (meth)acrylic resin composition. The method comprises a step of continuously feeding a monomer mixture comprising 80 to 100% by mass of methyl methacrylate and 20 to 0% by mass of an alkyl acrylate to a tank reactor and bulk polymerizing the monomer mixture until obtaining a polymerization conversion of 40 to 70% by mass to prepare a reaction product; continuously discharging the reaction product, and heating the reaction product to 200° C. to 270° C. with a heater, and then separating the unreacted monomer with a extruder equipped with a vent; and transferring the separated unreacted monomer entrained by an inert gas flow to reuse the separated unreacted monomer as a raw material of the monomer mixture.

Abstract: A methacrylic resin composition, which comprises a methacrylic resin comprising 99.5% by mass or more of a structural unit derived from methyl methacrylate. The methacrylic resin includes less than 0.03 mol % of terminal double bonds based on the amount of the structural unit derived from methyl methacrylate and 0.2 mol % or more of combined sulfur atoms based on the amount of the structural unit derived from methyl methacrylate. The methacrylic resin composition has a melt flow rate of 8 g/10 min or more at 230° C. and a load of 3.8 kg.

Abstract: A method of producing a (meth)acrylic resin composition. The method comprises a step of continuously feeding a reaction raw material including a chain transfer agent, a radical polymerization initiator and a monomer mixture comprising 80 to 100% by mass of methyl methacrylate and 20 to 0% by mass of an alkyl acrylate to a tank reactor through two or more feeding ports; a step of bulk polymerizing the monomer mixture in the tank reactor until a polymerization conversion of 40 to 70% by mass to prepare a reaction product; and a step of removing the monomer mixture from the reaction product.

Abstract: A (meth)acrylic resin composition comprising not less than 99.5% by mass of (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from acrylic acid ester, wherein a difference between YI4 and YI1 is not more than 3, in which the YI4 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 4 minutes, and the YI1 is a yellowness index at optical path length 200 mm of an article obtained by injection molding of the (meth)acrylic resin composition at a cylinder temperature of 280° C. and a molding cycle of 1 minute; and the (meth)acrylic resin composition has a melt flow rate under conditions of 230° C. and 3.8 kg load of not less than 25 g/10 min.

Abstract: A (meth)acrylic resin composition comprising 99.5% by mass or more of a (meth)acrylic resin composed of 80 to 100% by mass of a structural unit derived from methyl methacrylate and 0 to 20% by mass of a structural unit derived from an acrylic acid ester, wherein the (meth)acrylic resin composition has the rate of loss on heat of 0.5%/minute or less in a nitrogen atmosphere at 300° C., and the melt flow rate of 10 g/10 minutes or more under conditions of 230° C. and 3.8 kg load.

Abstract: Provided is a stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery which composition is useful for achieving excellent high-speed charge and discharge characteristics. The stock oil composition for a carbonaceous material for a negative electrode of a lithium-ion secondary battery uses a bottom oil of residue fluid catalytic cracking apparatus as a raw material. The stock oil composition comprises, of a saturated component, an aromatic component, a resin component and an asphaltene component detectable by development of the stock oil composition using thin-layer chromatography, the saturated component ranging from 30 to 50% by weight and the aromatic component ranging from 50 to 70% by weight; and has an average molecular weight of from 400 to 600.

Abstract: There is provided a vehicle hood moving device for a vehicle having a hood movably supported at a vehicle body front. The hood moving device includes a first magnet disposed in the hood, a second magnet provided to the inside of an engine room and disposed so as to face the first magnet, a collision detecting sensor to detect that a pedestrian collides with the vehicle, and a collision predicting device to detect whether or not a pedestrian has a danger of colliding with the vehicle. When detection is made with these sensors and predicting device that a pedestrian has collided with the vehicle or has a danger of colliding with the vehicle, the hood is moved as to the vehicle body by magnetic force of the first magnet and second magnet. The second magnet is an electromagnet, and the first magnet is a permanent magnet.

Abstract: A percutaneous medication device according to the present invention comprises: a syringe into which a medical liquid is filled; and a needle formation attached to a tip of the syringe; where: the needle formation comprises a plurality of needles protruding from a surface of a tip of the needle formation; a tip of the needle is cut diagonally with respect to the longitudinal direction of the needle; a discharge opening formed at the tip of each needle is facing substantially opposite from the center direction of the needle formation; and a pitch between the adjacent needles is 1 mm to 10 mm.

Abstract: The transdermal administration device of the present invention includes: a needle support with a plurality of microneedles formed at a tip portion thereof; a holder with the needle support placed therein, allowing the needle support to protrude itself therefrom and retract therein; and a cap for covering the microneedles, and further includes: a spring member placed between the needle support and the holder, for biasing the needle support in a protruding direction; an engaging portion at a base of the needle support; and an engaged portion capable of engaging the engaging portion, formed in the holder, where the engaging portion of the needle support can be locked with the engaged portion of the holder when the needle support is retracted in the holder.