Abstract: An extrusion pelletizer for a polycarbonate resin includes: an extruder; a cooling unit; and a cutter. The extruder includes a cylinder top, a first adapter, a polymer filter unit, a second adapter, and a die head. The polymer filter unit includes a plurality of stick-shaped filter elements therein. A temperature of the second adapter is set to be lower than a temperature of the polymer filter unit. The cooling unit and the cutter are disposed under an atmosphere in which air cleanliness defined in accordance with JIS B9920 is any one of class 1 to class 7.

Abstract: A water-soluble metalworking oil agent is provided by blending the following components A, B, C and D: (A) at least one of a condensed fatty acid obtained by dehydration-condensing a ricinoleic acid, and a condensed fatty acid obtained by dehydration-condensing a monovalent carboxylic acid with an alcoholic hydroxyl group of a condensed fatty acid obtained by dehydration-condensing a ricinoleic acid; (B) an ester compound provided by a dehydration condensate of a monovalent or multivalent alcohol and a monovalent carboxylic acid; (C) an amine compound; and (D) water. A blend ratio of the component A is 10 mass % or more of a total amount of the oil agent and a blend ratio of the component B is 5 mass % or more of the total amount of the oil agent.

Abstract: An anthracene derivative represented by general formula (I): wherein X and Y represent a trifunctional aromatic ring group or the like, A1 to A4 represent an aryl group or a monovalent heterocyclic group, R1 to R16 represent hydrogen atom, a halogen atom, cyano group, nitro group, alkyl group or the like, Q represents an arylene group or the like and p represents 0, 1 or 2; and an organic electroluminescence device which comprises at least an organic light emitting layer disposed between a pair of electrodes and the above anthracene derivative. The novel anthracene derivative exhibits a high efficiency of light emission and excellent heat resistance when the derivative is used as a material constituting an organic electroluminescence device.