Abstract:
The present invention relates to a copolymer including a monomer unit (a) derived from isoprene and a monomer unit (b) derived from farnesene; a process for producing the copolymer including at least the step of copolymerizing isoprene with farnesene; a rubber composition including (A) the copolymer, (B) a rubber component and (C) carbon black; a rubber composition including (A) the copolymer, (B) a rubber component and (D) silica; a rubber composition including (A) the copolymer, (B) a rubber component, (C) carbon black and (D) silica; and a tire using the rubber composition at least as a part thereof.
Abstract:
The present invention relates to a film for flip chip type semiconductor back surface, which is to be disposed on the back surface of a semiconductor element to be flip chip-connected onto an adherend, the film containing a resin and a thermoconductive filler, in which the content of the thermoconductive filler is at least 50% by volume of the film, and the thermoconductive filler has an average particle size relative to the thickness of the film of at most 30% and has a maximum particle size relative to the thickness of the film of at most 80%.
Abstract:
PROBLEM TO BE SOLVED: To provide a curable silicone resin composition giving a cured product which has high resistance to a repeating thermal shock, hardly generates cracks even under a severe temperature cycle, has excellent discoloration resistance when exposed to high temperature for a long time and is capable of preventing permeation of gasses such as SOx and which is useful as a material, such as an LED element sealing material, for optical devices and optical components, an insulating material for electronic devices and electronic components and a coating material, and to provide a cured product of the curable silicone resin composition and an optical semiconductor device.SOLUTION: The curable silicone resin composition contains: (A) a (A-1) component or (A-1) and (A-2) components, where the (A-1) component is a compound expressed by formula (1) and has at least two aliphatic unsaturated groups in one molecule and the (A-2) component is expressed by formula (2) and is a branched or three-dimensional-network structure organopolysiloxane; (B) an organosilicon compound having at least two hydrogen atoms bonded to a silicon atom in one molecule and no aliphatic unsaturated group; (C) a hydrosilylation catalyst; and (D) silicone powder. The cured product obtained from the addition curable silicone resin composition has high resistance to the repeating thermal shock, hardly generates cracks even under the severe temperature cycle, has excellent discoloration resistance when exposed to high temperature for the long time and is capable of preventing permeation of sulfur oxide gas. As a result, the cured product is useful as a material for the optical semiconductor device to be used under a severer environment.
Abstract:
PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition that gives a molded article showing a good molding appearance and having high conductivity, flame retardancy and rigidity, and to provide a molded article having the above properties obtained by molding the resin composition.SOLUTION: A polycarbonate resin composition comprises 98.5 to 60 mass% of a polycarbonate resin (A), 1 to 30 mass% of a graphene sheet (B), and 0.5 to 20 mass% of a phosphate ester (C). A molded article is obtained by molding the resin composition.
Abstract:
An epoxy resin composition in accordance with the present invention is a one-part epoxy resin composition for hermetic sealing of an electronic component or an electrical component, containing: a liquid epoxy resin; dicyandiamide; and a filler, the filler having an average particle size between 0.1 µm and 1 µm, the filler containing particles not less than 5 µm in particle size in an amount of not more than 20 wt%, and the amount of the filler contained in the one-part epoxy resin composition being between 5 and 60 parts by weight relative to 100 parts by weight of the liquid epoxy resin. This achieves a one-part liquid epoxy resin composition in which a great variety of curing agents can be used and dissociation of an epoxy resin and a curing agent is suppressed even when used in a gap of approximately several tens of micrometers.
Abstract:
PROBLEM TO BE SOLVED: To provide a composite used as a replacement for transparent glasses such as window glass, wherein the composite has a high degree of optical transparency with minimal optical distortion within a broad temperature range and which exhibits improved impact and mechanical performances.SOLUTION: A composite article comprises a substantially transparent matrix and at least one substantially transparent organic fiber embedded within the matrix. The matrix and the organic fiber may have substantially equivalent refractive indices within a wavelength band of interest.