摘要:
Nitrogen compounds represented by formula (XXIa) or (XXIb); an epoxy resin hardening accelerator and a resin composition each containing any of the compounds; and an electronic part device containing an element encapsulated with the composition. In the formulae, R1 and R2 each represents hydrogen or a C1-20 monovalent organic group; R3 and R4 each represents a C1-20 divalnt organic group; R5 represents hydrogen or a C1-6 monovalent organic group; k is an integer of 0 to 2; and p is 0 or 1.
摘要:
A derivative of naphthalocyanine containing a perfluoroalkyl group and having a particular structure for ensuring excellent weather-proof properties, extremely high solubility in various solvents and capability of forming a film, and an optical recording medium prepared by using the derivative and capable of recording while using a focused beam of a semiconductor laser or the like. The derivative of naphthalocyanine containing a perfluoroalkyl group may be prepared by reacting a perfluoroalkanoyl peroxide having a particular structure with a naphthalocyanine.
摘要:
A naphthalocyanine derivative having as substituents at least one group of a formula: SR.sup.1 wherein R.sup.1 is --(CR.sup.2 R.sup.3).sub.x SiR.sup.4 R.sup.5 R.sup.6, in which R.sup.2 to R.sup.6 are H, alkyl groups, etc. is excellent in solubility in saturated hydrocarbon solvents and in absorption of semiconductor laser lights and thus, is suitable for producing optical recording media.
摘要:
An R—Fe—B sintered magnet has a structure including main phase crystal grains and a grain boundary area surrounding the crystal grains. The sintered magnet includes fluorine and a specified metal element selected from elements belonging to Group 2 through Group 16 of periodic table excepting the rare earth element, carbon and boron. The fluorine has a higher concentration in a region closer to a magnet surface than in the center. The specified element also has a higher concentration in the region closer to the surface. The sintered magnet includes oxyfluoride containing carbon, Dy and the metal element in a grain boundary area region at a distance of 1 μm or greater from the magnet surface, and the carbon has a higher concentration than the concentration of the metal element in a region at a distance of 1 μm to 500 μm from the magnet surface.
摘要:
An epoxy resin molding material for sealing which comprises an epoxy resin, an epoxy resin curing agent, and a pitch, as well as an electronic component comprising an element that is sealed with the molding material. This molding material exhibits favorable coloring properties, and even when used in packages with narrow distances between pads or wires, shorting defects caused by conductive materials can be prevented, as the molding material contains no conductive carbon black.
摘要:
A curable resin which exhibits excellent heat resistance while including an extremely smaller amount of volatile component is disclosed, and an electronic component device having excellent reliability in heat resistance and the like which contains the above curable resin is provided. A curable resin obtained in reaction of at least one compound (a) selected from the group consisting of the silane compounds represented by the following Formula (I-1) and the partial condensates thereof with a phenol compound (b), comprising a remaining volatile component in an amount of 10 wt % or less with respect to the total weight of the curable resin is used as a curing agent. [Formula 1] R1nSiR2(4-n) (I-1) (Wherein, n denotes a number of 0 to 2; R1 represent a hydrogen atom, or substituted or unsubstituted hydrocarbon groups having 1 to 18 carbon atoms; R2 represent a halogen atom, a hydroxyl group, substituted or unsubstituted oxy groups, amino groups, and carbonyloxy groups having 1 to 18 carbon atoms; and two or more of R1 and R2 may bind to each other to form a cyclic structure).
摘要:
A curing accelerator for a curing resin of the invention is represented by the following general formula (I). R1 to R3 in the formula (I) represent a hydrogen atom, or a substituted or unsubstituted hydrocarbon group having 1 to 18 carbon atoms, and each may be the same or different. Two or more of R1 to R3 may be bonded to have a ring structure. R4 to R7 represent a hydrogen atom or a substituted or unsubstituted monovalent organic group having 1 to 18 carbon atoms, and each may be the same or different. Y− represents a group in which one proton is discharged from a monovalent group having 0 to 18 carbon atoms and having at least one proton capable of being discharged. Two or more of R4 to R7 and Y− may be bonded to have a ring structure. The curing accelerator exhibits superior curability under moisture absorption, flow properties, reflow cracking resistance and high-temperature storage characteristics.
摘要:
Tetraazaporphins represented by the general formula (I): ##STR1## provide substances derived from organisms (e.g. antigens, antibodies, nucleotides, etc.) which have been labeled with a fluorochrome for labeling comprising the tetraazaporphin; reagents comprising any of the labeled substances which can be utilized for assay of various antigens, drugs, DNAs and the like; and analysis of the base sequence of DNA. Fluorescence analysis can be carried out using the labeled substances.
摘要:
2,3-dicyanonaphthalene derivatives useful in the synthesis of naphthalocyanine derivatives are disclosed. The 2,3-dicyanonaphthalene derivatives have the formula: ##STR1## wherein each R.sup.1 may be the same or different and represents an alkyl group, substituted alkyl group, or aryl group; and n is an integer from 1 to 4.