摘要:
A method for the preparation of Con-BAN, in which Con-AN is reacted with bromine in the presence of a Lewis acid catalyst and the solution of Con-AN and bromine are supplied simultaneously at a given rate into a reactor in which halogenated hydrocarbon and iron catalysts are previously introduced, and reacted to prepare Con-BAN.
摘要:
A radiation-resistant high molecular composition is disclosed, which comprises a high molecular polymer, a halogenated acenaphthylene and/or condensate thereof represented by the following general formula [I] (wherein X indicates a chlorine or bromine atom, a indicates 0 to 2, b indicates 1 to 6 and n indicates an integer not less than 1), a diphenyl ether derivative represented by the following general formula [II] (wherein R₁ and R₂ indicate a hydrogen atom, an alkyl, alkoxy, phenyl phenoxy, diphenyloxy or a terphenyloxy group) and/or a basic lead compound.
摘要:
A radiation-resistant high molecular composition is disclosed, which comprises a high molecular polymer, a halogenated acenaphthylene and/or condensate thereof represented by the following general formula [I] (wherein X indicates a chlorine or bromine atom, a indicates 0 to 2, b indicates 1 to 6 and n indicates an integer not less than 1), a diphenyl ether derivative represented by the following general formula [II] (wherein R₁ and R₂ indicate a hydrogen atom, an alkyl, alkoxy, phenyl phenoxy, diphenyloxy or a terphenyloxy group) and/or a basic lead compound.
摘要:
A novel poly(arylene ether sulfone) having a sulfoalkoxy group, which has both of heat resistance and electroconductivity, is suitable as polymer electrolyte membranes used for high performance polymer electrolyte fuel cells, and does not use fluorine so that loads to the environment are small in the synthesis or disposal, a process of producing the same, and a polymer electrolyte membrane comprising the same. The poly(arylene ether sulfone) having a sulfoalkoxy group has a structural unit represented by the formula (1) mentioned hereinabove, and is produced by reacting a poly(arylene ether sulfone) having a hydroxyl group with a specific alkali metal compound and/or an organic base compound, followed by reacting with a specific sulfonating agent and then with a specific acid. A polymer electrolyte membrane is produced by film formation of the polymer.
摘要:
A flame-retardant engineering plastic composition comprising (A) 100 parts by weight of an engineering plastic, (B) from 1 to 30 parts by weight of a heat-expandable graphite, and (C) from 1 to 30 parts by weight of red phosphorus and/or (D) from 1 to 30 parts by weight of a phosphorus compound.
摘要:
A method for producing 4,4′-dibromobiphenyl, which comprises reacting biphenyl and from 2 to 3 mol times, relative to biphenyl, of bromine in a halogenated hydrocarbon solvent in the presence of a catalyst which is a simple substance of an element selected from the group consisting of antimony, titanium, tin and zinc, or a compound of the element.
摘要:
A fire-retardant polymer composition is provided which comprises 100 parts by weight of a polymer such as polystyrene, 1 to 30 parts by weight of heat-expandable graphite, and 1 to 30 parts by weight of a phosphorus compound. The polymer composition is fire-retardant, and emits less smoke and less corrosive gas on burning.