摘要:
A metal-based composite material comprising aluminium or an aluminium alloy combined with a whisker of aluminium borate represented by the chemical formula of 9Aℓ₂O₃·2B₂O₃ or 2Aℓ₂O₃·B₂O₃ has excellent mechanical properties such as high tensile strength and great hardness.
摘要翻译:包含由化学式9A l 2O3.2B2O3或2A12O3B2O3表示的铝硼酸铝晶须的铝或铝合金的金属基复合材料具有优异的机械性能,例如高拉伸强度和高硬度。
摘要:
Disclosed is a positively chargeable toner comprising, as a charge-controlling agent, an acid adduct, metal complex or derivative of a 2-alkylimidazole represented by the following formula: wherein R₂ stands for an alkyl group having 11 through 17 carbon atoms, and R₄ stands for a hydrogen atom or a methyl group. In this toner, a high charge-controlling effect is attained with a small amount of the charge-controlling agent, and since the charge-controlling agent has a white color or light color, this toner is advantageously used as an electrostatic photographic toner for the color printing.
摘要:
An aluminium borate whisker having a composition of 9Al₂O₃·2B₂O₃ or 2Al₂O₃·B₂O₃ is formed by reacting under heating at least one aluminum-supplying component selected from the group consisting of hydroxides and inorganic salts of aluminum and at least one boric acid-supplying component selected from the group consisting of oxides, oxyacids, and their alkali metal salts of boron in the presence of at least one flux selected from the group consisting of alkali metal chlorides, alkali metal sulfates and alkali carbonates.
摘要:
Imidazole compounds of formula (I) wherein R is an alkyl group having up to 17 carbon atoms or a phenyl group and A is hydrogen are useful as curing agent or curing accelerator for epoxy resins, and can be produced by hydrolizing the acyl derivative wherein is RCO-.
摘要:
New fungicidal compounds have the formula: wherein A 1 is phenyl, halophenyl, thienyl or halothienyl, and A 2 is phenyl or halophenyl. Acid addition salts e.g. hydrochloride are disclosed. The compounds can be obtained by reacting an imidazole with a benzaldehyde of the formula A 2 -CHO.
摘要:
The disclosure relates to a novel compound 4,4'-methylene-bis-(2-ethyl-5-methyl imidazole) represented by the structural formula a method of producing the novel compound characterized by subjecting formaldehyde or a methylenizing agent to thermal reaction with 2-ethyl-4-methyl imidazole in the presence of a catalyst; and a method of curing an epoxy compound and a method of accelerating curing the epoxy compound and a method of inhibiting crystallization of 2-ethyl-4-methyl imidazole, respectively by use of the new compound.
摘要:
Disclosed is a process for the synthesis of 2-vinyt-4, 6-diamino-S-triazine having the following structural formula: which comprises heating an imidazolyl-S-triazine compound represented by the following general formula: wherein
R 1 stands for a hydrogen atom, a methyl group or an ethyl group, and R 2 stands for a hydrogen atom or a methyl group, or an isocyanuric acid-addition product thereof under reduced pressure in the presence of a polymerization inhibitor.
According to this process, 2-vinyl-4,6-diamino-S--triazine can be manufactured at a low cost on an industiral scale.
摘要:
An epoxy resin composition comprising an epoxy resin, either 2-vinyl-4,6-diamino-s-triazine or 2-vinyl-4,6-diamino--s-triazine/isocyanuric acid adduct, and at least one compound selected from dicyanidamide, polyvinyl-p-phenol and specific imidazole compounds is useful, for example, in inks, insulating paints and adhesives for printed circuit base boards and in copper-clad laminated boards.
摘要:
The invention provides a mercaptoalkylglycoluril represented by the general formula (I):
wherein R 1 and R 2 each independently represent a hydrogen atom, a lower alkyl group, or a phenyl group; R 3 , R 4 , and R 5 each independently represent a hydrogen atom or a mercaptoalkyl group selected from a mercaptomethyl group, a 2-mercaptoethyl group, and a 3-mercaptopropyl group; and n is 0, 1, or 2. The invention further provides an epoxy resin composition comprising an epoxy resin and the mercaptoalkylglycoluril, and a method for producing a laminate or a multilayer printed circuit board using the same.
摘要翻译:本发明提供由通式(I)表示的巯基烷基甘脲:其中R 1和R 2各自独立地表示氢原子,低级烷基或苯基; R 3,R 4和R 5各自独立地表示氢原子或选自巯基甲基,2-巯基乙基和3-巯基丙基的巯基烷基; 并且n为0,1或2.本发明还提供了包含环氧树脂和巯基烷基甘脲的环氧树脂组合物,以及使用其的叠层或多层印刷电路板的制造方法。