4 results about "Cyclohexylisocyanate" patented technology

This invention belongs to the field of cycloazinone preparation technology, and provides a high-yield cycloazinone synthesis process, including the following steps: Step 1: N-ethoxycarbonyl-N,N,N-trimethylguanidine and a solid-phase catalyst are added to toluene and stirred evenly. Under nitrogen protection, the temperature is raised to 40-60°C, and a cyclohexyl isocyanate toluene solution is added dropwise. Stirring is continued for 2-4 hours. The solid-phase catalyst is recovered by filtration, and the mixture is concentrated under reduced pressure to obtain N-cyclohexylcarbamoyl-N-ethoxycarbonyl-N,N,N-trimethylguanidine; Step 2: Under nitrogen protection, the temperature is raised to 50-60°C, and the N-cyclohexylcarbamoyl-N-ethoxycarbonyl-N,N,N-trimethylguanidine toluene solution is added dropwise to a sodium methoxide toluene solution and stirred for 1-2 hours. The temperature is lowered to room temperature, and glacial acetic acid is added for neutralization. After washing, the mixture is concentrated under reduced pressure, and a crystallizing agent is added. The temperature is lowered to 0-5°C, and the mixture is stirred for crystallization for 2-4 hours. After filtration and washing, the mixture is dried under vacuum to obtain the finished cycloazinone.

The present disclosure relates to an organic polymerizable composition, and polymerized products and optical articles prepared therefrom. The composition comprises (a) an isocyanate-functional prepolymer and (b) an aromatic diamine having at least one primary amino group. The prepolymer (a) is prepared from a reaction mixture comprising: (i) a polyisocyanate component comprising (1) an aliphatic polyisocyanate having at least one primary isocyanate functional group and at least one secondary isocyanate functional group; and (2) a 4, 4 '-methylene bis (cyclohexyl isocyanate); and (ii) a polyol component. The composition further includes a photochromic compound, which may be present in the reaction mixture that forms the prepolymer. A method of reducing opacity of an optical article is also provided.

The invention discloses a method for detecting cyclohexyl isocyanate in a gliquidone raw material medicine. Diethylamine is adopted for derivation, cyclohexyl isocyanate and diethylamine are subjected to a derivation reaction, and the residual quantity of the impurity cyclohexyl isocyanate in the gliquidone raw material medicine is detected through a liquid chromatography-mass spectrometry method. The method has high system applicability, has incomparable advantages in specificity, quantitation limit, detection limit, linear range and repeatability, and has high precision.

The present invention provides: a sodium ion secondary battery (NIB) having excellent cycling characteristics, which are regarded as important for secondary batteries to be mounted on vehicles including electric vehicles; and an electrolytic solution with which such sodium ion secondary battery can be produced. A sodium ion secondary battery according to the present invention is characterized by comprising a positive electrode, a negative electrode, a separator, and a nonaqueous electrolytic solution comprising a nonaqueous solvent and a supporting salt dissolved therein, and is also characterized in that the positive electrode comprises a material including a sodium composite oxide, the negative electrode comprises a material including hard carbon, and the nonaqueous electrolytic solution contains at least one member selected from among perfluorobenzene, perfluorobenzene methanesulfonate, 1,3-bis(isocyanatomethyl)cyclohexane, 4,4'-diphenylmethane diisocyanate, 4,4'-methylenebis(cyclohexyl isocyanate), 1,3-bis(isocyanatomethyl)benzene, 1,3-bis(2-isocyanato-2-propyl)benzene, and methyl fluorosulfonate, in an amount more than 0.01 wt% but not more than 5 wt%.