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Matches 451 - 500 out of 2,023

Document Document Title
JP2023541640A
[Problem] Instead of proceeding with the above-mentioned complicated process to reduce chlorinated derivatives, the chlorinated derivatives produced in the general process are converted to non-chlorinated derivatives through a simple red...  
JP2023131089A
To provide an episulfide compound composition that exhibits improved storage stability and can control the polymerization rate in the preparation process of an optical material, and the heat resistance of the optical material, and provid...  
JP2023538842A
[Solution] The present invention contains monomeric diphenylmethane diisocyanate (MDI) as component (q1), and an amide with a molecular weight of less than 200 g/mol as component (q2), the total of components (q1) and (q2) being 100% by ...  
JP7331611B2
To provide: a novel isocyanate compound; an isocyanate composition, a polymerizable composition, a polymer, a lens and a coating agent that are based on the isocyanate compound; and a production method of the isocyanate compound.The inve...  
JP2023115018A
To provide a xylylene diisocyanate composition, a modified xylylene diisocyanate composition, and a polymerizable composition, which enable stable production of resin excellent in yellowing resistance and transparency, and to provide res...  
JP7323724B2
Provided is an isocyanate production system 1 comprising a control device 10 that chooses energy generated by a biomass boiler 134, biomass methanol or carbon recycled methanol for use in a methanol decomposition device 150, a recycled o...  
JP7322293B2
Disclosed is a 1,3-bisisocyanatomethylcyclohexane composition and an optical resin prepared therefrom. The composition comprises, based on the weight of 1,3-bisisocyanatomethylcyclohexane, a) 65%-95wt% of trans-1,3-bisisocyanatomethylcyc...  
JP2023104999A
To provide a container that contains xylylene diisocyanate with sufficiently low colorability, a storage method of xylylene diisocyanate and a transport method of xylylene diisocyanate.In a xylylene diisocyanate-containing container 1 co...  
JP7315585B2
The invention relates to a process for the preparation of aliphatic, cycloaliphatic or araliphatic isocyanates by reacting at least one primary organic amine with a stoichiometric excess of phosgene in the gas phase, comprising the steps...  
JP2023092840A
To provide a production method of an isocyanate, with which the isocyanate can stably and continuously be produced in a high yield in producing the isocyanate without using phosgene.In a production method of an isocyanate, a carbamate co...  
JP2023091331A
To provide a production method of an isocyanate, which uses a carbamate as a raw material, in which a side reaction is suppressed and which has a high yield.A production method of an isocyanate is a method for producing an isocyanate by ...  
JP2023526598A
The present invention continuously converts an isocyanate by converting a primary amine A with phosgene P in the liquid phase in the presence of a solvent L while maintaining a stoichiometric excess of phosgene to the amino groups of the...  
JP7289990B2
[Solving Means]A xylylene diisocyanate composition contains a xylylene diisocyanate and a compound having retention time of 14.0 minutes to 14.6 minutes when the xylylene diisocyanate composition is measured by gas chromatography mass sp...  
JP7285924B2
Disclosed is a method for preparing an isocyanate in a gaseous phase, comprising feeding, in the presence or absence of an inert gas, an amine-containing gas stream and a phosgene-containing gas stream into a reaction region, allowing th...  
JP7276341B2
The invention is related to a composition excellent in stability during storage and excellent stability during utilization, and related to a method of producing the composition. The composition comprises a compound (A) represented by gen...  
JP7276342B2
A composition is provided including a compound (A) represented by Formula (1) and a compound (B) represented by Formula (2), wherein the compound (B) is contained in an amount of 0.00002 to 0.2 parts by mass with respect to 100 parts by ...  
JP7240568B2
[Problem]To provide a xylylene diisocyanate composition, a polymerizable composition for an optical material, a resin, a molded article, an optical element, and a lens capable of stably producing a resin having excellent heat resistance....  
JP7239953B2
The objective of the present invention is to provide a method for producing a carbonyl halide efficiently to the used halogenated methane. The method for producing a carbonyl halide according to the present invention is characterized in ...  
JP2023036548A
To provide a xylylene diisocyanate composition and an optical polymerizable composition including the same that allow manufacture of an optical lens having high transmittance and improved optical uniformity.A xylylene diisocyanate (XDI) ...  
JP7227973B2
The present invention relates to a plant for preparing a purified isomeric monomer from a mixture of different isomeric monomers, wherein the plant comprises a distillation apparatus, which comprises:a) a distillation column including a ...  
JP7218311B2
The invention relates to a method for operating a production plant for producing a chemical product (1) by reacting a H-functional reactant (2) with phosgene (3) during an interruption in production when taking at least one plant part of...  
JP7199547B2
There are provided a method of producing a carbonyl compound by a flow type reaction, including introducing a triphosgene solution, a tertiary amine solution, and an active hydrogen-containing compound solution into flow channels differe...  
JP2023500262A
The present invention synthesizes phosgene (20) from at least carbon monoxide (21) and chlorine (22) (1); and hydrogen chloride (25); providing a carbon dioxide gas stream (31); and cleaning (4) the carbon dioxide gas stream (31) of addi...  
JP7199546B2
There are provided a method of producing a carbonyl compound by a flow type reaction, including introducing a triphosgene solution into a flow channel (I), bringing the triphosgene solution into contact with a solid catalyst immobilized ...  
JP7194822B2
Disclosed is a method for preparing isophorone diisocyanate. The method comprises the following steps: (1) reacting isophorone with hydrogen cyanide in the presence of a catalyst to obtain isophorone nitrile; (2) reacting the isophorone ...  
JP2022550763A
The present invention relates to a process for the distillative purification of crude isocyanates obtained by phosgenation of the corresponding isocyanates in a distillation apparatus under vacuum to obtain the corresponding isocyanates,...  
JP2022547814A
The present invention is a process for producing isocyanates by using (A) an amine and a stoichiometric excess of phosgene (a) as a diluent during the reaction and/or (b) the reaction of the amine with phosgene. (referred to as quench) a...  
JP2022170318A
To provide a method for producing an isocyanate in high purity and yield, while suppressing contamination by by-products in a purification step.The present invention discloses a method for obtaining an isocyanate represented by general f...  
JP7165508B2
To provide a production method of isocyanate for producing isocyanate continuously by suppressing a side reaction.A production method of isocyanate is a method for producing isocyanate by pyrolysis of carbamate. The method includes a pyr...  
JP7165509B2
To provide a method for producing isocyanate that suppresses a side reaction and continuously produces isocyanate.The present invention provides a method for producing isocyanate by pyrolysis of carbamate, the method including: a pyrolys...  
JP7157810B2
An embodiment relates to an isocyanate composition with improved stability and reactivity and a plastic optical lens using the same. The isocyanate composition has improved stability since the content of chlorine in the composition is ad...  
JP7155125B2
The industrial scale preparation of isocyanates gives rise to distillation bottom streams that are in need of further workup. These distillation bottom streams still also contain, as well as a distillation residue consisting of compounds...  
JP7144540B2
The present invention relates to a method for preparing aliphatic isocyanate. More specifically, the present invention relates to a high purity isocyanate preparation method that can effectively recover unreacted materials and recycle th...  
JP2022540452A
The present invention relates to a process for producing polyisocyanates with low monomer content, said process comprising the steps of: (i) modifying at least one monomeric diisocyanate to contain at least one polyisocyanate and unreact...  
JP7126218B2
The diisocyanate composition according to an embodiment of the present invention comprises, in the composition, a benzyl isocyanate having a methyl group in an amount of 5 ppm to 200 ppm, an aromatic compound having a halogen group in an...  
JP7126217B2
The diamine composition according to an embodiment of the present invention comprises a benzylmonoamine having a methyl group in an amount of 10 ppm to 2,000 ppm in the composition. When it is used for the preparation of a diisocyanate c...  
JP2022118791A
To provide a xylylene diisocyanate monomer composition, and a xylylene diisocyanate-modified composition capable of imparting excellent wettability to a coating raw material while suppressing generation of gel, and capable of imparting e...  
JP7114109B2
The present invention is directed to processes for producing isocyanates and isocyanate derivatives from epoxide and carbon monoxide reagents. In preferred embodiments, the processes include a step for providing carbonylation of an epoxi...  
JP7111505B2
To provide a method for producing pentane diisocyanate, capable of suppressing generation of a chlorine derivative, and improving yield of pentane diisocyanate.The method for producing pentane diisocyanate comprises: supplying pentane di...  
JP7107986B2
An isocyanate composition according to the present invention contains: a difunctional or more-functional isocyanate compound; and 1.0 ppm by mass to 1.0 × 10ppm by mass, based on the isocyanate compound, of a compound having at least on...  
JP7103879B2
A xylylenediisocyanate composition including xylylenediisocyanate and a compound represented by Chemical Formula (1) below, wherein 0.6 ppm or more and 60 ppm or less of the compound represented by Chemical Formula (1) below is contained:  
JP2022532067A
The present invention comprises a method for purifying at least one isocyanate selected from the group consisting of aliphatic, alicyclic and aromatic aliphatic isocyanates and mixtures thereof, from aliphatic, alicyclic and aromatic ali...  
JP7098653B2
A process for preparing an aromatic isocyanate by direct carbonylation of a nitro aromatic compound by reacting the nitro aromatic compound with carbon monoxide in the presence of a catalyst, characterized in that the catalyst contains a...  
JP7093183B2
Methods for the preparation of diisocyanates by the reaction of the corresponding primary diamines with phosgene in the gas phase are described, wherein the pressure in the diamine evaporation chamber during the transfer of the diamine i...  
JP2022526915A
The present invention comprises a drying device that evaporates volatile components from the starting material to be dried, a process for producing isocyanate using this drying device, distillation residual distribution, oil-impregnated ...  
JP2022078234A
To provide a method of producing carbamate, and a method of producing isocyanate.A method for producing carbamate includes the following process (1) and process (2): (1) the process of producing a compound (A) having an urea bond at a te...  
JP7071280B2
Disclosed is to a method for producing xylylene diisocyanate (XDI), in particular meta-xylylene diisocyanate (mXDI), including the following steps: a) phosgenation of xylylene-diamine (XDA), in particular m-xylylene-diamine (mXDA) in the...  
JP7064408B2
To provide: a composition capable of forming a thermoconductive sheet excellent in thermal conductivity in the film thickness direction; a thermoconductive sheet excellent in thermal conductivity in the film thickness direction; and a de...  
JP7060697B2
Disclosed is a light colored modified isocyanate mixture and a preparation method thereof. The method comprises the following steps: a) reacting isocyanate groups of a raw material isocyanate under the action of a phospholenecatalyst, an...  
JP2022519285A
The phenylisocyanate is removed from the solvent stream obtained from the MDI and / or PMDI production process by reaction in the presence of a carbodiimidization catalyst to form the corresponding N, N'-diphenylcarbodiimide. The N, N'-d...  

Matches 451 - 500 out of 2,023