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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...
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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...
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JP7022113B2 |
The present invention relates to a process for producing isocyanates in process chains, each of which produce an isocyanate end product via at least one intermediate product, wherein the heat energy liberated in a first production plant ...
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JP7013372B2 |
A distillation column for separating a multicomponent mixture into at least three fractions. The distillation column has at least one separating wall and at least one material exchange element (1) above the at least one separating wall. ...
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JP2022014232A |
PURPOSE: To provide an oxygen-absorbing compound which has oxygen absorbency and generates little odor.An oxygen-absorbing compound has one or two more unsaturated five-membered rings. Any one bond between five carbon atoms which constit...
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JP6997455B2 |
Free-standing non-fouling polymers and polymeric compositions, monomers and macromonomers for making the polymers and polymeric compositions, objects made from the polymers and polymeric compositions, and methods for making and using the...
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JP2021195347A |
To provide a polyisocyanate composition excellent in storage stability, and capable of suppressing coloring of a modified body, and to provide a modified body composition obtained by modifying the polyisocyanate composition.In a polyisoc...
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JP6980949B1 |
A method for producing a polyamine compound, which comprises a first step of reacting a thiourethane resin with an amine compound A to produce a polyurea compound, and a second step of reacting a polyurea compound with an amine compound ...
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JP6952026B2 |
The invention relates to a method for preparing an aromatic polyisocyanate in an isocyanate plant comprising a reaction section for a phosgenation reaction, wherein a primary aromatic amine is reacted with phosgene compounds in a reactio...
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JP6951455B2 |
A process for preparing an isocyanate product includes providing a phosgene inlet stream and an amine in solvent inlet stream to a phosgenation mixer, the amine in-solvent inlet stream including one or more amines and one or more inert s...
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JP6940694B2 |
The present invention relates to a method for preparing an aliphatic isocyanate capable of suppressing the occurrence of side reactions and the production of by-products. The method for preparing an aliphatic isocyanate comprises a step ...
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JP2021143160A |
To provide a method for producing an isocyanate composition which can obtain an organic isocyanate having a carbodiimide group and/or a urethoneimine group having a lower color number and excellent storage stability, suppresses damage to...
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JP2021143161A |
To provide a method for producing an isocyanate composition which can obtain an organic isocyanate having a carbodiimide group and/or a urethoneimine group having a lower color number and suppressed in the increase of the color number wi...
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JP6937847B2 |
A method is provided for collecting a compound of formula (III) (in which R31 is a monovalent to trivalent organic group and n31 is an integer of 1 to 3) from a liquid phase component that is formed as a by-product in a method for produc...
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JP6932768B2 |
The invention relates to a method for producing isocyanates, according to which exhaust flows provided for the combustion are guided through an adsorption device before being supplied into the exhaust gas combustion process, and are ther...
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JP6913081B2 |
The invention relates to a method for an economically and technically improved embodiment of a production interruption in a production method for isocyanates by phosgenation of the corresponding amines, in which the entire production pla...
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JP6913083B2 |
The invention relates to a continuously operated method for producing isocyanates by reacting the corresponding amines with phosgene. When changing the target production capacity starting from a starting state with a specified production...
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JP2021095357A |
To provide a method for producing a useful carbon dioxide derivative from carbon dioxide with low energy.An amine is caused to absorb carbon dioxide, and without separating the carbon dioxide, it is then reacted with an acid catalyst and...
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JP6893927B2 |
The invention relates to the production of isocyanates by means of phosgenation of the corresponding primary amines in the gas phase, wherein the reactant flows of amine and phosgene are fed separately to a reactor through a pre-heated i...
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JP6876803B2 |
The present invention relates to a toluene diisocyanate purification method enabling acquisition of a product having a small amount of dimers in a final product by means of using a reactive dividing wall column during toluene diisocyanat...
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JP6869290B2 |
The present invention relates to a polyisocyanate composition comprising, on the basis of the total mass of the polyisocyanate composition, 97 weight % or more of a polyisocyanate, and 2.0 mass ppm or more and 1.0×10mass ppm or less of ...
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JP6856756B2 |
Provided is a method capable of preparing high-purity aliphatic isocyanate, particularly, xylylene isocyanate in a high yield in a simple manner without an additional separate process, wherein when aliphatic isocyanate is prepared using ...
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JP6843977B2 |
An isocyanate production method is characterized by having: a carbamation step in which a carbonic acid ester, an inorganic acid salt of an amino acid derivative, and a basic compound are reacted to obtain a reaction mixture containing a...
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JP2021006520A |
To provide a method for preparing a suspension of a hydrochloride of an organic amine capable of obtaining a stirrable and pumpable suspension comprising the respective hydrochloride of organic amines even at standard pressure and at tem...
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JP2021006847A |
To provide a manufacturing method of a novel spectacle lens using 5-(isocyanatomethyl) bicyclo [2.2.1] hept-2-ene.A manufacturing method of a spectacle lens that is the cured product obtained by curing a polymerizable composition includi...
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JP6804512B2 |
A method for producing isocyanates by reacting primary amines with phosgene in a stoichiometric excess in the gas phase, wherein the excess phosgene is subsequently recovered and recirculated back into the reaction. particular a method f...
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JP2020535150A |
In the present invention, the corresponding diamine precursors, urea and hydroxy compounds are converted to diurethane monomers, these diurethanes are converted to diurethane, which is a high boiling point hydroxy compound, and finally t...
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JP2020535153A |
The present invention relates to a method for producing an organic diisocyanate, wherein a diisocyanate is obtained as a distillate by cleaving the corresponding diurethane into a diisocyanate and a hydroxy compound and separating the di...
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JP6770415B2 |
To provide a method for producing a pentamethylene diisocyanate capable of preventing pentamethylenediamine hydrochloride from adhering to a stirring vessel by suppressing deterioration of the fluidity of a salt-forming mixture containin...
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JP6757468B2 |
An isocyanate production method according to the present invention is a method in which an isocyanate is produced by subjecting a carbamate to thermal decomposition, and includes: a step of preparing a mixture liquid containing the carba...
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JP6751209B2 |
This blocked isocyanate composition contains a blocked isocyanate compound that is obtained from a triisocyanate compound represented by general formula (I) and at least two blocking agents. (In general formula (I), each one of the plura...
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JP6743069B2 |
The present invention relates to a continuous process for preparing a polyisocyanate, in which a polyamine and phosgene are first converted predominantly to carbamoyl chloride and amine hydrochloride and only in minor proportions to poly...
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JP6744808B2 |
To provide a method for producing pentamethylene diisocyanate which can suppress decrease in flowability of a salt-forming mixture containing pentamethylenediamine hydrochloride in a salt-forming step and suppress adhesion of pentamethyl...
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JP6731929B2 |
The polyphenyl polymethylene polyisocyanates can further be prepared according to the invention, prior to the thermal cleavage, by removing compounds having free amino groups or urea groups present in the carbamate crude mixture from the...
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JP6728054B2 |
The invention relates to a method for preparing isocyanates by the phosgenation of the corresponding amines in which problems resulting from the formation of deposits in apparatuses of the reaction segment during activation (starting) an...
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JP6710159B2 |
The invention relates to a method for producing the isomers 1,3- and/or 1,4-xylylene diisocyanates by reacting the corresponding 1,3- and/or 1,4-xylylene diamines with phosgene in the gaseous phase.
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JP6707078B2 |
The invention relates to a method for producing 1,5-pentanediisocyanate (PDI) by reacting 1,5-pentanediamine (PDA) with phosgene in the gas phase.
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JP6705461B2 |
The present invention provides a process for producing an isocyanate compound such as 3-methyl-2-methoxymethyl-1-isocyanate benzene and the like. By reacting 3-Methyl-2-methoxymethyl aniline and the like with phosgene in the presence of ...
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JP6705905B2 |
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...
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JP6700336B2 |
The xylylene diisocyanate composition according to the embodiments has a chlorine content of 100 to 1,000 ppm to improve the stability, so that the degradation of the reactivity can be prevented even when it is stored for a long period o...
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JP6675497B2 |
The method for producing pentamethylene diisocyanate includes a reaction step, in which carbonyl chloride is allowed to react with pentamethylenediamine to produce a reaction mixture containing pentamethylene diisocyanate and a tar compo...
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JP6666459B2 |
An isocyanate composition according to the present invention contains an isocyanate compound of formula (1) and/or (2) (wherein Rrepresents a hydrogen or a monovalent organic group, and Rrepresents a monovalent organic group), and, relat...
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JP2020024453A |
To provide a xylylene diisocyanate composition for producing a resin which is excellent in yellowing resistance.An xylylene diisocyanate composition is obtained, which contains xylylene diisocyanate and chloromethylbenzyl isocyanate and ...
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JP6640274B2 |
An isocyanate composition is prepared from an amine composition, which comprises (a) 99% to less than 100% by weight of m-xylylenediamine; (b) greater than 0% to 0.5% by weight of p- xylylenediamine; and (c) greater than 0% to 0.5% by we...
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JP6641497B2 |
The present invention provides an isocyanate composition including an isocyanate compound having an ethylenically unsaturated bond, a compound represented by formula (1) (in the formula, Rrepresents an a-valent organic group, Rrepresents...
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JP6633218B2 |
The present invention provides a polyisocyanate composition that exhibits excellent water dispersibility and excellent external appearance and hardness of the resulting coating film. This polyisocyanate composition contains a polyisocyan...
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JP6626985B2 |
An isocyanate composition having a low viscosity, a water dispersibility, a drying property, and a water-resistance contains an isocyanate compound of general formula (I). In the general formula (I), A represents a residual group contain...
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JP6626986B2 |
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JP6621760B2 |
This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is started up by first charging the pl...
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JP6621759B2 |
This invention relates to a process for operating a gas phase phosgenation plant (100) to form an isocyanate (4) by reacting an amine (2) with phosgene (1), in which the gas phase phosgenation plant is shut down by first stopping the ami...
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