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JP2007332096A |
To provide a method for storing and/or transporting a diphenylmethane-based isocyanate composition by which excellent storage stability in low temperature region is achieved and a polyurethane resin having desired various properties afte...
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JP2007326854A |
To provide a process for coupled production of chlorine and isocyanates in which the diluted sulfuric acid used for both the processes can be returned to one or both of chlorine production and nitration reaction regardless of the operati...
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JP3997440B2 |
Acyl isocyanates are prepared by reaction of oxalyl chloride with an N-trialkyl silyl carboxamide or an N,N-bis(trialkyl silyl) carboxamide.
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JP2007223997A |
To provide a method for producing an aliphatic isocyanate containing an oxyalkylene group, capable of being utilized industrially, in which the oxyalkylene group-containing aliphatic isocyanate can efficiently be obtained in high yield. ...
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JP3957396B2 |
To suppress the formation of tars as a by-product and the discoloration of a reactional solution and produce an isocyanate compound useful in applications such as optical materials or a coating materials in a high yield by feeding phosge...
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JP2007191479A |
To provide a method for producing a light-colored isocyanate. A light-colored isocyanate is produced by reacting an mine or a mixture of two or more kinds of amines with phosgene containing less than 100 ppm of sulfur in an elemental or ...
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JP2007520460A |
Methods and reagents for rhodium-promoted carbonylation via isocyanate using carbon-isotope labeled carbon monoxide are provided. The resultant carbon isotope labeled compounds are useful as radiopharmaceuticals, especially for use in Po...
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JP3920360B2 |
PURPOSE: To provide a polyisocyanate enabling the production of a polyurethane resin coating having excellent film properties and a blocked polyisocyanate. CONSTITUTION: The polyisocyanate, having 4.5-10 of average number of isocyanate f...
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JP3901244B2 |
To produce a crude MDI having an isocyanate content as high as possible, a total chlorine content as low as possible and an iodine color number as low as possible and excellent in storage stability by minimizing the shortcomings of the p...
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JP2007077039A |
To provide a method for the crystallization of crude polyisocyanate capable of producing a highly purified product to be purified from crude polyisocyanate in high yield and provide a crystallization apparatus to perform the crystallizat...
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JP2007051092A |
To provide an efficient method for producing an aliphatic isocyanate containing an oxyalkylene group, capable of being utilized industrially.This method for producing the aliphatic isocyanate containing the oxyalkylene group is provided ...
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JP3881046B2 |
To provide a method for regulating a metal content, especially iron content in diphenylmethanediisocyanate or a diphenylmethanediisocyanate-based polyisocynate mixture. This method for reducing an iron content in diphenylmethanediisocyan...
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JP2007016047A |
To provide an isocyanate compound that can be used as a surfactant.The compound has formula I. In the formula, Iso is an isocyanate after removing one isocyanate group or a residue of a polyisocyanate, E is an element such as P or the li...
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JP2007008828A |
To provide a preparation method of an acrylic ester and/or a methacrylic ester being reduced in the content of a side reaction product.In the preparation method of an acrylic ester and/or a methacrylic ester by heating a reaction materia...
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JP3869494B2 |
To obtain a triisocyanate free from any mechanical problem, by phosgenation of the corresponding triamine under specific conditions without the need of using a large quantity of solvent. In obtaining this compound of formula I [R is a 1-...
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JP2006348030A |
To provide a method for producing 4,4'-diphenylmethane diisocyanate(4,4'-MDI) free of drawbacks involved in prior arts through enabling raw materials suitable for producing the 4,4'-MDI, e.g. a suitable MDI mixture, to be transported fro...
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JP3864209B2 |
PCT No. PCT/EP95/04354 Sec. 371 Date May 12, 1997 Sec. 102(e) Date May 12, 1997 PCT Filed Nov. 6, 1995 PCT Pub. No. WO96/16028 PCT Pub. Date May 30, 1996Isocyanates are prepared by a continuous process by reacting appropriate primary ami...
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JP2006312619A |
To provide a method for producing a polyisocyanate by which a reaction liquid can be circulated in a circulation line without installing a particular solution-sending means, and the removal of hydrogen chloride from the reaction liquid c...
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JP2006282666A |
To provide a simple and economic process for preparation of diphenylmethane based di- and/or polyamine in which the formation of undesirable isomers, homologues or by-products is prevented or suppressed.The invention relates to the proce...
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JP3833702B2 |
Polycarbamates of a polyisocyanate and secondary alcohols are disclosed. These carbamates are characterized in being readily pyrolyzed to form the corresponding polyisocyanate and alcohol with low formation of tars and other by-products....
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JP3806916B2 |
To obtain a polyisocyanate highly including uretdione groups by carrying out the uretdionization in a specific organic solvent suppressing the isocyanulation. The compound is obtained by using (A) a linear aliphatic diisocyante (preferab...
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JP3804689B2 |
To obtain a hardly colored urethane-based resin having a urethane or a thiourethane structure in the system by treating a polyisocyanate compound in the presence of oxygen. The preserving treatment of a polyisocyanate compound, especiall...
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JP3801653B2 |
Hydrazine derivatives of the formulawherein Y is CO or SO2; R1 is lower alkyl, lower alkenyl, lower cycloalkyl, lower cycloalkyl-lower alkyl, aryl or aryl-lower alkyl; R2 is lower alkyl, halo-lower alkyl, aryl-lower alkyl, aryl-lower alk...
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JP3795115B2 |
To provide a method for producing a polyisocyanate blocked with 3,5-dimethylpyrazole, and capable of omitting the necessity of the separate production of a blocking agent and handling of the same as a solid. This method for producing a p...
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JP3796610B2 |
To provide a simple method for producing an organic isocyanate excellent in heat stability at slight risk and provide a method for improving heat stability of the organic isocyanate. This method for producing an organic isocyanate compri...
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JP2006104166A |
To provide a method of reducing a hydrolyzable chlorine in a crude diphenylmethane diisocyanate up to 0.03% or lower in a short time.The problem is solved by the method of purifying the crude diphenylmethane diisocyanate characterised in...
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JP2006069941A |
To provide a method for decomposing isocyanate-based compounds and a method for recovering the decomposed materials in order to solve problems in which a mixture of isocyanate-based compounds has no utility value and the mixture has been...
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JP2006036778A |
To provide a multi-process method for continuously producing an alicyclic diisocyanate in a state free from phosgene.This multi-process method for continuously producing the alicyclic diisocyanate is characterized by performing the forma...
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JP2006028037A |
To provide a non-yellowing novel blocked alicyclic polyisocyanate compound and an alicyclic polyisocyanate compound which can be utilized as polyurethane raw materials for elastomers, coating materials, adhesives and the like.The blocked...
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JP2006503785A |
Process for preparing chlorine from hydrochloric acid, which comprises the steps: a) providing a hydrochloric acid feed stream I; b) providing a hydrochloric acid recycle stream II; c) separating off a hydrogen chloride stream IV from th...
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JP3734827B2 |
Esters that are liquid at room temperature are used as solvents for isocyanates and/or isocyanurates and allow the viscosity of the isocyanates and/or isocyanurates to be drastically reduced.
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JPWO2004022527A1 |
The present invention has a general formula (I) in which the change in hue (APHA) is 20 or less when stored for 2 weeks at 40 ° C under a nitrogen atmosphere and light-shielding conditions.(In the formula, R represents a lower alkylene)...
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JP2005336190A |
To provide an improved method for the continuous multi-process production of an alicyclic diisocyanate not containing phosgene.This method for the continuous multi-process production of the alicyclic diisocyanate, comprising reacting an ...
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JP2005320334A |
To provide an improved multiple process method for continuously producing an alicyclic diisocyanate.In the multiple process method for continuously producing an alicyclic diisocyanate by reacting an alicyclic amine with a carbonic acid d...
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JP3712295B2 |
To provide a curing agent composition containing an active methylene type blocked polyisocyanate having a high heat stability and an excellent hue, a process for producing the same and a one-package thermosetting composition excellent in...
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JP2005298365A |
To provide an organic polyisocyanate composition which effectively prevents discoloration, more specifically an organic polyisocyanate composition which effectively inhibits discoloration even with time and at elevated temperatures.The o...
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JP2005200406A |
To provide a method for easily and efficiently producing an acryloyl azide from acrylic acid which may have a substituent at an α-carbon atom or its acid anhydride, and a method for easily and efficiently producing an N-vinylisocyanate ...
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JP3674010B2 |
To industrially obtain the subject high-purity compound y simultaneous ly distilling out an organic solvent and p-phenylene diisocyanate obtained by cold two-stage phosgenation process under reduced pressures followed by concen trating t...
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JP3674642B2 |
To obtain an isocyanate useful as a raw material for paints in high yield and selectivity with side reactions suppressed. In the presence of a catalyst such as triphenyltin acetate, a carbamate such as 1,4-bit(methoxycarbonylamino)butane...
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JP2005170793A |
To obtain an organic polyisocyanate composition remarkably stable for a long period owing to effective suppression of discoloration of the organic polyisocyanate composition even under time dependent and heated environment, and provide t...
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JP2005120088A |
To provide a method for manufacturing a diamine and a polyamine of diphenylmethane series which employs an aniline and a formaldehyde simultaneously manufactured as starting materials.The method for manufacturing the diamine and the poly...
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JP2005068146A |
To provide a multi-stage method for continuously producing an alicyclic diisocyanate.This method comprises synthesizing a diurethane by reacting an alicyclic diamine and an alcohol with urea and/or a urea derivative, removing low-boiling...
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JP2005507309A |
A chemical reactor and method of using the same. The reactor comprises first and second micro-engineered discrete flow passages for receiving chemical fluids. The first fluid passage receives a first chemical fluid in which a chemical ch...
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JP2005068148A |
To provide an improved method for producing an alicyclic diisocyanate.This multi-stage method for continuously producing the alicyclic diisocyanate comprises forming a diurethane by two processes, thermally decomposing the diurethane fro...
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JP2005047854A |
To provide an organic polyisocyanate composition containing a specific phenolic compound, to provide a stabilizer composition for organic polyisocyanate comprising the specific phenolic compound and an organic phosphite, more specificall...
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JP2004347598A |
To provide an improved method for determining the isomer composition of isocyanate isomer mixtures.In the method for determining the isomer composition of isocyanate isomer mixtures, the actual isomer composition of the isocyanate isomer...
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JP2004534636A |
A process is proposed for the distillation or reactive distillation of a mixture that includes at least one toxic component, the process being carried out in a column containing a structured packing, having at least one packing layer ( 1...
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JP2004529255A |
A process for the continuous production of a polyisocyanate involving feeding a diisocyanate and an adduct containing at least one active hydrogen atom into a mixing zone, reacting the feedstocks to produce a polyisocyanate in an incline...
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JP2004262835A |
To obtain an aromatic isocyanate by synthesizing an aromatic urethane by reaction between a diaryl carbonate and an aromatic amine by a simple and economical method practicable on an industrial scale and free of drawbacks involved in pri...
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JP2004231522A |
To provide a method for synthesizing 3-bromo-5-nitrotoluene by which the synthetic time is shortened.The method for synthesizing the 3-bromo-5-nitrotoluene is carried out as follows. 2-Methyl-4-nitroaniline is reacted with bromine in ace...
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