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Matches 401 - 450 out of 873

Document Document Title
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...  
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...  
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...  
JP2006104135A
To provide a new aromatic diisocyanate which can give a polymer stretchable and rich in restoring force.This is a compound expressed by general formula (1) in which R shows independently a hydrogen atom or a 1-4C lower alkyl group, and n...  
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...  
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...  
JP2006057073A
To provide a method for producing a methylene-crosslinked polyphenylene polyisocyanate with simply and effectively suppressing discoloration of the same.The method is to react a polyamine mixture generated by condensation reaction of ani...  
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...  
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...  
JP2006022098A
To provide a method capable of setting a desired reaction temperature by minimum expense concerning a production apparatus and avoiding undesirable formation of precipitate and a secondary product in a reactor in the method for producing...  
JP2006022100A
To provide a method for simply and economically producing a polyamine of a diphenylmethane series in which an acid catalyst can be utilized in a degree of protonation of <15% without separating a reaction mixture into a two phase system....  
JP2006002153A
To provide an improved process for production of carbodiimide-modified organic isocyanate, preferably a polymethylenepolyphenyl isocyanate, and most preferably diphenylmethane diisocyanate.This process comprises (1) neutralizing acidic i...  
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 ...  
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...  
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...  
JP2005247787A
To provide a method for producing an isocyanate compound having less coloring, industrially advantageously.This method for producing the isocyanate compound by introducing phosgene into an organic solvent solution of the carbonate salt o...  
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...  
JP2005225879A
To produce a mixture of methylene diphenyl diisocyanate (MDI) isomers having a high 2,4'-MDI content, while being decreased in amounts of components, such as 2,2'-MDI, a residual solvent, and phenyl isocyanate, to such an extent as not t...  
JP2005220137A
To provide a diphenylmethasne-based diisocyanate and a polyisocyanate each having a regulated and specific value of an acid component, and to provide a simple method for producing a mixture thereof.The method comprises (a) reacting anili...  
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 ...  
JP2005179361A
To provide a gas-phase method for producing a di- or triisocyanate that can quickly and sufficiently mix a diamine and phosgene in a reactor without moving an internal structure of the reactor and prevent polymer impurities and cake from...  
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...  
JP2005126437A
To provide a process for preparing an isocyanate in the gas phase significantly improving mixing of reactants by improvement of a reaction condition using a hydrodynamic means such as increasing the turbulence, etc.The process for prepar...  
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...  
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...  
JP2005120092A
To provide a new polyisocyanante blocked with a secondary amine and derived from a straight-chain aliphatic amine, capable of giving such an organic solution thereof as to have stability for a long period and not to show a tendency towar...  
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...  
JP2005068147A
To provide a multi-stage method for continuously producing an alicyclic diisocyanate without containing phosgene.This multi-stage method for continuously producing the alicyclic diisocyanate comprises synthesizing an alicyclic diurethane...  
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...  
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...  
JP2005068097A
To provide an optical material having high heat-resistance and balanced Abbe number and refractive index.The compound is expressed by general formula (1) (k is an integer of 0-2; and n is an integer of 0-1 provided that k and n are not z...  
JP2005060392A
To provide a stabilized (meth)acryloyloxyalkyl isocyanate, its stabilization method, and its production method; especially, to provide a (meth)acryloyloxyalkyl isocyanate having a low hydrolyzable chlorine content and a high storage stab...  
JP2005060393A
To provide a method for producing a high-purity (meth)acryloyloxyalkyl isocyanate having a very low hydrolyzable chlorine content.After a (meth)acryloyloxyalkyl isocyanate containing hydrolyzable chlorine is brought into contact with an ...  
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...  
JP2005041874A
To provide a method for producing a mixture of diphenylmethane-based diisocyanates and polyisocyanantes.This method comprises (a) producing diphenylmethane-based diamines and polyamines including bicyclic methylenediphenyldiamines by rea...  
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...  
JP2004331667A
To distill a mixture of isomeric diisocyanatodiphenylmethanes composed of at least 2,2'-diisocyanatodiphenylmethane, 2,4'-diisocyanatodiphenylmethane and 4,4'-diisocyanatodiphenylmethane.The mixture of isomeric diisocyanatodiphenylmethan...  
JP2004262892A
To provide a method of producing an isocyanate compound by which the isocyanate compound can be produced at a high pyrolysis rate and in a high yield with a high selectivity.A carbamate compound is pyrolyzed in the presence of at least o...  
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...  
JP2004250453A
To provide a method for phosgenation of a (poly)amine, in which high yield and long life of a reactor are achieved.This method for producing a diisocyanate of the formula (I) OCN-R-NCO comprises heating a corresponding vapor diamine of t...  
JP2004231521A
To provide a method for synthesizing 3-chloro-5-nitrotoluene according to mild reaction conditions.The method for synthesizing the 3-chloro-5-nitrotoluene is carried out as follows. 2-Methyl-4-nitroaniline is reacted with a chlorinating ...  
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...  
JP2004217743A
To provide a method for manufacturing a blocked aromatic isocyanate compound which does not injure the activities of a hydrogenating catalyst.The aromatic isocyanate is blocked in two steps: a first step for blocking an isocyanate group ...  
JP2004175888A
To provide a polyisocyanate composition which excels in the stability to moisture in a humid environment and in a closed vessel.The isocyanurate group-containing polyisocyanate composition has a phosphorus concentration of 0.1-20 ppm. Th...  
JP2004168778A
To provide a manufacturing method of obtaining a desired alicyclic isocyanate with a high selectivity.The method comprises reacting an aromatic isocyanate with hydrogen in the presence of a supported catalyst containing ruthenium alone a...  
JP2004155685A
To provide a polyisocyanate having a reduced color number.This method for producing the polyisocyanate, comprising reacting phosgene with a polyamine obtained by the polycondensation of aniline with formaldehyde, is characterized by pass...  
JP2004155761A
To provide an improved method for recovering and refining toluene diisocyanate.This method for refining toluene diisocyanate is provided by reboiling a bottom product of a downstream side distillation column or a feed sent to the downstr...  
JP2004155760A
To provide an improved method for recovering and refining toluene diisocyanate.This method for refining toluene diisocyanate from unrefined distillation feed containing toluene diisocyanate, an organic solvent and ≤2 wt. % phosgene is ...  
JP2004143173A
To provide an improved method for recovery and purification of toluene diisocyanate (TDI).The method for purification of the TDI is carried out by (a) fractionating the crude distillation feed containing less than 2% by weight of phosgen...  
JP2004123666A
To provide a method for producing a benzene derivative derived from biomass, and to obtain an aromatic polymer using the benzene derivative as a raw material, and to provide a method for producing the aromatic polymer in which all raw ma...  

Matches 401 - 450 out of 873