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Patent Searching and Data


Matches 401 - 450 out of 855

Document Document Title
JP2005247787
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...  
JP3712295
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...  
JP2005225879
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...  
JP2005220137
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...  
JP2005200406
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 ...  
JP2005179361
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...  
JP2005170793
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...  
JP2005126437
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...  
JP3674010
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...  
JP3674642
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...  
JP2005120092
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...  
JP2005120088
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...  
JP2005068147
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...  
JP2005068148
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...  
JP2005068146
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...  
JP2005068097
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...  
JP2005060392
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...  
JP2005060393
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 ...  
JP2005047854
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...  
JP2005041874
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...  
JP2004347598
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...  
JP2004331667
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...  
JP2004262892
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...  
JP2004262835
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...  
JP2004250453
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...  
JP2004231521
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 ...  
JP2004231522
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...  
JP2004217743
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 ...  
JP2004175888
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...  
JP2004168778
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...  
JP2004155685
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...  
JP2004155761
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...  
JP2004155760
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 ...  
JP2004143173
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...  
JP2004123666
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...  
JP2004123745
To obtain a higher throughput and cooling efficiency by quenching a reaction mixture in order to prevent thermal cracking of a diisocyanate and formation of by-products caused by heating in a reaction to form the diisocyanate by reacting...  
JP2004123746
To provide a method for production of a polyisocyanate of diphenylmethane series.This method comprises a step (a) reacting aniline and formaldehyde in the presence of HCl to convert to a product mixture containing a polyamine of the diph...  
JP2004107334
To provide a method for producing an isocyanate compound having less discoloration industrially advantageously.This method for producing the isocyanate compound by introducing phosgene into an organic solvent solution of a carbonate salt...  
JP2004099523
To provide a polymeric MDI having good reactivity, containing little impurities such as an acid component and a hydrolyzable chlorine, having very superior hue obtained by decoloring the discolored one, and hardly allowing the progress o...  
JP2004067669
To produce an isocyanate in a gas phase by reducing the changes in temperature with time and ununiformity of temperature distribution.This method for producing diisocyanate and/or triisocyanate by performing the reaction of phosgene with...  
JP2004059920
To provide an industrially simple and secure method for producing polyisocyanate based on diphenylmethane, with low color valency.The method for production of diphenylmethane based polyamine comprising a step (a) reacting aniline and for...  
JP3518052
PURPOSE: To obtain an organic isocyanate significantly reduced in discoloration by bleaching a discolored organic isocyanate with an ozone-contg. gas. CONSTITUTION: (A) A discolored organic isocyanate, pref. crude one, bottom one or modi...  
JP2004035429
To provide a method for crystallizing an isomer of a polyisocyanate by feeding a mixture of isomers of the polyisocyanate to a crystallizer to shorten a time for crystallization and separating the isomer while keeping the quality and the...  
JP2004035491
To provide an apparatus for producing an aromatic polyisocyanate with which the aromatic polyisocyanate can be obtained stably over a long period by preventing the formation of a fixedly deposited material in a heat exchanger and the plu...  
JP2004035490
To provide an apparatus for producing an aromatic polyisocyanate by which the aromatic polyisocyanate can be obtained stably over a long period by preventing the formation of a fixed material in a heat exchanger and the plugging of a pip...  
JP2004035492
To provide an apparatus for producing an aromatic polyisocyanate with which a phosgenation reaction can be stably carried out over a long period in the production of the aromatic polyisocyanate; and to provide a method for producing the ...  
JP2004035489
To provide an apparatus for producing an aromatic polyisocyanate by which the aromatic polyisocyanate is obtained stably over a long period by preventing plugging of a pipe in a heat exchanger; and to provide a method for producing the a...  
JP2004018507
To provide a method for producing an isocyanate having an isopropenyl group or a vinyl group, useful as a raw material for widely used polymers such as a urethane modifier, a raw material for plastic resins and the like.The method for pr...  
JP2004010613
To provide a method for production of 5-nitro-3, 4-dihydro-1(2H)-naphthalenone, 1, 5-naphthalenediamine and 1, 5-naphthalene diisocyanate.The producing method comprises a step converting 4-(2-nitrophenyl)-n-butyronitrile to 4-(2-nitrophe...  
JP3506758
PURPOSE: To obtain a new heterocyclic compound by reacting a (2-alkyl)acryloyl isocyanate with an azomethine-based compound and facilitate treatment of the (2-alkyl)acryloyl isocyanate by dissolving the new heterocyclic compound in a sol...  

Matches 401 - 450 out of 855