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JP3881046 |
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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JP2006312619 |
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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JP2006291188 |
To provide a monomer having excellent reactivity, imparting high heat resistance and high refractive index and having two or more polymerizable functional groups having different polymerization characteristics and an aromatic ring in the...
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JP3869494 |
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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JP2006282641 |
To provide a device for producing a polyisocyanate capable of treating hydrogen chloride efficiently even on having a trouble in a chlorine-producing means for producing chlorine from hydrogen chloride produced as a by-product.This devic...
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JP2006282642 |
To provide a device for producing a polyisocyanate while capable of producing chlorine stably from a by-product, hydrogen chloride, capable of reacting carbonyl chloride with a polyamine stably, and also treating the by-product, hydrogen...
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JP2006282640 |
To provide a device for continuously producing a polyisocyanate, capable of aiming at the improvement of the yield of the polyisocyanate by bringing a polyamine in contact with a carbonyl chloride quickly after their feeding in order to ...
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JP2006282660 |
To provide a method for producing a polyisocyanate, while effectively utilizing hydrogen chloride produced as a by-product in the production process of the polyisocyanate, capable of reducing the load to an environment, and a device so a...
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JP2006282666 |
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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JP2006273717 |
To improve the preservation stability and reproducibility of an isocyanate compound markedly.This method for stabilizing the isocyanate component suitably used for a synthetic resin such as a polyurethane, etc., and an optical resin such...
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JP2006248998 |
To provide a method for producing a polyisocyanate by which the load on the environment can be reduced while effectively utilizing hydrogen chloride by-produced in a polyisocyanate production process.Carbonyl chloride is produced by feed...
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JP2006232797 |
To provide a method for producing an isocyanate group-having (meth)acrylate derivative, by which an isocyanate group-having 3-chloropropionate derivative is dehydrochlorinated in profitable mild conditions to produce the isocyanate group...
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JP2006225385 |
To provide a method for producing diphenylmethane-based diamine and polyamine (MDA), by which the diphenylmethane-based diamine and polyamine can simply and economically be produced, while saving the employment of aniline produced by hyd...
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JP2006206593 |
To provide 2,4'-MDI containing minute amounts of 2,2'-MDI.The method comprises the following process: An isomeric starting mixture of diisocyanato-diphenylmethanes comprising 2,2'-diisocyanato-diphenylmethane, 2,4'-diisocyanato-diphenylm...
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JP2006169243 |
To provide a method for producing a pale liquid mixture of organic isocyanates with storage stability having carbodiimide groups and/or uretonimine groups, capable of forming the liquid mixture of the isocyanates with a low color number ...
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JP2006160684 |
To provide an organic polyisocyanate composition having improved storage stability, to provide a method for producing the organic polyisocyanate, to provide an adhesive composition, and to provide a coating composition.The organic polyis...
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JP3806916 |
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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JP3804689 |
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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JP3796610 |
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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JP3795115 |
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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JP2006104135 |
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...
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JP2006104166 |
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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JP2006069941 |
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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JP2006057073 |
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...
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JP2006036778 |
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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JP2006028037 |
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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JP2006022098 |
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...
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JP2006022100 |
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....
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JP2006002153 |
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...
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JP2005336190 |
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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JP2005320334 |
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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JP2005298365 |
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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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...
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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...
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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...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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