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Patent Searching and Data


Matches 601 - 650 out of 873

Document Document Title
JPH08283211A
To economically and advantageously fractionate and purify the subject mixture with a good separation efficiency under mild conditions by recycling and extracting the aromatic polyamine mixture in the multi-stage extraction in a two-phase...  
JPH08283213A
To readily fractionate and separate the subject mixture with a god separation efficiency by extracting an aromatic polyamine mixture with a two-phase system comprising a specific solvent phase and an aqueous phase according to the counte...  
JPH08283210A
To readily fractionate and purify the subject mixture and produce isomers in the pure form or in the enriched form with a good separation efficiency by recycling and extracting the aromatic polyamine mixture in the multi-stage extraction...  
JPH08283214A
To readily fractionate and separate the subject mixture with a good separation efficiency by extracting an aromatic polyamine mixture with a two-phase system comprising a specific solvent phase and an aqueous phase according to the count...  
JPH08283215A
To provide a method for fractionating and purifying an aromatic polyamine mixture, capable of especially facilitating the fractionation and purification of a diphenylmethane-based aromatic polyamine mixture and obtaining isomers thereof ...  
JPH08283212A
To readily fractionate and purify the subject mixture and produce isomers in the pure form and in the enriched form with a good separation efficiency by recycling and extracting the aromatic polyamine mixture in the multi-stage extractio...  
JPH08231490A
To safely purify carbonyl chloride without liquefaction and highly profitably phosgenate by purifying contaminated carbon monoxide by adsorption in a solvent and using the obtained carbonyl chloride solution. This method of phosgenation ...  
JPH08225509A
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...  
JPH08225510A
To obtain the subject isocyanate continuously and in a high yield by circulating a reaction mixture of a specific amine and phosgene through a bubbling column in an organic solvent. This method for preparing an organic isocyanate is prov...  
JPH08176091A
PURPOSE: To obtain the subject compound little in byproducts and capable of being easily isolated in a high yield by heating a specific acylcarbamate compound in the presence of a basic substance and an acid halide at a low temperature. ...  
JPH08104755A
PURPOSE: To obtain an isocyanatosilicon compd. useful as a material for synthesizing, e.g. a long-chain polysiloxane having only one NCO group in the molecule by selecting a specific isocyanatosilicon compd. CONSTITUTION: An isocyanatosi...  
JPH0899946A
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...  
JP2512660B2
PURPOSE: To obtain a polyisocyanate composition having extremely excellent low-temperature storage stability and useful for the production of a urethane resin product such as automobile bumper and shoe sole by adding a specific amount of...  
JPH0889702A
To separate a solid residue from a soln. of the residue in a simple process by adding inert high-boiling poit hydrocarbons in a specified ratio in a stirred bed, heating the evaporable materials under vacuum to evaporate, drawing off and...  
JPH0867662A
PURPOSE: To obtain a liquid diphenylmethane diisocyanate having sstabilized properties by adding a phosphorin-based catalyst and a phosphorous ester to diphenylmethane diisocyanate and carrying out the reaction. CONSTITUTION: The method ...  
JPH0859592A
PURPOSE: To obtain the subject new compound having a combination of both the optical activity and physiological activity inherent in amino acid, and useful as a starting material for polymers having liquid crystal disposition, biocompati...  
JPH0859593A
To safely obtain the subject compound in a high yield by carrying out phosgenation of an aromatic polyamine in a gaseous phase in the presence of phosgene which is excess by a specific ratio without using a large excess of phosgene. (A) ...  
JPH07316123A
PURPOSE: To provide a process for producing the compound having freely controllable nucleus composition and utilizable for the production of polyurethane foam, elastomer, adhesive, coating, etc. CONSTITUTION: A mixture of isocyanates of ...  
JPH07316122A
PURPOSE: To provide a process for the production of a methylene-crosslinked polyphenylene polyisocyanate having low acid and hydrolyzable chlorine contents and excellent hue. CONSTITUTION: A methylene-crosslinked polyphenylene polyisocya...  
JPH07309926A
PURPOSE: To produce a polyisocyanate compd. which contains a uretedione group, has a low content of linear uretedione trimer and higher oligomers, a high isocyanate content, and a low viscosity, and is useful as a material for a curative...  
JPH07309828A
PURPOSE: To obtain a new diisocyanate useful for producing a plastic containing urethane group or urea group and having a photostability and a weather resistance. CONSTITUTION: This new diisocyanate is a diisocyanate of formula I (R is H...  
JPH07309827A
PURPOSE: To provide a process for producing an aliphatic polyisocyanate capable of reducing usage of phosgene, preventing tar formation, increasing yield and performing other improvements by introducing an inert gas into the reaction sys...  
JPH07291917A
PURPOSE: To obtain acyl isocyanates of high purity in high yields without danger by reacting oxalyl chloride with a salt selected from hydrohalides and sulfates of a specific amide /or a carbamate and then, heating the reaction mixture. ...  
JPH07285925A
PURPOSE: To isolate a trinuclear compound in a high yield and in a high purity, while reducing the by-production of tar, by subjecting a methylene-cross-linked polyphenylene polyisocyanate mixture to the combination of specific separatio...  
JPH07278087A
PURPOSE: To provide a relatively simple method for producing an isocyanate or an isocyanate mixture which contains substantially no color causing substance in high yield, a method for manufacturing an isocyanate which contains substantia...  
JPH07278088A
PURPOSE: To provide a method for purifying an aliphatic isocyanate, capable of remarkably reducing the contents of hydrolyzable chlorine and coloration- causing substances contained in the aliphatic isocyanate, and capable of giving non-...  
JPH07278089A
PURPOSE: To produce a diisocyanate by gas-phase phosgenation of an aliphatic diamine having two primary amino groups in the 1,2- or 1,3-position to one another or of cycloaliphatic diamine having two primary amino groups in the 1,2- or 1...  
JPH07258194A
PURPOSE: To produce an isocyanate useful as a raw material for a polyurethane, etc., in a high space time yield while improving the thermal decomposition rate and reducing formation of by-products by thermally decomposing a carbamic acid...  
JPH07258195A
PURPOSE: To produce isophorone diisocyanate while preventing formation of aggregate, accordingly without causing a trouble related to operation by conducting phosgenation of isophorone diamine hydrochloride derived from isophorone diamin...  
JPH07252200A
PURPOSE: To continuously obtain the subject compound at an improved phosgenation reaction rate and in an improved yield for the objective product by feeding isophorone diamine, hydrogen chloride and an inactive solvent into a reactor and...  
JPH07252241A
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...  
JPH07233137A
PURPOSE: To provide a method capable of easily and extremely stably producing an aliphatic polyisocyanate little in unreacted filtration cakes in high yield. CONSTITUTION: A method for producing an aliphatic polyisocyanate comprises simu...  
JPH07233136A
PURPOSE: To provide a method capable of continuously producing a methylene- cross-linked polyphenylene polyisocyanate which is not only low in acid content and in hydrolyzable chlorine content but also excellent in color tone. CONSTITUTI...  
JPH07216051A
PURPOSE: To provide a new masked polyisocyanate which has isocyanate groups masked specifically, is excellent in storage stability, safeness to human bodies, lowering the reaction temp., etc., gives polymers and crosslinked articles exce...  
JPH07196594A
PURPOSE: To provide a method for producing a high purity (cyclic) aliphatic diurethane especially suitable for producing a (cyclic) aliphatic diisocyanate by the thermal cleavage of a urethane and method for producing the diisocyanate by...  
JPH07165696A
PURPOSE: To provide a production method simplified in process, capable of reducing utility cost and, simultaneously, capable of obtaining bis(isocyanatomethyl)cyclohexane in high selectivity and high space time yield. CONSTITUTION: One m...  
JPH07149705A
PURPOSE: To stabilize in a suitable method an aliphatic (alicyclic) polyisocyanate obtained by a phosgene-free reaction without exerting an adverse effect on the reactivity of the polyisocyanate. CONSTITUTION: There is provided a stable ...  
JPH07145134A
PURPOSE: To improve reactivity of xylenolic acid whose reactivity with a diphenylmethane diisocyanate is low with the diphenylmethane diisocyanate. CONSTITUTION: In producing a blocked isocyanate by adding a toluene diisocyanate or a dip...  
JPH07138222A
PURPOSE: To produce isocyanate substd. isophthaloyl chloride useful in the production of a multilayered reverse osmosis membrane having surprisingly increased solute rejection and permeation properties. CONSTITUTION: A mixture of amino s...  
JPH07101926A
PURPOSE: To provide a new aromatic diisocyanate having low toxicity owing to extremely low vapor pressure at normal temperature, exhibiting high stability and useful as a raw material for heat-sensitive recording material, a raw material...  
JPH0789921A
PURPOSE: To provide a novel acid halide compound useful for producing a 2-alkyl-2-propenoyl isocyanate useful as an intermediate for organic syhtheses, medicines and agrochemicals, and as a starting raw material for reactive polymer mate...  
JPH0782230A
PURPOSE: To provide a producing method not only producing a MDI-based polyisocyanate which is not colored or remarkably reduced in coloring, but simultaneously capable of also preventing coloring during storage. CONSTITUTION: In producin...  
JPH0770581A
PURPOSE: To obtain a fuel composition which can prevent or reduce the formation of deposits on a suction valve and promotes the cleanability of the whole suction system by incorporating a specified aromatic compound and to obtain a lubri...  
JPH0753498A
PURPOSE: To obtain the subject compound in high efficiency using an industrially available xylylene dicyanide as raw material. CONSTITUTION: Xylylene dicyanide is catalytically reduced into N,N '-(phenylenebisethylene)bisamine, which is,...  
JPH072754A
PURPOSE: To prepare an organic isocyanate in high yield by thermally decomposing the corresponding carbamate in multiple steps and removing the alcohol produced by the thermal decomposition in the intermediate step of the steps by the st...  
JPH072755A
PURPOSE: To obtain isocyanates useful as binders for one-component coating compositions which may be cured at a room temperature. CONSTITUTION: A process for the preparation of olefinically unsaturated isocianates comprises reacting (a1)...  
JPH072753A
PURPOSE: To obtain a half-blocked diisocyanate composition not containing substantially unreacted organic diisocyanate compound, containing hard any di-blocked diisocyanate compound. CONSTITUTION: The method for producing half-blocked di...  
JPH06345707A
PURPOSE: To obtain a method for reducing hydrolyzable chlorine in an organic isocyanate compound. CONSTITUTION: An inert gas is passed through a liquid organic isocyanate compound under conditions of 80-150°C temperature and 0.1-100mmHg...  
JPH06340605A
PURPOSE: To provide new anilines, isocyanates, carboxylic acid azides useful as intermediates for preparation of new bezoyl ureas having pesticidal effect. CONSTITUTION: An aniline of formula I (wherein R1 is Br or I), for example, 4-bro...  
JPH06336469A
PURPOSE: To recover pure isocyanate and a pourable, non-dusting, granular material. CONSTITUTION: Pure isocyanate is recovered from an isocyanate-contg. residue of a phosgene/amine reaction mixture by continuously feeding such residue an...  

Matches 601 - 650 out of 873