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JP04235155 |
PURPOSE: To enable to readily separate a high boiling point solvent from a mixture of the high boiling point solvent and high boiling point products (high boiler) by-produced in the reaction, when an urethane compound is subjected to a t...
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JP04235156 |
PURPOSE: To provide a process for producing 4,4'-diisocyanato dicyclohexylmethane contg. at least 90 wt.% trans, trans-isomer. CONSTITUTION: (a) A mixture composed of the 4,4'-diisocyanato dicyclohexylmethane contg. at least 30 wt.% tran...
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JP04230354 |
PURPOSE: To obtain a new odorless aromatic diisocyanatoindane derivative, usable as a raw material for polyurethane resins 6r polyurea resins in various fields such as foams, elastomers, synthetic leathers, adhesives and films with hardl...
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JP04221356 |
PURPOSE: To efficiently produce xylylene diisocyanate by pyrolysis of an urethane compound which is a phenylene bis(methylene)-biscarbamic acid ester. CONSTITUTION: Reaction distillation from the resultant xylylene diisocyanate is carrie...
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JP04221357 |
PURPOSE: To provide new pentane-diisocyanate in which the physical properties and the working properties thereof are alternatable by properly selecting substituents and which can effectively be used as a material for preparing polyisocya...
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JP04211641 |
PURPOSE: To inhibit corrosion of apparatus by a mixture containing chlorine, hydrogen chloride and phosgene formed upon addition of water and to match the iodine color number of crude MDI to a level achievable by the addition of water or...
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JP04210950 |
PURPOSE: To provide a simple method of preparing 4,4'-diisocyanato dicyclohexylmethane containing at least 90 wt.% of trans,trans-isomer. CONSTITUTION: (a) An isomer mixture of 4,4'-diisocyanato dicyclohexylmethane containing at least 30...
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JP04159259 |
PURPOSE: To obtain highly reactive poly-MDI and high-purity 4,4'-MDI simultaneously by separating the product obtained by reaction of a polyamine with phosgene into a MDI isomer mixture and poly-MDI through distillation and by further se...
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JP04145059 |
PURPOSE: To industrially advantageously produce the subject compound by reacting an aromatic amine compound with an excessive amount of phosgene in an inert solvent by two steps under specific conditions to reduce the contents of acids a...
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JP04089465 |
PURPOSE: To easily obtain the subject compound on an industrial scale under low reaction pressure in a state to enable easy separation and recovery of catalyst without causing the corrosion problem of the apparatus by reacting an aromati...
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JP04026666 |
PURPOSE: To prepare the subject composition having excellent color tone and transparency by specifying an oxygen concentration and a reaction temperature in the gas phase of a reaction tank with charging an inert gas when diphenylmethane...
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JP04026665 |
PURPOSE: To profitably an isocyanate by circulating a liquid component to a reaction section for thermally decomposing the subject compound into the isocyanate and an organic hydroxy compound in a liquid phase and to an evaporation secti...
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JP04018415 |
PURPOSE: To provide the subject compsn. composed of a reaction product of a specific ratio of an org. isocyanate and methylpropanediol and crystalline at room temp. and excellent in storage stability. CONSTITUTION: An org. isocyanate (pr...
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JP04009362 |
PURPOSE: To obtain the subject compound in high yield with decreased number of steps using an easily controllable low-temperature solution reaction by using α-(aminophenyl)ethanol as a starting raw material and reacting with phosgene in...
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JP03287570 |
PURPOSE: To obtain the subject composition, consisting essentially of a diisocyanate compound containing a protonic acid, effective in synthesizing polyurethane resins useful as coatings, cushioning materials, etc., and capable of activa...
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JP03275661 |
PURPOSE: To promote the urethanization reaction by adding a protonic acid to a diisocyanate compound obtained by the reaction of a diamine with dimethyl carbonate produced essentially without using phosgene in the reaction process. CONST...
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JP03220167 |
PURPOSE: To obtain the subject compound in high selectivity and high yield by continuously reacting an alicyclic-aliphatic diamine as a starting raw material with hydrogen chloride using a common specific inert solvent and then reacting ...
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JP03218344 |
NEW MATERIAL: A polyisocyanate containing ester groups and having a content of aliphatically bound isocyanate groups of 18-33 wt.%, an average NCO functionality of 1 to 10 and a viscosity of 200 to 2500 mPa.s at 22°C. USE: An isocyanate...
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JP03204851 |
PURPOSE: To obtain the subject compounds containing only a very low quantity of impurities and useful as a raw material of polyurethane-based materials, etc., with a high volumetric efficiency by using a specified solvent in a reaction b...
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JP03200756 |
PURPOSE: To obtain the title compound useful as a raw material for polyurethane, polyurea, etc., in high yield by preparing a urethane compound from formamide compound and dimethyl carbonate as starting raw materials and thermally decomp...
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JP03173859 |
PURPOSE: To obtain the subject compound which is useful for the preparation of polyurethane by reacting aromatic amines with isocyanic acid and dialkylamine in turn and thermal-decomposing the obtained aromatic dialkyl urea in the presen...
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JP03133949 |
PURPOSE: To obtain 1,8-menthane diisocyanate having extremely low chlorinated impurities in high volume-efficiency by using an ester as a reaction solvent in the reaction of 1,8-menthanediamine or its hydrochloride with phosgene. CONSTIT...
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JP03115258 |
PURPOSE: To obtain the subject compd. with a high vol./time yield while reducing by-products to a min., by separating a product obtd. by thermally cleaving a carbamic acid ester with a two-stage dephlegmator. CONSTITUTION: A gaseous prod...
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JP03106829 |
PURPOSE: To provide efficiently the subject compound useful as intermediates for various chemicals, by dehydrogenating a corresponding halogen-substituted cyclohexene or cyclohexadiene with a brominating agent at a specific temperature i...
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JP03072453 |
NEW MATERIAL:A compound shown by formula I (R is H or 1-5C alkyl; NCO of cyclohexyl group is at 2- to 4-position). EXAMPLE: α-(3-Isocyanatocyclohexyl)ethyl isocyanate. USE: A raw material for polyurethane resin, polyurea resin or polyam...
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JP03066654 |
PURPOSE: To remove isocyanic acid from a gaseous mixture of the isocyanic acid and ammonia, by adding a tertiary amine or an ether at a specific range of temp. to form an adduct of the isocyanic acid with the tertiary amine or ether, and...
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JP03066655 |
PURPOSE: To obtain an asymmetrically substd. urea, carbamate, thiocarbamate and a substd. isocyanate with high purities at high yields, by reacting an adduct of isocyanic acid to a tert. amine with a prim. amine or alcohol in an inactive...
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JP03048651 |
PURPOSE: To obtain an aliphatic isocyanate useful as a raw material of urethanes and polyurethanes, etc., by forming an aliphatic urea from a primary aliphatic amine and isocyanic acid and reacting the urea with a dialkyl amine followed ...
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JP03027351 |
PURPOSE: To obtain corresponding isocyanates useful for preparing polyurethanes and modified polyurethanes by reacting a urea reaction product of a diamine or a polyamine with an isocyanic acid with a dialkylamine and performing pyrolysi...
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JP03024049 |
NEW MATERIAL:4-Phenyl-4-isocyanatomethyl-1,7-diisocyanatoheptane
of formula I. USE: Useful as a raw material for various polyurethane resins for paint, film, adhesive, fiber, etc., and especially as a curing agent for non-yellowing two-...
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JP03007253 |
PURPOSE: To obtain the objective substance with an ultralow content of chlorinated impurities by using a fatty acid ester as a reaction solvent in reacting xylylenediamine or hydrochloride thereof with phosgene and obtaining the subject ...
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JP03005450 |
PURPOSE: To obtain the subject compound in high yield by distillation of a mixture of a monoisocyanate compound and a diisocyanate compound in the presence of a high-boiling solvent. CONSTITUTION: When a diisocyanate compound is to be ob...
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JP02311452 |
PURPOSE: To provide a diisocyanate compound having a chlorine-content lower than a specific level, useful for the production of polyurethane and having improved corrosion resistance, weather resistance, moisture resistance and heat resis...
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JP02295959 |
PURPOSE: To obtain a polyisocyanate in a pure form in good yield by thermally decomposing the corresponding N-substituted carbamic acid ester in a tube reactor and extracting a fraction containing the objective compound from which the al...
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JP02295958 |
PURPOSE: To obtain a polyisocyanate in a pure form in good yield by using a specified solvent as a decomposing medium, thermally decomposing an N- substituted carbamic ester while continuously removing the formed alcohol and extracting t...
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JP02270854 |
NEW MATERIAL:α-(3-Isocyanatophenyl)ethyl isocyanate expressed by formula I. USE: Usable as a raw material for polyurethane resins and polyurea resins in foams, elastomers, synthetic leathers, coatings, adhesives, films, etc. PREPARATION...
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JP02258755 |
PURPOSE: To obtain treated distilled residues useful for producing rigid foam by reacting an epoxy compd. with toluenediisocyanate distilled residues. CONSTITUTION: Toluenediisocyanate distilled residues are reacted with 0.5-20 equivalen...
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JP02250857 |
PURPOSE: To efficiently and economically obtain polyisocyanate useful as a raw material for polyurethane production by using a plate tower as a reactor, feeding polycarbamate to the middle stage of the tower and subject polycarbamate to ...
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JP02231461 |
PURPOSE: To economically obtain the subject compound useful as raw material, etc., of polyurethane without using phosgene by heat-decomposing an urethane compound able to be readily synthesized in a low cost in specific solvent at specif...
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JP02212465 |
PURPOSE: To industrially advantageously obtain polymethylene polyphenyl polyisocyanate by thermally decomposing polymethylene polyphenyl polycarbamate in boiling organic solvent, forming thin film from reacted solution and further perfor...
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JP02188567 |
PURPOSE: To produce the subject compound in high yield by continuously feeding urethane compound to a position higher than third stage in reaction and distillation column and feeding catalyst to a position higher than the position of the...
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JP02145556 |
NEW MATERIAL:1,7-Diisocyanato-4-isocyanatopropyl-heptane expressed by formula I. USE: Useful as a raw material for various polyurethane resins, such as coatings, films, adhesives or fibers, especially as a curing agent for nonyellowing t...
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JP02145555 |
PURPOSE: To improve efficiency of purification through distillation of an isocyanatoalkyl (meth)acrylate without causing popcorn polymerization by adding sulfur dioxide to the above-mentioned isocyanatoalkyl ester. CONSTITUTION: A mixtur...
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JP02145554 |
PURPOSE: To obtain a compound useful as various synthetic intermediates in good yield without containing noxious impurities by reacting an imidazole derivative with phosgene and then with a monoalkanolamine and further esterifying the re...
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JP02138247 |
NEW MATERIAL:The benzoylurea derivative of formula I (R1 is F or Cl; R2 is F when R1 is F and R2 is H when R1 is Cl; X is CF2Br, CCl2H, CBr2H. CFHCI, OFUCF3, CFROCF3, CFHOC2F5 or CFHOC3H7-n). EXAMPLE: N-2,6-difluorobenzoyl-N,-[2-fluoro-4...
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JP02134355 |
PURPOSE: To enable economical production of the compound which is used as a starting substance for polyurethane or the like without use of phosgen by pyrolyzing a urethane compound in a solvent of a high boiling point in the presence of ...
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JP02129163 |
PURPOSE: To obtain the subject compound by synthesizing an unsaturated carboxylic acid 2-isocyanatoalkyl ester, substituting the solvent of an organic phase containing the product with a poor solvent of the polymer of said ester to remov...
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JP02111754 |
PURPOSE: To obtain a monoblocked diisocyanate contg. only a small amt. of a free diisocyanate by reacting a diisocyanate with a blocking agent in a specified molar ratio and removing the unreacted diisocyanate. CONSTITUTION: One mol of a...
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JP02101057 |
PURPOSE: To obtain (cyclo)aliphatic diisocyanate in high yield advantageously from an aspect of cost without using phosgene by converting a (cyclo)aliphatic diamine to corresponding bis-carbamate and subsequently continuously pyrolyzing ...
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JP02088535 |
NEW MATERIAL: A compd. represented by formula I [wherein R is alkyl, (substd.) aryl or (substd.) aralkyl; and X is hydroxymethyl, 2-hydroxyethyl, isocyanate, NH2, aminohalogenated hydracid base or CO-R1 (R1 is H, OH, alkoxy, alkyl, halog...
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