| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
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| 11/22/2000 | EP1053222A1 Method for the production of methylenedi(phenylamine) and methylenedi(phenyl isocyanate) |
| 11/17/2000 | CA2307992A1 A process for purifying organic isocyanates, the organic isocyanates so purified and their use |
| 10/31/2000 | US6140382 Process for the preparation of isocyanates or isocyanate mixtures useful for the preparation of polyurethane foams |
| 10/25/2000 | EP1046637A2 Process for the reduction of chlorine content of low molecular weight isocyanates |
| 10/25/2000 | EP1046636A2 Process for the reduction of chlorine content of organic isocyanates |
| 10/05/2000 | DE19914292A1 Reduction of the chorine content of low molecular isocyanates comprises reaction with a tertiary or quaternary amine group containing anion exchanger for ten minutes at less than two hundred degrees |
| 10/05/2000 | DE19914291A1 Process for the purification of a low molecular isocyanate, comprises addition of an oligomeric organic polyphosphate compound and heating for ten minutes below two hundred degrees |
| 09/07/2000 | DE19908793A1 Active isocyanate, useful for the production of molded articles, foam, fiber and sheet, is prepared by mixing an isocyanate with a phosphite having two groups with a total of 2-60 carbon atoms |
| 08/30/2000 | EP1031559A1 Process for the preparation of isocyanates by decomposition of urethanes |
| 08/30/2000 | CN1265096A Hydrazine derivatives |
| 08/24/2000 | DE19907648A1 Verfahren zur Herstellung von Isocyanaten durch Spaltung von Urethanen A process for the preparation of isocyanates by cleavage of urethanes |
| 08/02/2000 | CN1055080C Continous method for preparing organic ester isocyanate |
| 08/01/2000 | US6096805 Stable and high solids aqueous dispersions of blocked polyisocyanates |
| 07/20/2000 | WO2000042009A1 Stable activated novel carbamic acid derivatives, preparation method and use for preparing urea |
| 07/13/2000 | WO2000040524A1 Preparation of nuclear chlorinated aromatic compounds |
| 06/29/2000 | DE19859297A1 Verfahren zur Herstellung von Duroldiisocyanat A process for producing durene diisocyanate |
| 06/28/2000 | EP1013638A1 Method of producing duroldiisocyanate |
| 06/28/2000 | CN1258273A Method for preparation of organic isocyanates |
| 06/22/2000 | CA2293024A1 Process for the preparation of durene diisocyanate |
| 06/08/2000 | DE19855959A1 Isocyanates are prepared by thermal cleavage of urethanes, useful in the preparation of very pure aromatic di- and polyurethanes, which give a higher isocyanate yield than previous methods, without drying to very low moisture content |
| 05/31/2000 | CN1052974C Process for the production of isocyanantes and for the continuous working-up of the residue |
| 05/17/2000 | CN1052473C Process for preparation of aromatic isocyanate type compound in gas phase |
| 05/10/2000 | EP0876335B1 Production of isocyanate using chlorine recycle |
| 04/19/2000 | EP0993442A1 Hydrazine derivatives |
| 03/22/2000 | EP0986536A1 Method for the preparation of organic isocyanates |
| 03/22/2000 | EP0986535A1 Method for the preparation of organic isocyanates |
| 03/08/2000 | CN1246472A Method for decomposing solid leavings |
| 03/01/2000 | CN1245797A Preparation method of carbamate product with at least two carbamate radicals |
| 02/09/2000 | CN1049156C A process and a device for seperating a solid residue from its solution in a stirred bed of material |
| 01/04/2000 | US6010612 Production of isocyanate using chlorine recycle |
| 12/30/1999 | DE19828510A1 Simultaneous production of different isocyanates useful in polyurethane manufacture |
| 12/28/1999 | CA2021716C Polyisocyanates containing ester groups, a process for the production of these polyisocyanates and their use in polyurethane coating compositions |
| 12/23/1999 | WO1999065868A1 Method for treating distillation residues from the synthesis of toluene diisocyanate |
| 12/23/1999 | DE19827086A1 Verfahren zur Aufarbeitung von Destillationsrückständen aus der Synthese von Toluylendiisocyanat A process for working up distillation residues from the synthesis of tolylene diisocyanate |
| 12/01/1999 | EP0751931B1 Obtaining toluene 2,6-diisocyanate from a mixture containing toluene 2,6-diisocyanate and toluene 2,4-diisocyanate |
| 11/30/1999 | CA2155797C Process for preparing aromatic polyisocyanate compounds in the gas phase |
| 11/23/1999 | US5990345 Silylating an ethylenically unsaturated urethane compound, thermolysis at elevated temperature to form the unsaturated isocyanates, use as monomers or comonomers in the preparation of polymerisates or copolymerisates |
| 11/11/1999 | DE19820114A1 Process for the simultaneous production of (cyclo)aliphatic polyisocyanates |
| 11/09/1999 | US5981789 Chlorodenitrating aromatic compounds using less chlorinating agent and lower temperatures, then recycling the product mixture to increase the yield |
| 10/28/1999 | WO1999054289A1 Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine colour index |
| 10/28/1999 | DE19817691A1 Production of diphenylmethanediisocyanate and polyphenylene-polymethylene-polyisocynate mixtures |
| 10/28/1999 | CA2329655A1 Method for producing mixtures consisting of diphenylmethane diisocyanates and polyphenylene-polymethylene-polyisocyanates containing a reduced amount of chlorinated secondary products and with a reduced iodine colour index |
| 10/05/1999 | US5962728 Using an evaporative dryer; heating, cooling, solidifcatingmelt |
| 09/30/1999 | WO1999048863A1 Stabilisation of organic polyisocyanates |
| 09/30/1999 | CA2325034A1 Stabilisation of organic polyisocyanates |
| 09/29/1999 | EP0944588A1 Suspension crystallization method |
| 09/29/1999 | EP0944418A1 Suspension crystallization method |
| 09/23/1999 | WO1999047493A1 Method for the preparation of organic carbamates |
| 09/08/1999 | CN1227840A Process for preparing 2,2'-dimethyl-3,3',5,5' triphenyl methane tetraiso-cyanate |
| 09/08/1999 | CN1045003C Fractionation process of reaction mixture containing methylene bridged polyphenylene polyisocyanate |
| 09/01/1999 | EP0938513A1 Polyisocyanates containing tin and method for preparing polyisocyanate-polyaddition products |
| 08/25/1999 | EP0937033A1 Process for the isomeric separation of isocyanates |
| 08/24/1999 | US5942151 Polymeric MDI color |
| 08/19/1999 | WO1999041218A1 Alpha-methylstyrene dimer derivatives |
| 08/19/1999 | CA2319741A1 Alpha-methylstyrene dimer derivatives |
| 08/18/1999 | EP0936214A2 Method for producing isocyanatoalkyl (meth)acrylate |
| 08/18/1999 | EP0792263B1 Process for preparing isocyanates |
| 08/12/1999 | WO1999040059A1 Method for the production of methylenedi(phenylamine) and methylenedi(phenyl isocyanate) |
| 08/12/1999 | DE19804915A1 Verfahren zur Herstellung von Methylendi(phenylamin) und Methylendi(phenylisocyanat) Process for the preparation of methylenedi (phenylamine) and methylene di (phenyl isocyanate) |
| 08/12/1999 | CA2320477A1 Method for the production of methylenedi(phenylamine) and methylenedi(phenyl isocyanate) |
| 08/06/1999 | CA2261324A1 Method for producing isocyanatoalkyl (meth)acrylate |
| 08/04/1999 | EP0749420B1 Polycarbamates, process for preparing polycarbamates, and process for preparing polyisocyanates |
| 08/03/1999 | US5931579 Mixer-reactor and process for containing nozzles for carrying out the phosgenation of primary amines |
| 07/21/1999 | EP0929518A1 Isocyanate derivatives and their production |
| 07/20/1999 | US5925783 Process for the preparation of isocyanates |
| 07/15/1999 | DE19813136C1 3,5-Di-tert-butyl-4-hydroxyphenylpropionic acid esters |
| 07/14/1999 | EP0928785A1 Process for the phosgenation of amines in the gas phase using microstructure mixers |
| 07/13/1999 | CA2151725C Process for preparing isocyanates |
| 06/22/1999 | US5914428 Reacting dimethyl carbonate with an aliphatic diamine in presence of an alkali metal or compound as carbamylation catalyst to form carbamate, thermally decomposing the product in high boiling solvent to produce aliphatic diisocyanate |
| 06/15/1999 | CA2091666C Process for preparing isocyanates |
| 06/02/1999 | CN1218034A Method for separating tolylene diisocyanate ester by freezing in cold storage |
| 05/26/1999 | EP0918052A1 Improved polymeric mdi color |
| 05/20/1999 | CA2252749A1 Improved polymeric mdi color |
| 05/11/1999 | US5902459 Recovery of products from toluenediisocyanate residues |
| 04/28/1999 | CN1215415A Isocyanate compositions, method for using same, use thereof for producing coatings, and reducing coatings |
| 04/27/1999 | CA2108508C Process for the preparation of isocyanate-type aromatic compounds in a gaseous phase |
| 03/24/1999 | EP0640071B1 Use of liquid esters as solvents for isocyanates |
| 03/16/1999 | US5883291 Distillation and heat stable liquids |
| 03/04/1999 | DE19736975A1 Isocyanate solutions are treated with hydrogen without formation of overpressure |
| 02/16/1999 | US5872278 Reacting the corresponding amines with phosgene, the amines are treated with solid inorganic substances containing lewis acid and/or bronsted acid centers prior to the reaction with the phosgene |
| 01/14/1999 | WO1999001428A1 Hydrazine derivatives |
| 01/14/1999 | CA2295062A1 Hydrazine derivatives |
| 01/07/1999 | DE19829229A1 Hydrazinderivate Hydrazine |
| 12/17/1998 | WO1998056758A1 Process for the production of organic isocyanates |
| 12/15/1998 | US5849947 Process for the preparation of toluylene diisocyanate, specific mixtures of toluylene diamine and water, and the use of toluylene diamine and water mixtures to prepare toluylene diisocyanate |
| 12/15/1998 | US5849855 Blocked polyisocyanate composition and one-pack thermocuring resin composition comprising the same |
| 12/09/1998 | CN1201450A Method for producing organic diurethanes and/or polyurethanes and their use in production of di-and/or polyisocyanates |
| 12/08/1998 | US5847134 Fluorocarbon-containing isocyanate derivatives and soil-resist agents |
| 12/08/1998 | CA2141643C Process for preparing isocyanates from urethanes by a novel technique |
| 12/03/1998 | WO1998054129A1 Method for the preparation of organic isocyanates |
| 12/03/1998 | WO1998054128A1 Method for the preparation of organic isocyanates |
| 12/03/1998 | CA2289656A1 Method for the preparation of organic isocyanates |
| 12/02/1998 | EP0777647B1 4,4'-methylen-bis-(3-chloro-2,6-dialkylphenylisocyanates) and polyurethane systems containing the same |
| 12/01/1998 | CA2036537C 2,2-dialkylpentane 1,5-diisocyanates, 2,2-dialkylpentane 1,5-diurethanes and 2,2-dialkylpentane 1,5-dicarbamoyl chlorides, and their preparation and their use |
| 11/25/1998 | CN1200111A Polyisocyanate particles of controlled particle size and particle size distribution |
| 11/18/1998 | EP0877731A1 Fluorocarbon-containing isocyanate derivatives and soil-resist agents |
| 11/11/1998 | EP0876335A1 Production of isocyanate using chlorine recycle |
| 11/04/1998 | CN1197793A Preparation of isocyanates having light color |
| 09/23/1998 | EP0866057A2 Process for the preparation of isocyanates of light colour |
| 09/19/1998 | CA2229835A1 Preparation of isocyanates having a light color |