| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
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| 08/27/1991 | US5043471 Process for the preparation of polyisocyanates |
| 08/27/1991 | US5043470 From oil solution |
| 07/24/1991 | CA2034035A1 Process for preparing high trans,trans-isomer containing 4,4'-diisocyanato dicyclohexylmethane |
| 07/17/1991 | EP0436800A1 Process for producing isocyanate compound |
| 06/26/1991 | EP0433823A2 Storage stable solid isocyanate compositions, preparation and method of use thereof |
| 06/22/1991 | CA2030377A1 Storage stable solid isocyanate compositions, preparation, and method of use thereof |
| 05/28/1991 | US5019264 Multilayer reverse osmosis membrane of polyamide-urea |
| 05/08/1991 | EP0425596A1 A process for distillation of crude isocyanate concentrates. |
| 05/02/1991 | EP0424836A1 Preparation process of aliphatic isocyanates |
| 04/24/1991 | CA2028162A1 Preparation process of aliphatic isocyanate |
| 04/16/1991 | US5008447 Process for the preparation of polyurethanes with liquid crystal properties and diisocyanates suitable for carrying out the process |
| 03/20/1991 | EP0417690A2 Aromatization process |
| 03/13/1991 | EP0416236A2 Process for the isolation isocyanic acid from a gaseous mixture of isocyanic acid and ammonia |
| 03/12/1991 | CA2023720A1 Aromatization process |
| 03/07/1991 | DE3928555A1 Isocyante(s) prodn. - by reaction of cpd. with one or more olefinic double bonds with substd. ammonium isocyanate in inert diluent |
| 02/26/1991 | US4996351 Process for reducing the quantity of hydrolyzable chlorides in isocyanates |
| 02/13/1991 | EP0412380A1 Polyisocyanates or mixtures of polyisocyanates with estergroups, a process for the preparation of such isocyanates or such mixtures of polyisocyanates and their utilization for polyurethane lacquers |
| 02/05/1991 | US4990633 Fluorinated bisaryloxy-substituted alkenes, process for their preparation and their use |
| 01/30/1991 | EP0410169A2 Process for the preparation of asymmetrically substituted ureas, carbamates, thiocarbamates and substituted isocyanates |
| 01/16/1991 | EP0408277A2 Process for the preparation of aliphatic isocyanates |
| 01/08/1991 | US4983763 Liquid and solid phase separation |
| 12/18/1990 | US4978779 Thermal decomposition of corresponding ureas |
| 12/12/1990 | EP0402020A1 An integrated process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (isocyanates) from diamines and polyamines |
| 12/05/1990 | CA2017660A1 Integrated process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (isocyanates) from diamines and polyamines |
| 11/14/1990 | EP0396977A2 Process for the preparation of polyisocyanates |
| 11/14/1990 | EP0396976A2 Process for the preparation of polyisocyanates |
| 11/13/1990 | US4970319 Process for the preparation of acyl isocyanates |
| 11/10/1990 | CA2015223A1 Process for the preparation of polyisocyanates |
| 11/10/1990 | CA2015222A1 A process for the preparation of polyisocyanates |
| 11/06/1990 | US4968830 Halogenative dehydrogenation |
| 10/10/1990 | EP0391716A1 An integrated process for the preparation of aromatic mono- and polyisocyanates from aromatic amines |
| 10/02/1990 | US4960848 Trimerizing with quaternary ammonium fluoride catalyst, terminating with poison |
| 09/26/1990 | CN1045578A Preparation process of eylylene diisocyanate |
| 09/04/1990 | WO1990009990A1 A process for distillation of crude isocyanate concentrates |
| 09/04/1990 | CA2028819A1 Process for distillation of crude isocyanate concentrates |
| 08/29/1990 | EP0384463A1 Preparation process of xylylene diisocyanate |
| 08/23/1990 | CA2010224A1 Preparation process of xylylene diisocyanate |
| 08/21/1990 | US4950813 Preparation of substituted benzotrichlorides |
| 08/01/1990 | EP0380146A2 Process for the preparation of N-omega-hydroxyalkyl, N-omega-hydroxy-oxa-alkyl and N-omega-hydroxy-polyoxa-alkyl carbamates |
| 06/27/1990 | EP0374932A1 Rigid foams prepared from treated toluene diisocyanate residue |
| 06/22/1990 | CA2006371A1 Rigid foams prepared from treated toluene diisocyanate residue |
| 06/19/1990 | US4935486 Process for the production of modified polyisocyanates, the polyisocyanates obtainable by this process and their use as binders or as a binder component |
| 05/22/1990 | CA1269396A1 Process for producing 2-isocyanato-2,3-dehydro carboxylic esters |
| 05/15/1990 | US4925982 Production of isocyanate compounds |
| 05/08/1990 | CA1268891A1 Process for the production of blocked polyisocyanates containing carbodiimide groups, the polyisocyanates obtainable by this process and their use for the production of plastics |
| 05/01/1990 | US4922005 Preparation process of hexamethylene |
| 04/17/1990 | US4918220 Separation of toluene diisocyanate from the residues of the production thereof |
| 04/03/1990 | US4914238 Process for the production of diisocyanates, selected diisocyantes produced thereby and the production of polyurethane plastics therefrom |
| 03/27/1990 | CA1267157A1 Isocyanate compounds and their production |
| 02/28/1990 | EP0355443A2 Cyclic process for the preparation of (cyclo)aliphatic diisocyanates |
| 02/27/1990 | US4904704 Reacting hydrolyzable chloride with epoxy component; polyisocyanurates and polyurethanes |
| 01/24/1990 | EP0351647A2 2,2-Difluorocyclopropyl derivates |
| 01/23/1990 | US4895920 Process for the preparation of polyurethanes with liquid crystal properties and diisocyanates suitable for carrying out the process |
| 01/02/1990 | US4891441 Process for the preparation of polymeric tertiary aralkyl isocyanates from 1,3- or 1,4-bis(1-chloro-1-methylethyl)benzene |
| 12/19/1989 | US4888125 Bis(isocyanatophenoxy)alkanes produced by phosgenation of corresponding amines |
| 11/29/1989 | EP0343441A2 Fluorinated bis-aryloxy-substituted alkenes, method for their production an their application |
| 11/28/1989 | US4883909 Liquid diphenylmetane diisocyanate compositions |
| 11/28/1989 | US4883908 Process for the preparation of aromatic isocyanates from dialkyl ureas using an organic sulfonic acid promoter |
| 11/21/1989 | CA1263116A1 Aliphatic isocyanate compounds |
| 11/15/1989 | EP0341516A1 Stabilized polyisocyanates |
| 11/15/1989 | EP0341515A1 Liquid diphenylmethane diisocyanate compositions |
| 11/08/1989 | EP0340584A1 Process for the preparation of modified polyisocyanates. |
| 11/07/1989 | US4879409 Cyclohexylmethane diisocyanates |
| 11/07/1989 | US4879408 Intermediates for polyurethanes |
| 11/02/1989 | EP0339396A1 Process for producing polyisocyanates containing isocyanurate groups |
| 10/24/1989 | US4876380 Color reduction of polymeric isocyanates via multiple solvent fractionation |
| 10/18/1989 | EP0337898A1 Process for the purification and isolation of isocyanate condensates by extraction with liquid or supercritical CO2 |
| 10/10/1989 | US4873365 Process for the preparation of isophorone diisocyanate from isophorone dicarbamyl esters using highly selective SnO2 or CuO catalysts |
| 10/10/1989 | US4873364 Process for the preparation of methylene diphenylene diisocyanates and polymethylene polyphenylene poly (diisocyanates) |
| 10/03/1989 | US4871871 Process for the preparation of aromatic mono- and polyisocyanates |
| 10/03/1989 | US4871828 Purification/isolation of isocyanate condensates |
| 10/03/1989 | US4871460 Isolation/purification of isocyanate condensates by extraction with liquid or supercritical gas |
| 09/27/1989 | EP0334720A1 Process for the preparation of acyl isocyanates |
| 08/16/1989 | CN1034712A Process for making aliphatic and cycloaliphatic polyisocyanates |
| 08/09/1989 | EP0327231A1 Process for making aliphatic and cycloaliphatic polyisocyanates |
| 08/09/1989 | CN1034536A Continuous preparation method of monoisocyanate or polyisocyanate |
| 07/25/1989 | US4851571 Process for the production of isocyanates |
| 07/25/1989 | US4851570 From amines, phosgene; multicompartment; perforated plates; multizonal |
| 07/19/1989 | EP0324701A1 Process for the separation of toluene diisocyanate from its production residues |
| 07/19/1989 | EP0324215A1 Process for separating a mixture comprising 2,6-toluene diisocyanate and 2,4-toluene diisocyanate |
| 07/12/1989 | EP0323514A1 Process for preparing isocyanate compounds |
| 07/11/1989 | US4847408 Phosgenation of diamines |
| 07/11/1989 | CA1257292A1 Process for separating methyl isocyanate |
| 07/05/1989 | EP0322647A1 Process for the continuous production of mono- or polyisocyanates |
| 07/05/1989 | CN1033620A Process for puring and separating isocyanate condensation compounds by extraction with liquid supercritical carbon dioxide |
| 07/04/1989 | US4845283 Alkenylated diphenyldiisocyanates for use in preparing polyurethane/urea systems |
| 06/06/1989 | US4837359 From diisocyanate and diamine, both containing aliphatically and/or cycloaliphatically bound isocyanate and amino groups |
| 05/31/1989 | EP0317743A1 Process for the preparation of monoblocked (cyclo) aliphatic diisocyanates |
| 05/10/1989 | EP0314985A1 Process for the preparation of mono- and polyisocyanates |
| 05/09/1989 | US4828753 Organostannic compounds |
| 04/19/1989 | EP0311901A2 Alkenylated diphenyldiisocyanates for use in preparing polyurethane/urea systems |
| 04/11/1989 | US4820866 Process for the production of diisocyanates, selected diisocyanates produced thereby and the production of polyurethane plastics therefrom |
| 04/11/1989 | CA1252479A1 Stabilisation process of polyisocyanate organic solutions |
| 03/29/1989 | EP0309364A2 Process for the purification and isolation of condensed isocyanates by extraction with liquid or supercritical carbon dioxide |
| 03/22/1989 | EP0307763A2 Process for the preparation of polyisocyanates |
| 03/22/1989 | EP0307757A2 Process for the production of polyurethanes with LC-properties and diisocyanates suitable for carrying out this process |
| 03/15/1989 | EP0306804A2 Process for the preparation of substituted benzyl trichlorides |
| 03/07/1989 | US4810820 Process for the production of polyisocyanates containing allophanate groups |
| 03/07/1989 | CA1250860A1 Production of isocyanate compounds |
| 03/07/1989 | CA1250854A1 Process for the production of thermally color stable aliphatic and/or cycloaliphatic diisocyanates and the use thereof for the production of modified polyisocyanates having improved color properties |