| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
|---|
| 01/02/1997 | EP0751118A2 Process for the preparation of mixtures of diphenylmethane diisocyanates and polyphenylmethylene polyisocyanates with a reduced iodic coloremetric measure and reduced chlorine content |
| 12/31/1996 | CA2180285A1 Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number and a reduced chlorine content |
| 12/27/1996 | EP0749958A1 Process for the preparation of triisocyanates |
| 12/27/1996 | EP0749420A1 Polycarbamates, process for preparing polycarbamates, and process for preparing polyisocyanates |
| 12/24/1996 | CA2179344A1 Process for preparing triisocyanates |
| 12/10/1996 | US5583251 Process for the production of isocyanates and for the production of light-colored foams therefrom |
| 12/03/1996 | US5580947 Amidation |
| 10/16/1996 | EP0737668A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/16/1996 | EP0737667A1 Fractionation and purification of aromatic polyamine mixtures and their use |
| 10/16/1996 | CN1133286A Continual method for preparation of organic ester isocyanate |
| 10/09/1996 | EP0736520A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/09/1996 | EP0736519A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/09/1996 | EP0736518A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/09/1996 | EP0736517A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/09/1996 | EP0736516A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/09/1996 | EP0736515A1 Fractionation and purification of mixtures of aromatic polyamines and their use |
| 10/01/1996 | US5560755 Provides fuel intake system cleanliness in port fuel injected internal combustion engine |
| 09/10/1996 | US5554787 2,2-dialkylpentane 1,5-diisocyanates, 2,2-dialkylpentane 1,5-diurethanes and 2,2-dialkylpentane 1,5-dicarbamoyl chlorides, and their preparation and use |
| 09/03/1996 | US5552507 Diisocyanates and processes for their production and use |
| 08/13/1996 | CA2046365C Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number |
| 07/24/1996 | CN1127248A A process for the preparation of aromatic polyisocyanate compounds in the gaseous phase |
| 07/03/1996 | CN1125718A Process for the preparation of aliphatic polyisocyanates |
| 07/02/1996 | US5532360 Method for handling (2-Alkyl)acryloyl isocyanate, method for stabilizing (2-Alkyl)acryloyl isocyanate, method for producing (2-Alkyl)acryloyl isocyanate, heterocyclic compound, and method for producing heterocyclic compound |
| 06/12/1996 | EP0716079A1 Continuous process for the manufacture of organic isocyanates |
| 06/09/1996 | CA2164383A1 Continuous process for the preparation of organic isocyanates |
| 06/04/1996 | US5523467 Process for the preparation of aliphatic polyisocyanates |
| 05/30/1996 | WO1996016028A1 Process for preparing isocyanates |
| 05/30/1996 | CA2204403A1 Process for preparing isocyanates |
| 05/29/1996 | EP0713871A1 Process for the preparation of 3,5-dimethylpyrazol blocked polyisocyanates |
| 05/23/1996 | DE19542245A1 Phosgenating process |
| 05/23/1996 | DE19521800A1 Verfahren zur Herstellung von Isocyanaten A process for the preparation of isocyanates |
| 05/14/1996 | US5516935 Phosgenation of diamine |
| 04/16/1996 | CA2036538C Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number |
| 04/10/1996 | CN1119959A A process and a device for seperating a solid residue from its solution in a strirred bed of material |
| 04/09/1996 | US5506301 Mixing with acidified water having organic material such as limonene and terpinene; by-product from phosgenation process |
| 03/26/1996 | US5502244 Decomposing a carbamate with sulfonic acid catalyst |
| 03/20/1996 | EP0702000A1 Process for adjusting a certain amount of iron in diphenylmethane diisocyanate or in polyisocyanate mixtures of the diphenylmethane diisocyanate series |
| 03/20/1996 | CA2158414A1 Process for reducing the iron content in diphenylmethane diisocyanate or in polyisocyanate mixtures of the diphenylmethane series |
| 03/06/1996 | EP0699659A2 Process and device for separating a solid residue from its solution in stirred material bed |
| 03/06/1996 | EP0699658A1 Process for preparing liquid diphenylmethane diisocyanate |
| 03/06/1996 | EP0699657A1 Process for the preparation of aromatic polyisocyanate compounds in gas phase |
| 03/01/1996 | CA2157099A1 Process and a device for separating a solid residue from its solution in a stirred bed of material |
| 02/22/1996 | WO1996005171A1 4,4'-methylen-bis-(3-chloro-2,6-dialkylphenylisocyanates) and polyurethane systems containing the same |
| 02/22/1996 | CA2197560A1 4,4'-methylene-bis-(3-chloro-2,6-dialkylphenyl isocyanates) and polyurethane systems containing same |
| 01/16/1996 | US5484916 Catalytic dimerization |
| 01/16/1996 | US5484819 Acidifying polymethylenepolyphenylenepolyamine before phosgenation to produce polymethylenepolyphenylamine polyisocyanate |
| 11/22/1995 | EP0683154A1 Diisocyanates, process for their preparation and their use |
| 11/21/1995 | US5468783 Modified aromatic polyisocyanates and their use for the production of rigid foamed materials |
| 11/18/1995 | CA2149275A1 Diisocyanates and processes for their production and use |
| 11/14/1995 | US5466429 Process for preparing isocyanic acid from cyanuric acid |
| 11/08/1995 | EP0680466A1 Process for preparing isocyanates. |
| 10/26/1995 | DE4413580A1 Prodn. of 1,4-butylene di:isocyanate from 1,4-butane-di:amine |
| 10/17/1995 | US5458793 Compositions useful as additives for lubricants and liquid fuels |
| 10/12/1995 | CA2146522A1 Process for the production of diisocyanates |
| 10/11/1995 | EP0676392A1 Process for the preparation of diisocyanates |
| 10/11/1995 | EP0676391A1 Process for the preparation of isocyanates or isocyanate mixtures and their use for the manufacture of light coloured foams |
| 10/10/1995 | US5457229 Process for preparing isocyanates from urethanes by a novel technique |
| 10/08/1995 | CA2146512A1 Process for the production of isocyanates and for the production of light colored foams therefrom |
| 10/05/1995 | WO1995026332A1 Obtaining toluene 2,6-diisocyanate from a mixture containing toluene 2,6-diisocyanate and toluene 2,4-diisocyanate |
| 10/03/1995 | US5455374 Liquification of trans, trans-4,4'-diisocyanate dicyclohexylmethane by partially reacting the isocyanate groups with blocking agents |
| 09/28/1995 | DE19510259A1 Aliphatic poly:isocyanate prodn. |
| 09/26/1995 | US5453536 By pyrolysis under mild conditions in the absence of solvent and catalyst; preparation of polyurethanes |
| 09/20/1995 | EP0672653A1 Process for producing isocyanates |
| 09/19/1995 | US5451697 Carbon dioxide and primary amine |
| 09/14/1995 | WO1995024384A1 Polycarbamates, process for preparing polycarbamates, and process for preparing polyisocyanates |
| 09/13/1995 | EP0671385A1 Method for handling (2-alkyl) acryloyl isocyanate, method for producing (2-alkyl)acryloyl isocyanate, heterocyclic compound, and method for producing heterocyclic compound |
| 09/12/1995 | US5449818 Reaction of diamine with phosgene to form diisocyanate |
| 09/12/1995 | US5449817 Process for the preparation of organic isocyanates |
| 08/29/1995 | US5446196 Process for the production of isocyanates and for the continuous working-up of the residue |
| 07/06/1995 | WO1995018098A1 Process for preparing isocyanates |
| 07/05/1995 | EP0661278A1 Blocked polyisocyanates |
| 07/01/1995 | CA2139365A1 Masked polyisocyanates; process for preparing the same and process for preparing polymers from said masked polyisocyanates |
| 06/20/1995 | CA1335992C Process for the production of polyisocyanates containing isocyanurate groups and their use |
| 06/14/1995 | EP0657420A1 Process for the preparation of diurethanes and their use in the preparation of diisocyanates |
| 06/14/1995 | CA2137713A1 Process for the production of diurethanes and their use for the production of diisocyanates |
| 06/13/1995 | US5424386 Modified aromatic polyisocyanates and their use for the production of rigid foamed materials |
| 05/10/1995 | EP0425596B1 A process for distillation of crude isocyanate concentrates |
| 03/29/1995 | EP0645372A1 Stable polyisocyanate mixtures prepared by phosgen-free processes and a process for their preparation |
| 03/28/1995 | US5401819 Thermally decomposing an azidofumarate ester in the presence of an isomerization catalyst and removing isocyanatoacrylate ester product from solution |
| 03/21/1995 | US5399736 Process for the preparation of highly pure aromatic diurethanes and/or polyurethanes |
| 03/15/1995 | EP0643042A1 Storage-stable polyisocyanate mixtures prepared by phosgen-free processes, a process for their preparation and their use |
| 03/15/1995 | EP0643041A1 Process for the preparation of isocyanic acid from cyanuric acid |
| 03/14/1995 | CA2130685A1 Stable polyisocyanate compositions obtainable by phosgene-free methods and their preparation |
| 03/14/1995 | CA2130684A1 Polyisocyanate compositions having a long shelf life and obtainable by phosgene-free methods, their preparation and their use |
| 03/01/1995 | EP0640071A1 Use of liquid esters as solvents for isocyanates |
| 03/01/1995 | CN1099384A Process for preparing isocyanates |
| 02/22/1995 | CN1099026A A process for the production of isocyanates and for the continuous working-up of the residue |
| 02/21/1995 | US5391683 Preparation of aromatic polyisocyanates |
| 01/31/1995 | US5386059 Process for preparing polyamines for lighter color polyisocyanate based foam |
| 01/31/1995 | US5386057 Process for the preparation of acyl isocyanates |
| 01/31/1995 | US5386054 Process for the purification of polyisocyanates, the polyisocyanates thus purified and use thereof |
| 01/31/1995 | US5386053 Multistep, continuous preparation of organic polyisocyanates |
| 01/31/1995 | CA1334232C Process for the production of polyisocyanates containing allophanate groups |
| 01/12/1995 | DE4322548A1 Process for the disposal of solid residues of toluylene diisocyanate preparation |
| 12/31/1994 | CA2125613A1 Liquification of diphenylmethane diisocyanate by partially reacting the isocyanate groups with blocking agents |
| 12/31/1994 | CA2125362A1 Liquification of trans, trans-4, 4'-diisocyanate dicyclohexylmethane by partially reacting the isocyanate groups with blocking agents |
| 12/01/1994 | DE4318018A1 Process for the preparation of organic isocyanates, in particular mixtures of diphenylmethane diisocyanates and polymethylene polyphenylene polyisocyanates, with reduced colour number |
| 11/30/1994 | EP0626368A1 Process for preparing isocyanates and continuous treatment of the residue |
| 11/28/1994 | CA2124287A1 Process for the production of isocyanates and for the continuous working-up of the residue |
| 11/17/1994 | EP0624638A1 Compositions useful as additives for lubricants and liquid fuels |