| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
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| 11/15/1994 | US5364958 Process for the production of methylene-crosslinked polyphenylene polyisocyanate |
| 11/14/1994 | CA2124697A1 Compositions useful as additives for lubricants and liquid fuels |
| 11/09/1994 | EP0623591A1 Olefinically unsaturated isocyanates and their use as binder in coating materials |
| 11/02/1994 | CN1094395A Preparation of aromatic isocyanate type composition in gas phase |
| 11/01/1994 | US5360931 Condensation of urea with diamine in alcohol solvent to give bisurea and reaction with alcohol to form bis carbamate, distillation and cleavage in rectification column |
| 10/31/1994 | CA2122177A1 Olefinically unsaturated isocyanates, a method for their production and their use in one-component coating compositions |
| 10/25/1994 | US5359129 Stabilizing with hindered amine |
| 10/11/1994 | US5354432 Recovering diisocyanate from residues by distilling in high boiling bitumens |
| 09/27/1994 | US5350825 At least partially blocked organic polyisocyanates, a process for their preparation and their use in coating compositions |
| 09/21/1994 | CN1092408A Process for preparing isocyanate and carbamate ester products |
| 09/20/1994 | US5349082 Toluene diisocyanate residue |
| 09/20/1994 | US5349081 Dehydration, primary amine and carbon dioxide |
| 09/20/1994 | CA2117147A1 Toluene diisocyanate residue |
| 09/13/1994 | US5347034 Process for the production of poly(O-alkylurethanes) of the diphenyl methane series |
| 09/08/1994 | DE4407019A1 Process for the preparation of cycloaliphatic urethanes |
| 09/06/1994 | US5344965 Preparation of a novel diisocyanate from norbornadiene |
| 08/31/1994 | EP0612722A2 Isocyanate-substituted isophthaloyl chlorides |
| 08/30/1994 | US5342881 Process for the standardization and stabilization of organic polyisocyanates and the stable products of this process |
| 08/17/1994 | EP0611243A1 Process for the preparation of organic isocyanates |
| 08/17/1994 | CN1090841A Process for preparing isocyanates |
| 08/04/1994 | WO1994017032A1 Process for preparing isocyanates |
| 08/02/1994 | US5334637 Isocyanatocarboxylic acids, a process for their preparation and their use in coating compositions as cross-linking agents |
| 07/21/1994 | DE4300774A1 Reducing discoloration in crude di:phenyl-methane di:isocyanate prodn. |
| 07/13/1994 | EP0323514B1 Process for preparing isocyanate compounds |
| 07/05/1994 | US5326903 Thermal decomposition of carbamate |
| 06/29/1994 | EP0603700A1 Method for preventing coloration of diphenylmethane diisocyanate compound |
| 06/25/1994 | CA2111928A1 Method for preventing coloration of diphenylmethane diisocyanate compound |
| 06/08/1994 | EP0600314A1 Organic polyisocyanates having at least partially blocked isocyanate groups |
| 06/07/1994 | US5319133 Isocyanates and their preparation using hypochlorous acid |
| 05/24/1994 | US5315034 Procedure for the preparation of alkyl isocyanates |
| 05/24/1994 | US5314588 Reaction with a diphenylmethane diisocyanate |
| 05/17/1994 | US5312971 Phosgenating corresponding polyamines in solution in inert solvent, removing excess phosgene, stripping solvent; adding reducing agent to polyamines at any time prior to stripping |
| 05/10/1994 | US5310849 Reaction of aminoalkylureas with isocyanates followed by thermal decomposition |
| 05/10/1994 | US5310769 Reaction of aniline and formaldehyde, phosgenation, polyurethane from that diisocyanate which has a lighter color |
| 04/28/1994 | WO1994008953A1 Process for preparing isocyanate and carbamate ester products |
| 04/28/1994 | WO1994008951A1 Process for preparing isocyanates from primary amines, carbon dioxide and a dehydrating agent |
| 04/21/1994 | DE4223847C1 Regenerating catalytic metal filler bodies used in gas phase cleavage of urethane - by treating at elevated temp. with hydrogen contg. gas |
| 04/20/1994 | EP0593334A1 Process for the preparation of aromatic isocyanate compounds in gazeous phase |
| 04/13/1994 | CN1085209A Process for the preparation of isocyanates by the decomposition of N,N,N¨-trisubstituted ureas |
| 04/12/1994 | US5302749 Adding phenol to suppress yellowing and turbidity during storage |
| 04/07/1994 | DE4233534A1 Isocyanate cpds. prodn. from N,N,N'-tri-substd. urea cpds. |
| 04/05/1994 | US5300616 Process for isolating polyisocyanate isomers from polyisocyanate mixtures |
| 03/30/1994 | CN1084507A Process for the production of methylene-crosslinked polyphenylene polyisocyanate |
| 03/29/1994 | US5298651 Process for preparing isocyanates using phosphazine catalysts |
| 03/22/1994 | US5296160 Aqueous dispersions of blocked polyisocyanates |
| 03/02/1994 | EP0585165A1 Process for the preparation of acyl isocyanates |
| 02/23/1994 | EP0583637A1 Process for the preparation of isocyanes by decomposition of N,N,N'-trisubstituted ureas |
| 02/22/1994 | US5288899 Liquification of diphenylmethane diisocyanate by partially reacting the isocyanate groups with blocking agents |
| 02/14/1994 | CA2100718A1 Process for the preparation of isocyanates by the decomposition of n,n,n'-trisubstituted ureas |
| 02/10/1994 | DE4302084C1 Prodn. of isocyanato-substd. ester intermediates for polymers - comprises pyrolysis of carbamate-substd. ester in presence of organo-tin catalyst |
| 02/08/1994 | US5284969 Process for the production of polyisocyanates |
| 02/02/1994 | EP0581100A1 Color reduction of polymethylene polyphenyl polyisocyanates |
| 01/24/1994 | CA2098949A1 Color reduction of polymethylene polyphenyl polyisocyanates |
| 12/08/1993 | EP0572994A1 Process for the preparation of urethdione groups-containing polyisocyanates |
| 12/01/1993 | EP0571845A2 Process for standardizing and stabilising of organic polyisocyanates and their use |
| 11/25/1993 | WO1993023367A1 Use of liquid esters as solvents for isocyanates |
| 11/24/1993 | EP0570799A1 Process for the preparation of aromatic diisocyanates |
| 11/18/1993 | EP0570071A1 Procedure for the preparation of alkyl isocyanates |
| 11/18/1993 | DE4215873A1 Verwendung von flüssigen Estern als Lösungsmittel für Isocyanate Use of liquid esters as solvents for isocyanates |
| 11/18/1993 | DE4215761A1 Prepn. of crude phenyl methane or methylene isocyanate(s) mixts. - where obtd. mixt. are useful for prepn. of e.g. urethane] foams and polyurethane prods., having a reduced iodine number |
| 11/10/1993 | EP0568782A2 Continuous and multistep process for the preparation of (cyclo)-aliphatic diisocyanates |
| 11/09/1993 | US5260481 Process for the conditioning and/or purification of organic isocyanates |
| 11/06/1993 | CA2095417A1 Continuous multi-stage process for the preparation of (cyclo)aliphatic diisocyanates |
| 11/03/1993 | EP0567881A2 Process for the preparation of polyamine mixtures of the polyamino-polyaryl-polymethylene series |
| 11/02/1993 | US5258548 Method for preventing coloration of aromatic isocyanate compounds |
| 11/02/1993 | US5258417 Low viscosity polymeric MDI |
| 10/27/1993 | EP0566925A2 Multi-step method for the continuous preparation of organic polyisocyanates |
| 10/20/1993 | EP0566555A2 Process for preparing isocyanates |
| 10/20/1993 | EP0565931A1 Modified aromatic polyisocyanates and their use in the production of hardened urethane foams |
| 10/09/1993 | CA2093368A1 Modified aromatic polyisocyanates and their use for the production of rigid foamed materials |
| 09/22/1993 | EP0561568A1 Polyisocyanate composition |
| 09/22/1993 | EP0561225A2 Process for the preparation of isocyanates or isocyanate mixtures and their use in the preparation of polyurethane foams |
| 09/17/1993 | CA2092623A1 Process for the preparation of isocyanates or isocyanate mixtures useful for the preparation of polyurethane foams |
| 09/17/1993 | CA2091649A1 Polysocyanate composition |
| 09/14/1993 | US5245076 Herbicides |
| 08/18/1993 | EP0555628A2 Process for preparing isocyanates |
| 08/03/1993 | US5233079 Trans configuration isomers |
| 08/03/1993 | US5233010 Reacting carbon dioxide and an aromatic diamine in an aprotic solvent and a base to produce a carbamate salt; dehydration; reacting an amide with nitrobenzene and reducing to obtain the amine |
| 07/31/1993 | CA2088091A1 3-quinuclidinol catalyst compositions for making polyurethane foams |
| 07/27/1993 | CA1320784C Process for the production of modified polyisocyanates, the polyisocyanates obtainable by this process and their use as binders or as a binder component |
| 07/14/1993 | EP0550908A2 Process for the insulation of polyisocyanate isomers from poly-isocyanate mixtures |
| 07/08/1993 | CA2086651A1 Process for isolating polyisocyanate isomers from polyisocyanate mixtures |
| 06/30/1993 | EP0548685A2 Method for preparing isocyanates and treatment of residue |
| 06/30/1993 | EP0548669A2 Isocyanato carboxylic acids, a method for their preparation and their use |
| 06/24/1993 | CA2085947A1 Process for the production of isocyanates and for working up the residue |
| 06/23/1993 | EP0547444A1 Process for the preparation of high-purity aromatic di- and/or polyurethanes |
| 06/17/1993 | CA2085284A1 A process for the preparation of highly pure aromatic diurethanes and/or polyurethanes |
| 06/16/1993 | EP0546400A2 A process for preparing polyamines and polyisocyanates |
| 06/16/1993 | EP0546398A2 A process for preparing polyamines for lighter color polyisocyanate based foam |
| 06/15/1993 | US5220069 Catalytic decarboxylation of carbamates to produce amines |
| 06/15/1993 | US5220061 Slowyly mixing n,n dialkyl-n-phenylurea and methylene bis/ alkyl carbamate/ with acid catalyst; heating |
| 06/11/1993 | CA2084156A1 Process for preparing polyamides and polyisocyanates |
| 06/01/1993 | US5216042 Purging with solvent and/or gas to remove chloride containing vapors; polyurethanes; polyureas; rigid foams |
| 06/01/1993 | CA1318683C Circulation process for the production of aliphatic and cycloaliphatic diisocyanates |
| 05/19/1993 | EP0542106A2 Process for the preparation of polyisocyanates |
| 05/18/1993 | CA1317966C Preparation of substituted benzotrichlorides |
| 05/18/1993 | CA1317965C Stabilized polyisocyanates |
| 05/18/1993 | CA1317949C Isocyanates derived from dienes and process and their preparation |
| 05/11/1993 | US5210285 Chlorination of tert-alkyl isocyanates under irradiation or in the presence of catalysts |
| 05/11/1993 | US5210284 Boiling, solvents, evaporation, recovering |