| Patents for C07C 263 - Preparation of derivatives of isocyanic acid (3,065) |
|---|
| 05/04/1993 | US5208368 Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates of reduced iodine color number |
| 05/04/1993 | US5207942 Preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates having a reduced iodine color number |
| 05/04/1993 | CA1317311C Liquid diphenylmethane diisocyanate compositions |
| 05/04/1993 | CA1317306C Process for the continuous preparation of monoisocyanates or polyisocyanates |
| 04/28/1993 | EP0538500A1 Process for the preparation of polymeric methylendiphenylene diisocyanate having reduced color and chloride content |
| 04/27/1993 | US5206412 Reacting alkylphenylcarbamate with methylene bis(alkyl carbamate); acid catlayst |
| 04/14/1993 | EP0536605A2 Free-flowing solids based on 4,4'-diisocyanato dicyclohexylmethane |
| 04/13/1993 | US5202358 Process for the preparation of liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups and their use for the preparation of polyurethane plastics |
| 04/09/1993 | CA2077793A1 Free-flowing solids based on 4, 4'-diisocyanato dicyclohexylmethane |
| 04/06/1993 | CA1315799C Process for the production of polyisocyanates with biuret structures |
| 03/23/1993 | US5196572 Thermal decomposition of xylylene dicarbamate with tin and/or antimony containing catalyst |
| 03/17/1993 | EP0531803A2 Method for preventing coloration of aromatic isocyanate compounds |
| 03/16/1993 | US5194660 Processes for producing carbamates and isocyanates |
| 03/10/1993 | CA2077632A1 Method for preventing coloration of aromatic isocyanate compounds |
| 02/24/1993 | EP0528299A2 Method of recovery of polyisocyanates from distillation residues of tolueredi-isocyanate preparation |
| 02/23/1993 | US5189205 Process for preparing isocyanates |
| 02/21/1993 | CA2076246A1 Process for recovering polyisocyanates from the distillation residues obtained in the production of tolylene diisocyanate |
| 02/09/1993 | US5185384 Method for reducing hydrolyzable chloride in toluene diisocyanate |
| 01/27/1993 | EP0524554A2 Reactor and process for thermal clearage of carbonic acid esters |
| 01/27/1993 | EP0524511A1 Process for the preparation of aqueous dispersions of blocked polyisocyanates |
| 01/27/1993 | EP0524507A1 Process for the purification of polyisocyanates |
| 01/26/1993 | CA1313192C Process for separating a feed mixture comprising 2,6- toluene diisocyanate and 2,4-toluene diisocyanate |
| 01/24/1993 | CA2074226A1 Process for the purification of polyisocyanates, the polyisocyanates thus purified and their use |
| 01/24/1993 | CA2072902A1 Aqueous dispersions of blocked polyisocyanates |
| 01/12/1993 | US5179227 Warming a solid third fraction and removal of melt to obtain high purity p,p-diphenylmethanediisocyanate |
| 12/29/1992 | US5175350 Melt crystallization process for preparing high trans, trans-isomer containing 4,4'-diisocyanato dicyclohexylmethane |
| 12/29/1992 | US5175349 Stabilization of organic polyisocyanates |
| 12/10/1992 | DE4118914A1 Light coloured mixts. of di:phenylmethane di:isocyanate cpds. - and poly:phenyl poly:methylene poly:isocyanate cpds. are prepd. by treating reaction mixt. with a chloroformate and heating |
| 12/08/1992 | CA1311245C Process for the separation of toluene diisocyanate contained in process residues |
| 12/02/1992 | EP0515933A2 Process for the preparation of fluid and storage stable organic isocyanates containing carbodiimide uretonimino groups, and their use in the preparation of polyurethane resins |
| 11/26/1992 | DE4116658A1 Polyfunctional siloxy-alkyl ester(s) - by reaction of tri:organo:silyl ester(s) of polybasic carboxylic acids with epoxide cpds. |
| 11/24/1992 | US5166414 Reacting a formamide or amine compound with dimethyl carbonate using an alkali catalyst; thermal decomposition of the resulting urethane compound |
| 11/10/1992 | US5162575 Reacting organic base with halogenated amide in solvent |
| 11/04/1992 | EP0511572A1 Amine and ammonium isocyanates, method of preparation, their use in preparing ammonium group containing polymers and the polymers thus prepared |
| 11/03/1992 | CA1309724C Diisocyanates and a process for their preparation |
| 11/03/1992 | CA1309721C Process for the continuous production of mono- and polyisocyanates |
| 11/02/1992 | CA2067401A1 Amino and ammonium isocyanates, a process for their preparation, their use for the production of polymers containing ammonium groups and the polymers thus produced |
| 10/28/1992 | EP0510459A2 Process for the preparation of poly(o-alkylurethanes) of the diphenyl methane series |
| 10/24/1992 | CA2066480A1 Process for the production of poly(o-alkylurethanes) of the diphenyl methane series |
| 10/21/1992 | EP0509303A1 Method of production of beta-halo-t-alkylisocyanates |
| 10/15/1992 | WO1992017442A1 Process for the preparation of isocyanates and carbamates using a silver salt promoted hofmann rearrangement |
| 10/14/1992 | EP0508279A1 Method of production of beta-halo-t-alkylisocyanates |
| 10/14/1992 | EP0508216A1 Method for the conditioning and/or purification of organic isocyanates |
| 09/23/1992 | EP0505150A1 Stabilizing method of isocyanate compounds and isocyanate compositions stabilized thereby |
| 09/22/1992 | US5149805 Blocked with caprolactam, methyl ethyl ketoxime or diisobutyl ketoxime |
| 09/08/1992 | CA1307285C Process for the production of isocyanates |
| 09/02/1992 | CN1064074A Process for reducing hydrolyzable chloride in toluene diisocyanate |
| 09/01/1992 | US5143944 Nonfugitive catalyst, high activity |
| 08/20/1992 | DE4104305A1 Processing of distillate residue from toluene di:isocyanate mfr. - comprises mixing with aromatic solvents e.g. toluene |
| 08/05/1992 | EP0497538A2 Process for reducing hydrolyzable chloride in toluene diisocyanate |
| 08/04/1992 | US5136087 Preparation of polymethylene polyphenyl polyisocyanate |
| 08/04/1992 | US5136086 Reacting diamine with gaseous hydrogen chloride and phosgene in ester solvent |
| 07/14/1992 | US5130466 Formation of a polyurethane from a diisocyanate containing an ester group |
| 07/14/1992 | CA1305165C Process for the preparation of (cyclo)aliphatic diisocyanates |
| 07/14/1992 | CA1305162C Process for the production of isocyanates |
| 07/01/1992 | EP0492556A1 Continuous process for the preparation of isocyanates |
| 07/01/1992 | EP0492145A2 Process for producing xylylene diisocyanate |
| 06/30/1992 | US5126480 Catalytic cracking of amides |
| 06/30/1992 | US5126479 Process for the production of blocked polyisocyanates containing carbodiimide groups, the polyisocyanates obtainable by this process and their use for the production of plastics |
| 06/30/1992 | US5126476 Reaction of aromatic compound with alkylenebis(alkyl carbamate) in presence of acid catalyst and polar aprotic solv ent |
| 06/30/1992 | CA1304399C Process for the purification and the isolation of isocyanate condensates by liquid or supercritical co _extraction |
| 06/30/1992 | CA1304392C Process for the preparation of substituted 3,5- dichloro-2,4-difluoro-benzenes |
| 06/25/1992 | DE4041516A1 Organic esp. aromatic poly:isocyanate stabilisation, for paint mfr. |
| 06/16/1992 | CA1303623C Preparation of cyclohexyl mono- and diurethanes and isocyanates derivedtherefrom by addition of methylcarbamates to limonene, process and compositions |
| 05/26/1992 | US5117048 Process for the continuous preparation of monoisocyanates or polyisocyanates |
| 05/06/1992 | CN1060836A Fractionation process of reaction mixture containing methylene bridged polyphenylene polyisocyanate |
| 04/29/1992 | EP0482490A2 Fractionation process of reaction mixture containing methylene bridged polyphenylene polyisocyanate |
| 04/28/1992 | US5109034 Storage stable solid isocyanate compositions, preparation, and method of use thereof |
| 04/15/1992 | EP0480493A2 Processes for the preparation of nitrogen-containing compounds |
| 03/21/1992 | CA2051594A1 Processes for the preparation of nitrogen-containing compounds |
| 03/17/1992 | US5096994 Low viscosity |
| 03/17/1992 | CA1297490C Preparation of a novel diisocyanate from norbornadiene |
| 03/17/1992 | CA1297488C Method of preparation of novel 2-(alkoxymethyl)- pentane-1,5-diisocyanates, 2-(alkoxymethyl)-pentane-1, 5-diurethanes, and 2-(alkoxymethyl)-pentane-1,5- dicarbamic acid chlorides and their uses |
| 03/10/1992 | US5095147 2,2-difluorocyclopropyl derivatives |
| 03/04/1992 | EP0473290A2 Multilayer reverse osmosis membrane of polyamide-urea |
| 02/25/1992 | US5091553 Reacting adduct of isocyanic acid and tertiary amine with unsaturated compound |
| 02/25/1992 | CA1296350C 6-isocyanato caproic acid (3-isocyanato-2,2-dimethyl-1- propyl)-ester |
| 02/18/1992 | CA1296016C Process for the preparation of isophorone diisocyanate from isophorone dicarbamyl esters using highly selective sno_or cuo catalysts |
| 02/12/1992 | EP0470711A1 Fungicides |
| 02/11/1992 | US5087739 From diamines, urea, alcohols and by-products from thermal cracking |
| 02/04/1992 | CA1295338C Process for the preparation of organic isocyanates |
| 01/22/1992 | EP0467125A1 Process for the preparation of mixtures of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates with a reduced iodic colorimetric measure |
| 01/14/1992 | US5081288 Process for the preparation of substituted 3,5-dichloro-2,4-difluoro-benzenes |
| 01/08/1992 | EP0464781A1 Process for the preparation of aqueous polyisocyanate emulsions and emulsions obtained thereby |
| 01/07/1992 | US5078980 Process for the removal of isocyanic acid from a mixture of isocyanic acid and ammonia |
| 11/26/1991 | US5068402 Stabilized polyisocyanates |
| 11/12/1991 | CA1292006C Process for the production of diisocyanates, selected diisocyanates produced thereby and the production of polyurethane plastics therefrom |
| 11/06/1991 | CN1014606B Continuous preparation method of monoisocyanate or polyisocyanate |
| 10/31/1991 | CA2041411A1 Stack emission control system for removing organic pollutants from air |
| 10/30/1991 | EP0453914A2 Melt crystallization process for preparing high trans, trans-isomer containing 4,4'-diisocyanato dicyclohexylmethane |
| 10/25/1991 | CA2039544A1 Melt crystallization process for preparing high trans,trans-isomer containing 4,4'-diisocyanato dicyclohexylmethane |
| 10/02/1991 | EP0449110A2 2,2-Dialkylpentane-1,5-diisocyanates, -diurethanes, and -dicarbamic acid chlorides, process for their preparation and their use |
| 09/17/1991 | CA1289146C Diisocyanates, a process for their production and their use in the production of polyurethane plastics |
| 09/12/1991 | DE4007074A1 Organic esp. aromatic poly:isocyanate stabilisation, for paint mfr. |
| 09/12/1991 | DE4006978A1 Light coloured mixt. - is of di:phenylmethane di:isocyanate cpds. and higher poly-isocyanate cpds. and is obtd. by reacting with tri: or di:alkyl phosphite |
| 09/11/1991 | EP0445608A2 Stabilisation of organic polyisocyanates |
| 09/11/1991 | EP0445602A2 Process for the preparation of mixtures of diphenylmethane-diisocyanates and polyphenylmethylene-polyisocyanates with a reduced iodic colorimetric measure |
| 09/08/1991 | CA2037085A1 Stabilization of organic polyisocyanates |
| 08/28/1991 | EP0443139A1 Process for preparing high trans, trans-isomer containing 4,4'-diisocyanato dicyclohexylmethane |
| 08/27/1991 | US5043472 Crystalline structure |