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Matches 301 - 350 out of 1,719

Document Document Title
WO/2001/017951A1
The invention relates to a method for producing aliphatic, cycloaliphatic, araliphatic and aromatic monoisocyanates and oligoisocyanates by phosgenating the corresponding primary amines at normal pressure. The inventive method is charact...  
WO/2001/002347A1
The invention concerns a method for dehydrogenofluorination for transforming an aromatic carbamoyl fluoride into the corresponding isocyanate. Said method is characterised in that it consists in subjecting said carbamoyl fluoride to a te...  
WO/2001/000569A1
The invention relates to light isocyanates, to a method for producing light isocyanates and to their use in urethane compounds, especially in polyurethane, for example polyurethane foams.  
WO/2000/042009A1
The invention concerns the use of isocyanates obtained from amino acid derivatives for preparing and optionally isolating stable activated carbamic acid derivatives, or stable activated carbamates.  
WO/2000/040524A1
Disclosed is a method of preparing an aromatic compound having general formula (I) where R is CF¿3?, OCF¿3?, OC¿2?F¿5?, CN, NCO, or COCl, m is 0, 1, or 2, n is 0, 1, or 2, q is 1 or 2, and q+m+n is an integer from 1 to 5. A vapor is ...  
WO/1999/065868A1
The invention relates to a method for treating distillation residues from the synthesis of toluene diisocyanate by reacting the distillation residues with water. The invention is characterized in that the TDI distillation residues are re...  
WO/1999/054289A1
The invention relates to a 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 ...  
WO/1999/048863A1
The present invention relates to the use of 3.5-Di.tert.-butyl-4-hydroxy-phenyl propionic acid esters for stabilisation of organic polyisocyanates.  
WO/1999/047493A1
Organic carbamates are prepared by the reaction of organic amines (preferably aromatic polyamines) with heteroatom-substituted alkyl carbonates. Said carbamates can be thermolysed into the corresponding isocyanates.  
WO/1999/041218A1
The present invention relates to a method of making alpha-methylstyrene dimers by combining a cobalt catalyst, a free-radical initiator and an alpha-methylstyrene monomer, in an inert atmosphere, to form a mixture. The mixture is heated ...  
WO/1999/040059A1
The invention relates to a method for the production of methylenedi(phenylamine) by reacting aniline with formaldehyde in the presence of acid catalysts. The method is characterized in that aniline and optionally an acid catalyst are tre...  
WO/1999/001428A1
Hydrazine derivatives of formula (I) wherein Y signifies CO or SO¿2?; R?1¿ signifies lower alkyl, lower alkenyl, lower cycloalkyl, lower cycloalkyl-lower alkyl, aryl or aryl-lower alkyl; R?2¿ signifies lower alkyl, halo-lower alkyl, a...  
WO/1998/056758A1
Process for the production of organic isocyanates comprising the following steps: (1) reacting an amine compound with an organic carbonate in the presence of a catalyst and an organic solvent; (2) removing the catalyst; (3) thermally dec...  
WO/1998/054129A1
Method for the preparation of polymeric isocyanates by decomposing polymeric ureas of the formula: R?1�(NHCONR?2�R?3�)�x? wherein x is at least 2, R?1� is an organic radical of valency x and R?2� and R?3� are monovalent org...  
WO/1998/054128A1
Method for the preparation of aromatic monomeric or polymeric isocyanates by decomposing aromatic monomeric or polymeric carbamates of the formula R?1�(NHCOOR?2�)�x? wherein x is at least 1, R?1� is an aromatic radical of valency...  
WO/1998/025889A1
The invention concerns a method of separating a crystallizable organic compound from a liquid compound mixture by means of a single- or multi-stage suspension crystallization method, the crystals behind the final stage being separated by...  
WO/1998/025888A1
Isocyanates are prepared by the 'cold-hot phosgenation' of primary amines which are not readily dissolved in chlorobenzene and/or o-dichlorobenzene. According to this process phosgene is dissolved in a solvent (A) consisting of chloroben...  
WO/1998/025680A1
The invention concerns a method of separating organic compounds by single- or multi-stage suspension crystallization, each stage consisting of a crystallizer, optionally a crystallizer vessel, and a filter (7) for separating the liquid p...  
WO/1998/022520A1
The invention relates to polyisocyanates containing tin in the form of compounds of quadrivalent and/or bivalent tin in a quantity ranging from 0.1 to 20 ppm tin with respect to the mass of the polyisocyanate, the polyurethane and/or the...  
WO/1998/019993A1
The invention concerns a process for obtaining pure isocyanate isomers from an isocyanate isomer mixture by crystallization in suspension and separation of isomerically pure crystals. The process is characterized in that, before separati...  
WO/1998/014425A1
This invention describes a method of forming bisulphite adducts of aliphatic isocyanates bearing an aromatic moiety by mixing an aqueous solution of a bisulphite adduct forming agent with a solution of an isocyanate bearing an aromatic m...  
WO/1997/045399A1
The invention discloses a product useful as monomer. This product is characterised in that when it is subjected to the action of an amount of phosphine of 0.005 mol per isocyanate function equivalent for one and a half hours at a tempera...  
WO/1997/031960A1
A composition containing one or more isocyanates that advantageously are not completely masked is disclosed. The composition includes a compound having an anionic function and a polyethylene glycol chain fragment of at least 5 and advant...  
WO/1997/025308A1
Products prepared by reacting polyisocyanates with alkenyl or alkynyl compounds; then with perfluoroalkyl iodides and dehydroiodinating the product.  
WO/1997/024320A1
A process and a system produces isocyanate and converts anhydrous hydrogen chloride, which is a by-product of isocyanate production, to chlorine gas in an electrochemical cell. The chlorine is recycled to the isocyanate process. Any unre...  
WO/1997/017323A1
The invention concerns a method of producing organic di- and/or polyurethanes by reacting organic di- and/or polyamines (a) with urea and/or carbamic acid alkyl esters (b) and alcohols (c) in the presence of soluble zirconium compounds, ...  
WO/1997/007092A1
Solid polyisocyanate particles having a particle size distribution index (PSDI) of less than 1.5 and which are preferably substantially free of induced impurities. Also claimed is a method for the preparation of such particles by prilling.  
WO/1996/016028A1
Isocyanates are prepared by a continuous process, by reacting appropriate primary amines with phosgene in the presence of an isocyanate as solvent. The primary amine optionally dissolved in an inert organic solvent is reacted with phosge...  
WO/1996/005171A1
4,4'-methylen-bis(3-chloro-2,6-dialkylphenylisocyanates) having the general formula (I) form polyisocyanates useful for producing polyurethane systems with high chemical resistance and good thermal stability.  
WO/1995/026332A1
A method for obtaining substantially pure toluene 2,6-diisocyanate from a mixture of the 2,4 and 2,6 isomers of toluene diisocyanate, wherein at least one crystallising-melting cycle is performed on the mixture of said isomers to separat...  
WO/1995/024384A1
Polycarbamates of a polyisocyanate and secondary alcohols are disclosed. These carbamates are characterized in being readily pyrolyzed to form the corresponding polyisocyanate and alcohol with low formation of tars and other by-products....  
WO/1995/018098A1
A process for preparing isocyanates comprising contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and a base selected from the group consisting of a phosphazene compound, an organic, nitrogenous b...  
WO/1994/017032A1
A process for preparing isocyanates comprising (a) contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and a base selected from the group consisting of a phosphazene compound, an organic, nitrogeno...  
WO/1994/008951A1
A process for preparing isocyanates comprising (a) contacting carbon dioxide and a primary amine in the presence of an aprotic organic solvent and a phosphazene compound or a mixture of a phosphazene compound and an organic, nitrogenous ...  
WO/1994/008953A1
A process for preparing an isocyanate having at least two -N=C=O groups is provided which comprises preparing a substituted aromatic amine having at least two -NH2 groups, recovering the substituted aromatic amine having at least two -NH...  
WO/1993/023367A1
Esters that are liquid at room temperature are used as solvents for isocyanates and/or isocyanurates and allow the viscosity of the isocyanates and/or isocyanurates to be drastically reduced.  
WO/1992/017442A1
The present invention relates to a process for producing isocyanates which comprises reacting an N-halogenated amide with an organic base in an essentially water-free modified Hofmann reaction using a soluble silver salt promoter in the ...  
WO/1990/009990A1
A process is described for the separation and recovery of isocyanate monomers from isocyanate concentrates which leaves a residue which is liquid and burnable. The process for the separation and recovery of isocyanate monomers from isocy...  
WO/1988/005430A1
A process for preparing diisocyanate compounds by the following two-step reaction without using phosgene. In the first step, a diamine and dimethyl carbonate are reacted with each other in the presence of an alkali catalyst to synthesize...  
WO/1987/005600A1
A process for preparing methyl isocyanate by heating phenyl N-methylcarbamate in a decomposition zone to produce a vapor stream containing phenol and methyl isocyanate, and thereafter rapidly separating the methyl isocyanate from the phe...  
JP5841676B2  
JP5840801B2  
JPWO2013151139A1
溶存酸素濃度が飽和溶存酸素濃度である時間 が1時間以内であるの反応系内において、L −リジンおよび/またはその塩を、リジン脱 炭酸酵素および/または変異型リジン脱...  
JP5827469B2  
JP5827248B2  
JP5823982B2  
JP5819478B2  
JP5815517B2  
JP2015532310A
本発明は、a)液体のアミン含有出発物質流 (1)及び液体のホスゲン含有出発物質流( 2)を混合することで供給流を生成する工程 と、b)滞留反応器(R)において、工...  
JP2015530395A
本発明は、対応するジアミンをホスゲンと不 活性溶媒中で反応させることによって、有機 ジイソシアネートを生成する方法に関する。 1,5−ナフタレンジアミン、テトラリ...  

Matches 301 - 350 out of 1,719