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Patent Searching and Data


Matches 301 - 350 out of 1,628

Document Document Title
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/1994/008953A1
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/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/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...  
JP5586624B2  
JP5583879B1  
JP2014520086A  
JP5574691B2  
JP5574684B2  
JP5576390B2  
JP5574603B2  
JP5566149B2  
JP5567477B2  
JP5563886B2  
JP5563887B2  
JP5563816B2  
JP5557841B2  
JP5548684B2  
JP5543474B2  
JP5518056B2  
JP5519942B2  
JP5518605B2  
JP5502286B2  
JP5499022B2  
JP5499023B2  
JP5487303B2  
JP5479675B2  
JP2014509247A  
JP2014062071A
To provide a production method capable of obtaining an ethylenically unsaturated group-containing isocyanate compound with high yield, which is excellent in safety to human bodies or environments without using phosgene and in which the p...  
JP2014508100A  
JP5460321B2  
JP5460327B2  
JP5449082B2  
JP5443487B2  
JP5441460B2  
JP5433213B2  
JP5424895B2  
JP2014504274A  
JP5419327B2  
JP5416830B2  
JP5414522B2  
JP5416387B2  
JP5404627B2  

Matches 301 - 350 out of 1,628