| Entries |
| Document | Title | Date |
|---|
| 20080262262 | Preparation of polyisocyanates containing uretdione groups using phosphine catalysts - The invention provides a process for isocyanate dimerization (uretdione formation) and a process for preparing polyisocyanates having a high content of uretdione groups, using specific phosphines as catalysts. The phosphines have one or two tertiary alkyl radicals bound directly to phosphorus. | 10-23-2008 |
| 20100022797 | PROCESS FOR PREPARING RADIATION-CURABLE PREPOLYMERS CONTAINING URETHANE GROUPS - The invention relates to a continuous process for preparing radiation-curable prepolymers containing urethane groups, more particularly urethane acrylates. | 01-28-2010 |
| 20100274046 | METHOD FOR PRODUCING ISOCYANATES - The present invention relates to a multiple-stage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, more preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic poly-amines with ureas to form low-molecular monomeric polyureas, and the thermal decomposition thereof. | 10-28-2010 |
| 20110224456 | PROCESS FOR THE SIMULTANEOUS PRODUCTION OF DIFFERENT MIXTURES OF DIISOCYANATE ISOMERS OF THE DIPHENYLMETHANE SERIES - Process for the simultaneous and continuous production of two different mixtures of predominantly 4,4′-MDI and 2,4′-MDI in a single-step suspension melt crystallisation process whereby a mixed diisocyanate feed stream [MIx] is used to produce simultaneously two mixed diisocyanate streams [MIy and MIz] wherein x=80 to 92, y=97 to 99 and z=60 to 80 preferably x=82 to 88, y=97.2 to 98.5 and z=63 to 70 where x, y and z are percentages by weight of the 4,4′-MDI isomer contained in the diisocyanate isomer mixture. | 09-15-2011 |
| 20110251423 | METHOD FOR PRODUCING COLOURLESS POLYISOCYANATES - The present invention relates to a process for preparing colorless polyisocyanates, in particular for reducing the color of polyisocyanates. | 10-13-2011 |
| 20110251424 | LOW MONOMER 1 : 1 MONOADDUCTS OF REACTIVE OLEFINIC COMPOUNDS AND DIISOCYANATES USING INSERTABLE INHIBITORS - The invention relates to low monomer 1:1 monoadducts of reactive olefinic compounds and diisocyanates, to the production and to the use thereof. | 10-13-2011 |
| 20120004445 | PROCESS FOR PREPARING ISOCYANATES - The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene, optionally in the presence of an inert medium, in which phosgene and amine are first mixed and converted to the isocyanate in a reactor, and in which a reaction gas which comprises isocyanate and hydrogen chloride leaving the reactor is cooled in a quench by adding a liquid quench medium to form a mixture of reaction gas and quench medium as the product stream. The walls of the quench are essentially completely wetted with a liquid. | 01-05-2012 |
| 20130158291 | PROCESS FOR PREPARING POLYURETHANE PREPOLYMERS CONTAINING ISOCYANATE GROUPS - The present invention relates to the technical field of isocyanates. The present invention provides a method for preparing NCO prepolymers by reacting a stoichiometric excess of an organic isocyanate with an isocyanate-reactive component, the reaction components being mixed together and the mixture being introduced directly into a storage or transport vessel, where it reacts to completion. | 06-20-2013 |
| 20150018575 | HIGHLY SEGREGATED JET MIXER FOR PHOSGENATION OF AMINES - Embodiments of the present invention provide a mixing conduit ( | 01-15-2015 |
| 20150025268 | PROCESS FOR THE PREPARATION OF POLYISOCYANATES AND USE THEREOF - The invention relates to a process for isocyanate modification which includes reacting a) at least one organic isocyanate having an NCO functionality greater than or equal to 1, b) a catalyst comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation, c) optionally a solvent, and d) optionally additives. The present invention also relates to a catalyst for isocyanate modification comprising at least one phosphonium salt comprising at least one cycloalkyl substituent bonded directly to a P atom of a phosphonium cation. | 01-22-2015 |
