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| Number | Title | Issue Date |
| 8158817 | Synthesis of acylureas and composition comprising acylureas The invention relates to a process for the synthesis of a polyisocyanate composition comprising acylureas. According to the invention, a starting composition comprising a compound having at least two isocyanate functional groups is subjected to a reaction with at le... | 04/17/2012 |
| 7795467 | Bioabsorbable, biobeneficial polyurethanes for use in medical devices Bioabsorbable, polyurethane-based stent coatings that comprise non-fouling coatings with polyethylene glycol and hyaluronic acid are disclosed. In addition to these coatings, medical devices comprising these coatings and methods of applying the coatings are disclose... | 09/14/2010 |
| 7420080 | Multistage continuous preparation of cycloaliphatic diisocyanates The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates. ... | 09/02/2008 |
| 7414145 | Method of enantioselective nucleophilic addition reaction of enamide to carbonyl group and synthesis method of optically active α-hydroxy-γ-keto acid ester and hydroxydiketone A method of an enantioselective nucleophilic addition reaction to carbonyl, which enables an asymmetric synthesis of an optically active α-hydroxy-γ-keto acid ester, an optically active α-hydroxy-γ-amino acid ester, hydroxydiketone compounds, etc. being useful a... | 08/19/2008 |
| 7370565 | Apparatus for mixing explosive materials and for filling of ordnance Described herein is apparatus for the mixing of explosive materials utilising a static mixer (26) for combining pre-mix explosive material and hardener prior to introducing the combined mixture into any ordnance (38). ... | 05/13/2008 |
| 7371891 | Multistage continuous preparation of cycloaliphatic diisocyanates The invention relates to a multistage process for continuous and phosgene-free preparation of cycloaliphatic diisocyanates. ... | 05/13/2008 |
| 7368595 | Process for the production of light-colored isocyanates The invention relates to an improved process for the production of isocyanates by the reaction of an amine or a mixture of two or more amines with phosgene, the improvement involving the phosgene containing less than about 100 ppm of sulfur in elemental or bound for... | 05/06/2008 |
| 7361782 | Process for preparing fluorochemical monoisocyanates A process for preparing fluorochemical monoisocyanates comprises reacting at least one fluorochemical alcohol represented by the formula CnF2n+1SO2NCH3(CH2)mOH, wherein n=2 to 5, and m=2 to 4, with 4,... | 04/22/2008 |
| 7339020 | High-functionality polyisocyanates High-functionality polyisocyanates are prepared by a process which comprises (i) preparation of an addition product (A) which contains one group which is reactive toward isocyanate and at least two isocyanate groups by reacting | 03/04/2008 |
| 7329717 | Polyisocyanate-modified polycarboxylic acids A process for preparing polyisocyanate-modified polycarboxylic acids by conversion of anhydride-group-free polycarboxylic acids with isocyanate-functional compounds. The process includes reacting A) an anhydride-group-free polycarboxylic-acid component with B) an is... | 02/12/2008 |
| 7326705 | Heterocyclic sodium/proton exchange inhibitors and method Heterocyclic are provided which are sodium/proton exchange (NHE) inhibitors which have the structure wherein n is 1 to 5; X is N or C—R5 wherein R5 is H, halo, alkenyl, alkynyl, alkoxy, al... | 02/05/2008 |
| 7323532 | Low-viscosity radiation-curing and thermally curing polyisocyanates The present invention concerns a process for producing low-viscosity polyisocyanates or secondary products thereof, which carry activated, radiation-curable double bonds and can optionally also cure thermally, and low-viscosity polyisocyanate mixtures or secondary p... | 01/29/2008 |
| 7288213 | Method for preparing low viscosity tricondensate polyfunctional isocyanates A method is described for preparing a tricondensate polyfunctional isocyanate composition, preferably having at least an isocyanurate and/or biuret group, which includes adding to a tricondensate polyfunctional isocyanate, or a mixture of different tricondensate pol... | 10/30/2007 |
| 7179935 | Method for producing isocyanates A process for the preparation of isocyanates from carbamic esters. ... | 02/20/2007 |
| 7129312 | Adhesion promoters for monomer-free reactive polyurethanes Polyurethane compositions are produced in a two-stage method. In a first step, a diol component with a molecular weight of less than 2000 is reacted with a monomeric diisocyanate with a molecular weight of less than 500 and the unreacted monomeric diisocyanate is re... | 10/31/2006 |
| 7081545 | Process for preparing fluorochemical monoisocyanates A process for preparing fluorochemical monoisocyanates comprises reacting at least one fluorochemical alcohol represented by the formula CnF2n+1SO2NCH3(CH2)mOH, wherein n=2 to 5, and m=2 to 4, with 4,... | 07/25/2006 |
| 7071353 | Polyisocyanates containing acylurea groups, a process for their production and their use The present invention relates to a process for preparing polyisocyanates containing acylurea groups by reacting isocyanates corresponding to formula (I) R—(NCO)n,  (I) wherein R represent... | 07/04/2006 |
| 7038003 | Polyether allophanates stable towards discolouration A process for preparing polyisocyanate prepolymers containing allophanate structural units that includes reacting a) one or more polyisocyanates with b) one or more polyetherpolyols containing less than or equal to... | 05/02/2006 |
| 7030266 | Method for producing polyisocyanates The invention relates to a method for making oligomeric isocyanates by reacting diisocyanates in the presence of a catalyst, wherein the catalyst comprises a saline compound prepared from a five-membered N-heterocycles and the N-heterocycle comprises at least one Nâ... | 04/18/2006 |
| 7022874 | Preparation of biuret-containing polyisocyanates A process for the preparation of polyisocyanates which contain one or more biuret groups, by reacting a) an aliphatic or cycloaliphatic isocyanate containing two or more isocyanate groups (isocyanate a) with b) a tertiary alcohol or a mixtu... | 04/04/2006 |
| 7019164 | Process for the production of (poly)isocyanates in the gas phase The present invention relates to a process for the production of an isocyanate corresponding to the formula R(NCO)n wherein R represents a (cyclo)aliphatic or aromatic hydrocarbon residue having up to 15 carbon atoms, preferably 4 to 13 carbo... | 03/28/2006 |
| 6991746 | Polymeric allophanates of diphenylmethane diisocyanate, perpolymers of these polymeric allophanates, and processes for the preparation of the polymeric allophanates and the prepolymers thereof The present invention relates to a new high functionality MDI. In particular, this invention relates to polymeric allophanates based on diphenylmethane diisocyanate having an NCO group content of 12 to 30%, prepolymers thereof, and processes for the production of th... | 01/31/2006 |
| 6974880 | Process for the manufacture of (poly-)isocyanates in the gas phase The present invention relates to a process for the manufacture of diisocyanates by phosgenation of the corresponding diamines in which the vaporous diamines, optionally rarefied with an inert gas or with the vapors of an inert solvent, and phosgene are heated separa... | 12/13/2005 |
| 6916953 | Integrated process for preparing isocyanates Process for preparing organic isocyanates, which comprises the steps (a) making available a first partial amount of chlorine, with the chlorine of this first partial amount having a content of free and bound bromine and iodine of | 07/12/2005 |
| 6887399 | Polymeric allophanates of diphenylmethane diisocyanate, prepolymers of these polymeric allophanates, and processes for the preparation of the polymeric allophanates and the prepolymers thereof The present invention relates to a new high functionality MDI. In particular, this invention relates to polymeric allophanates based on diphenylmethane diisocyanate having an NCO group content of 12 to 30%, prepolymers thereof, and processes for the production of th... | 05/03/2005 |
| 6867324 | Method and device for the continuous production of organic mono or polyisocyanates Starting material streams are mixed in a mixer (13) for the phosgenation of amines by a process in which the reaction product (3) is removed in a closed loop and the starting material streams (1.2) contain organic solvents. The main streams (... | 03/15/2005 |
| 6852823 | Polyurethane and polyurethane-urea elastomers from polytrimethylene ether glycol Polyurethanes or polyurethane-ureas prepared from: (a) polytrimethylene ether glycol having a number average molecular weight in the range of about 1,000 to about 4,000 and unsaturated end groups in the range of about 0.003 to about 0.015 meq/g; (b) diisocyanate; an... | 02/08/2005 |
| 6750367 | Tetralin isocyanates The present invention relates to novel aromatic isocyanates obtained by partially hydrogenating naphthalene as well as the processes for preparing the same, and to their use as an isocyanate component in the production of polyurethanes. ... | 06/15/2004 |
| 6743374 | Self-emulsifiable polyisocyanate with high functionality and process for producing the same A self-emulsifiable polyisocyanate with high functionality, having the average number of functional groups in 4.3 or more and a viscosity of 8,000 mPa·s (at 25° C.) or less, which is obtained by subjecting a modified polyisocyanate containing allophanate bonds and... | 06/01/2004 |
| 6710151 | Terminal-blocked isocyanate prepolymer having oxadiazine ring, process for producing the same, and composition for surface-coating material The end-blocked isocyanate prepolymer having an oxadiazine ring according to the present invention is characterized in that at least one of isocyanate groups of a NCO-terminated isocyanate prepolymer, which has NCO groups at the ends and comprises units derived from... | 03/23/2004 |
| 6639102 | Process for producing polyisocyanates of the diphenyl methane series having a reduced color value Polyisocyanates of the diphenyl methane series having reduced color values are obtained by a) reacting aniline and formaldehyde in the presence of an acid catalyst to form a polyamine, b) neutralizing the reaction mixture containing polyamine with a base,... | 10/28/2003 |
| 6590098 | Method of preparing aliphatic polyisocyanates with uretdione, isocyanurate and iminooxadiazindione structures The invention relates to a method of preparing an aliphatic polyisocyanate by conversion of an aliphatic diisocyanate to a polyisocyanates in the presence of a catalyst, wherein the catalyst contains a saline compound having 5 to 97.1 wt. % of a 1,2,3- an... | 07/08/2003 |
| 6569352 | Phthalic anhydride based polyester-ether polyols and urethane prepolymers produced therefrom Disclosed are polyester-ether polyols and their use in urethane prepolymers, urethane foams and non-foam urethane coatings, adhesives, sealants and/or elastomers. Methods for producing such polyester-ether polyols are disclosed, along with methods for pro... | 05/27/2003 |
| 6559264 | Malonic acid ester/triazole mixed blocked HDI trimer/formaldehyde stabilization The present invention relates to blocked polyisocyanate crosslinking agents, to the production thereof and to the use thereof in single-component stoving lacquers, particularly OEM clear lacquers (original equipment material, initial lacquer coating).... | 05/06/2003 |
| 6541532 | Scorch inhibiting compositions for polyurethane foams New, useful and surprisingly effective antiscorch compositions for utilization within polyurethane foam production methods which utilize very popular tertiary amine catalysts are provided. Such compositions require the presence of nominal yet effective am... | 04/01/2003 |
| 6515164 | Low monomer polyurethane prepolymer and process therefore A low-monomer PU prepolymer containing free NCO groups which is obtained from polyhydric alcohols and diisocyanates differing in their reactivity and which is distinguished by the ratio of the NCO groups of the partly slower-reacting diisocyanate to the N... | 02/04/2003 |
| 6515125 | Liquid partially trimerized polyisocyanates based on toluene diisocyanate and diphenylmethane diisocyanate This invention relates to storage-stable, liquid, partially trimerized polyisocyanates having an NCO group content of 24 to 40% by weight, and comprising 20 to 88% by weight of toluene diisocyanate and 12 to 80% by weight of a polyisocyanate of the diphen... | 02/04/2003 |
| 6509433 | Fluorine-containing blocked isocyanates The present invention relates to blocked fluorine-containing polyisocyanates which have a fluorine content, calculated as F=19, of 1.0 to 20.0 wt. %, preferably 4.0 to 10.0 wt. %, and are suitable for preparing stoving coatings having a water- and soil-re... | 01/21/2003 |
| 6489503 | Storage stable methylene bis(phenylisocyanate) compositions The present invention provides a liquid methylene bis(phenylisocyanate) composition including a high concentration of methylene bis(phenylisocyanate) which has an improved storage stability. The invention further provides a method of making the liquid met... | 12/03/2002 |
| 6426414 | Polyether-modified polyisocyanate mixtures having improved dispersibility in water The present invention relates to water dispersible polyisocyanate mixtures prepared from aliphatic, cycloaliphatic, araliphatic and/or aromatic diisocyanates and having a) an average isocyanate functionality of at least 2.0, b) a content of 5.0 to 25.0 wt. %, ... | 07/30/2002 |
