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| Number | Title | Issue Date |
| 7994361 | Moderate-pressure gas phase phosgenation The invention relates to a process for preparing aromatic diisocyanates by reaction of phosgene with diamines in the gas phase, in which the reaction is carried out in a reaction zone at moderate pressures, i.e. the pressure in this reaction zone is more than 3 bar ... | 08/09/2011 |
| 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 |
| 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 |
| 7307186 | Multistage continuous preparation of cycloaliphatic diisocyanates A process for continuous phosgene-free preparation of cycloaliphatic diisocyanates. ... | 12/11/2007 |
| 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 |
| 7268202 | Polyisocyanate composition having allophanate group and high-solid coating material A polyisocyanate composition comprising an allophanate group, which is obtained from an aliphatic diisocyanate(s), wherein in a state substantially free of a solvent and the aliphatic diisocyanate(s), (i) the content of components ... | 09/11/2007 |
| 7186857 | Process for the preparation of di- and polyamines of the diphenylmethane series The present invention relates to a process for the preparation of di- and polyamines of the diphenylmethane series, and to the preparation of di- and poly-isocyanates of the diphenylmethane series from these di- and poly-amines. The di- and poly-amines of the diphen... | 03/06/2007 |
| 7148374 | Elimination-free powder coating crosslinking agents The present invention relates to novel blocked, elimination-free polyurethane (PUR) crosslinking agents, to a process for their preparation and to their use as starting components for the production of polyurethane plastics, especially as crosslinking agents for the... | 12/12/2006 |
| 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 |
| 7119131 | Urethane binder compositions for foundry applications Foundry cores and molds for casting metals are prepared by forming a binder comprising a polyol, an isocyanato urethane polymer and a urethane catalyst. The binder additives and resin formulations of the invention are especially useful for casting non-ferrous metals... | 10/10/2006 |
| 7098257 | Coating materials that can be cured thermally and by actinic radiation, and the use thereof Coating materials curable thermally and with actinic radiation, comprising (A) binder selected from the group consisting of random, alternating and block, linear, branched and comb polyaddition resins, polycondensation resins, and ... | 08/29/2006 |
| 7057003 | Reactive systems, their preparation and their use The invention relates to novel blocked polyurethane prepolymers, to a process for their preparation, to reactive systems prepared therefrom that cure at room temperature, and to their use. ... | 06/06/2006 |
| 7045650 | Polyurethane elastomers having improved physical properties and a process for the production thereof A polyol composition having a number average molecular weight of from about 1,000 to about 3,000 Daltons is made up of (1) at least 60% by weight of a low monol polyoxypropylene polyol having a number average molecular weight of from about 2,000 to 12,000 Da and a d... | 05/16/2006 |
| 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 |
| 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 |
| 6913629 | Building blocks containing isocyanate groups and their use for functionalizing or modifying compounds or surfaces Compounds of the formula 1 OCN—R1—NHCOX—R2—(Y)n (1), where X is a covalent bond to R2 or is O, S or NR3, Y is a hydrogen atom or a free functional group and n is an integer from ... | 07/05/2005 |
| 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 |
| 6838578 | Process for preparing (cyclo)aliphatic isocyanates The present invention relates to a process for preparing (cyclo)aliphatic diisocyanates and triisocyanates corresponding to the formula R—(NCO)n (I), wherein R represents a (cyclo)aliphatic hydrocarbon group having ... | 01/04/2005 |
| 6830705 | Liquid stable MDI prepolymers and liquid stable curative systems suitable for room temperature casting which yield high performance urethane elastomers The invention relates to liquid stable MDI prepolymers and curative systems which are suitable for room temperature casting and which yield high performance low-shrinkage urethane elastomers upon room-temperature curing, the prepolymer and curative components, the e... | 12/14/2004 |
| 6777524 | Polyether polyurethane Disclosed is a polyether polyurethane comprising (A) at least one polyisocyanate having two or more isocyanate groups, which is selected from the group consisting of an aromatic polyisocyanate and an aliphatic polyisocyanate; (B) a polyoxytetramethylene glycol (PTMG... | 08/17/2004 |
| 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 |
| 6740726 | Polyisocyanates as coating components for coating means rich in solids A description is given of polyisocyanates of the formula I in which R and R′ are identical or different and are alkyl groups having 1-4 carbon atoms and n is on average from 1.5 to 5 and also of a ... | 05/25/2004 |
| 6673960 | Work-up of distillation residues from the synthesis of toluene diisocyanate A process for working up distillation residues from the synthesis of tolylene diisocyanate by reaction of the distillation residues with water comprises reacting the TDI distillation residues with water in a continuous or semicontinuous process in a backm... | 01/06/2004 |
| 6664414 | Process for reducing residual isocyanate The invention provides a process for reducing the amount of monomeric polyisocyanate in a composition comprising a polymer or oligomer bearing isocyanate groups, the method comprising reacting the composition with a quenching agent, the quenching agent co... | 12/16/2003 |
| 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 |
| 6583314 | Stable isocyanate formulations The pot life of an isocyanate formulation is controlled by including a chain extender having (a) at least two secondary amine groups, (b) no primary amine groups, and (c) a reactivity low enough that the chain extender will not react sufficiently with iso... | 06/24/2003 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6495652 | Prepolymers containing isocyanate groups and a method for the production thereof Prepolymers which contain isocyanate groups, have an NCO content of at least 30.0% by weight and can be prepared by reacting an isocyanate mixture consisting predominantly of diphenylmethane diisocyanates and polyphenylpolymethylene polyisocyanates and ha... | 12/17/2002 |
| 6455729 | Polyisocyanate compounds, process for producing the same, and optical materials using the same The invention provides a novel polyisocyanate compound which is useful as a starting material for an optical material having a high refractive index, a low dispersion and excellent optical characteristics, and a process for producing this compound at good... | 09/24/2002 |
| 6444777 | PROCESS FOR PRODUCING COMPACT OR CELLULAR POLYURETHANE ELASTOMERS BASED ON 3,3' DIMETHYL DIPHENYL 4,4' DIISOCYANATE-CONTAINING POLYISOCYANATE MIXTURES AND ISOCYANATE PREPOLYMERS SUITABLE THEREFOR Compact and preferably cellular polyurethane elastomers based on polyisocyanate mixtures containing 3,3'-dimethylbiphenyl 4,4'-diisocyanate are produced by reacting a) relatively high molecular weight polyhydroxyl compounds and, if desired, b) low molecular we... | 09/03/2002 |
| 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 |
| 6420508 | Light-fast polyisocyanates having good solubility in non-polar solvents The present invention relates to polyisocyanate mixtures prepared from aliphatic and/or cycloaliphatic diisocyanates and having a) an average isocyanate functionality of at least 2.0, b) a content of isocyanate groups (calculated as NCO; molecular weight=42) o... | 07/16/2002 |
| 6417313 | Low monomer content NCO prepolymers based on 1,4-diisocyanato-2,2,6-trimethylcyclohexane, a process for their preparation, and use Low-monomer, NCO-containing prepolymers based on 1,4-diisocyanato-2,2,6-trimethylcyclohexane, a process for their preparation, and their use.... | 07/09/2002 |
| 6395925 | Process for purifying organic isocyanates, the organic isocyanates so purified and their use The invention provides a new process for purifying organic isocyanates or isocyanate mixtures by mixing the isocyanates or isocyanate mixtures to be purified with at least one alcohol and/or thiol or a mixture of alcohols and/or thiols, heating the result... | 05/28/2002 |
