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| Number | Title | Issue Date |
| 7709680 | 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 b... | 05/04/2010 |
| 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 |
| 7297752 | Method for catalytic dimerization of isocyanates The invention concerns a method for preparing polyisocyanates by cyclodimerization of isocyanate functions borne by initial monomer isocyanates. The invention is characterised in that it comprises steps which consist in: a) providing a reaction medium comprising ini... | 11/20/2007 |
| 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 |
| 7138441 | Bioabsorbable blends and surgical articles therefrom Blends made of bioabsorbable materials including glycolide, lactide, caprolactone, dioxanone, trimethylene carbonate, alkylene glycols, esteramides, etc., and polymers and copolymers thereof with cyanoacrylates are described. Processes for making the polymers and su... | 11/21/2006 |
| 7132495 | Polyisocyanate compound, method for producing the same, and uses thereof The invention provides an optical material being excellent in balance between the heat resistance, Abbe number and refractive index by providing a compound represented by the general formula (1): ... | 11/07/2006 |
| 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 |
| 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 |
| 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 |
| 6903158 | Coating compositions comprising a polyisocyanate compound, a hydroxyl-functional film forming polymer, and a non volatile branched monoalcohol The current invention relates to a coating composition comprising a polyisocyanate compound, a hydroxyl-functional film-forming polymer, and a non-volatile branched monoalcohol. An aliphatic branched monoalcohol is preferred. More preferred are long chain non-volati... | 06/07/2005 |
| 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 |
| 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 |
| 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 |
| 6489429 | Amidoalcohol-blocked polyisocyanate There is disclosed a resin composition for electrodeposition paint comprising (A) a resin containing hydroxyl group, and (B) a polyisocyanate compound blocked with an amidoalcohol having at least one amide bond and at least one alcoholic hydroxyl group in the ... | 12/03/2002 |
| 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 |
| 6452003 | Process for preparing low-odor and storage-stable monomer-containing polyisocyanurates from isophorone diisocyanate The present invention provides a process, which includes: partially trimerizing isophorone diisocyanate in the presence of a catalyst having the formula: [R--NX3 ].sym. Y.crclbar. wherein R and X are butyl groups and Y- i... | 09/17/2002 |
| 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 |
| 6262296 | Polyisocyanate prepolymer A polyisocyanate prepolymer with isocyanate group on terminal obtainable by reaction of (A) polyoxyalkylenepolyol, (B) polyhydric alcohol having a molecular weight of 90 to 250 and the number of hydroxyl group of 2 to 3 with branched alkyl group and/or cy... | 07/17/2001 |
| 6242530 | Stabilized blocked isocyanates and their use in polyurethane stoving lacquers The present invention relates to (cyclo)aliphatic polyisocyanates which have a content of blocked and unblocked isocyanate groups (calculated a NCO) of 5 to 25 wt. %, in which at least 95% of the isocyanate groups are present in a form blocked with blocki... | 06/05/2001 |
| 6180745 | Moisture-curable compositions containing isocyanate and succinyl urea groups The present invention relates to moisture-curable compositions which have a) a content of (cyclo)aliphatically-bound isocyanate groups (calculated as NCO, MW 42) of 0.2 to 22% by weight and b) a content of succinyl urea groups (calculated as --NH--CO--N--, MW 57) ... | 01/30/2001 |
| 6177535 | Preparing radiation-curable, urethane-functional prepolymers A process for preparing radiation-curable, urethane-functional prepolymers by reacting an isocyanate-functional component A with an OH-containing component B, wherein either component A embraces two different isocyanate compounds A1 or one isocyanate comp... | 01/23/2001 |
| 6111053 | Olefinically unsaturated polyisocyanates The invention relates to olefinically unsaturated polyisocyanates containing allophanate groups and having an NCO content of 6 to 20% by weight, an iodine value of 15 to 150, a content of hydrocarbon chains containing 12 to 30 carbon atoms of 100 to 700 m... | 08/29/2000 |
| 6051674 | Polymeric vehicles which include a phenol blocked isocyanate having aliphatic hydroxyl fucntionality The present invention is directed to a polymeric vehicle, the formulated coating composition and a coating binder made from the polymeric vehicle and a method for making the polymeric vehicle where the polymeric vehicle includes a phenol blocked isocyanat... | 04/18/2000 |
| 5961878 | Amine-blocked polyisocyanates and their use in one-component stoving compositions The invention relates to non-crystallising, amine-blocked polyisocyanates, to the preparation thereof and to their in one-component polyurethane stoving compositions, in particular for coil-coating applications.... | 10/05/1999 |
| 5951911 | Low viscosity ethylenically unsaturated polyurethanes containing allophanate groups The present invention relates to ethylenically unsaturated polyurethanes which are substantially free from isocyanate groups and have a) a content of ଲ,γ-ethylenically unsaturated ether groups (calculated as C.dbd.C, MW 24) incorporated through allophan... | 09/14/1999 |
| 5905151 | Trimer catalyst for aliphatic and aromatic isocyanates This invention relates to a process for trimerizing organic polyisocyanates in the presence of thermally active catalyst systems. The catalyst systems comprise (a) compounds selected from the group consisting of 1) lithium salts of aliphatic or aromatic c... | 05/18/1999 |
| 5880312 | Semicarbazide derivative and a coating composition containing the same Disclosed is a semicarbazide derivative represented by formula (1) or a terminal-blocked form thereof: ##STR1## wherein R1 represents a terminal isocyanate group-free polyisocyanate residue or a terminal isocyanate group-free triisocyanate... | 03/09/1999 |
| 5849855 | Blocked polyisocyanate composition and one-pack thermocuring resin composition comprising the same Disclosed is a blocked polyisocyanate composition comprising: a blocked polyisocyanate obtained by blocking the terminal isocyanate groups of a two or more terminal isocyanate groups-containing polyisocyanate derived from at least one diisocyanate selecte... | 12/15/1998 |
| 5821316 | Polyurethane prepolymers for making elastomers having improved dynamic properties An isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyisocyanate and a polyol composition consisting essentially of a polyether polyol of 350-2000 equivalent weight and a low molecular weight polyol of 62 to | 10/13/1998 |
| 5798409 | Reactive two-part polyurethane compositions and optionally self-healable and scratch-resistant coatings prepared therefrom The present invention relates to two-part reactive polyurethane compositons and the cured coatings prepared therefrom. The invention also relates to particular compositions and cured coatings therefrom that exhibit high damping character, excellent scratc... | 08/25/1998 |
| 5739207 | Hexamethylene diisocyanate residue-based compositions as fillers for polyisocyanates Urethane-filled polyisocyanates are produced by (a) reacting a hexamethylene diisocyanate-containing residue having less than 10% by weight monomeric hexamethylene diisocyanate and a total NCO content of at least 25% with an alcohol containing at least on... | 04/14/1998 |
| 5725612 | Additives for minimizing intake valve deposits, and their use New, highly effective detergent/dispersants for use in spark ignition fuels are described. They are Mannich condensation products formed from (i) one mole part of at least one substituted hydroxyaromatic compound having on the ring both (a) an aliphatic h... | 03/10/1998 |
| 5714564 | Low viscosity polyisocyanates prepared from monomeric triisocyanates The present invention is directed to a polyisocyanate containing a) polyisocyanates containing isocyanurate groups and corresponding to formula 1 ##STR1## wherein R represents the residue obtained by removing one of the isocyanate groups from 4-isocy... | 02/03/1998 |
| 5710319 | Process for the preparation of substituted quinazoline-2,4-diones The invention relates to a process for the preparation of quinazoline-2,4-diones of the formula (I) ##STR1## in which R1 is (C1 -C12)alkyl, (C3 -C8)cycloalkyl or (C7 -C10)ar... | 01/20/1998 |
| 5710191 | Hydroxymethyl quinuclidine catalyst compositions for making polyurethane foams A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a cell stabilizer and a catalyst composition comprising at least one compound of either of the following formula... | 01/20/1998 |
