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7378543 Stable liquid biuret modified and biuret allophanate modified toluene diisocyanates, prepolymers thereof, and processes for their preparation  
This invention relates to stable liquid biuret modified toluene diisocyanates, prepolymers thereof, stable liquid biuret allophanate modified toluene diisocyanates, prepolymers thereof, and to...
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...
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...
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...
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...
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...
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...
6720400 Process for the preparation of polyisocyanates with a biuret structure  
The present invention relates to an improved process for the continuous preparation of polyisocyanates with a biuret structure comprising the steps of continuously reacting excess amounts of...
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...
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...
6486346 Process for the preparation of durene diisocyanate  
Durene diisocyanate is prepared by reacting durene with nitric acid in sulfuric acid, catalytic hydrogenation of the dinitrodurene that is formed, and phosgenation of the resultant durene diamine...
6414184 Process for producing polyisocyanates containing biuret groups from (cyclo)aliphatic diisocyanates  
A process for preparing biuret-functional polyisocyanates from at least one aliphatic or cycloaliphatic diisocyanate and from at least one amine or water or a mixture thereof as reactants involves...
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...
6066759 Process and device for preparing (cyclo)aliphatic biuret groups-containing polyisocyanates  
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...
5994491 Process for the production of polyisocyanates having a biuret structure  
A process for the production of polyisocyanates having a biuret structure, comprising continuously combining organic diisocyanates having aromatically attached isocyanate groups in a mixing chamber...
5973072 Polymeric vehicles which include a phenolic urethane reactive diluent  
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...
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...
5641851 Preparation of biuret-containing polyisocyanates  
The invention is to a process for the preparation of biuret-containing polyisocyanates by catalytic reaction of aliphatic and/or cycloaliphatic diisocyanates with a biuretizing agent, where the...
5580645 Substrates treated with polyfluoro nitrogen-containing organic compounds  
A substrate having oil-, water- and soil-repellency and/or soil release properties is produced by treating the substrate with a polyfluoro organic compound having at least 1 urea linkage derived...
5552507 Diisocyanates and processes for their production and use  
Diisocyanates containing carboxylic acid ester groups corresponding to the formula: ##STR1## in which R and R 1 represent specified groups are produced by phosgenation of the corresponding...
5508372 Isocyanate prepolymers, a process for their production and their use in one-component coating compositions  
The present invention relates to a process for the production of storage stable prepolymers containing free isocyanate groups by reacting a) an organic polyisocyanate component having...
5233010 Process for preparing isocyanate and carbamate ester products  
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 --NH 2 groups, recovering the...
5106874 Process for preparing elastomeric polyurethane or polyurethane-urea polymers, and polyurethanes so prepared  
A process is disclosed for preparing a polyurethane or polyurea elastomer by reacting in a closed mold a reaction mixture comprising a polyisocyanate and a relatively high equivalent weight...
5103045 Storage-stable biuret polyisocyanates  
Storage-stable biuret polyisocyanates useful, e.g., for the production of paints and adhesives, are prepared by reacting at least one aliphatic, alicyclic or arylaliphatic diisocyanate with a...
4983762 Preparation of biureto polyisocyanates  
Clear, precipitate-free, storage-stable biureto polyisocyanates, well adopted for paint applications, are prepared by reacting at least one aliphatic, alicyclic or arylaliphatic monomeric...
4855490 Liquid polyisocyanate adduct mixtures possessing good compatibility with apolar solvents  
The present invention relates to a polyisocyanate adduct mixture which at a 100% solids concentration has an isocyanate content of about 4 to 19 weight percent and is liquid at room temperature....
4837359 Process for the production of polyisocyanates with biuret structures  
Polyisocyanates with biuret structures are produced at temperatures above 250° C. More specifically, an excess of a diisocyanate having aliphatically and/or cycloaliphatically bound isocyanate...
4816600 Isocyanate compositions obtained from reaction of isocyanates with blocked polamines  
Modified organic isocyanate composition containing urea and/or biuret groups and/or salts of these groups, obtained from the reaction of a blocked polyamine composition and an unblocked isocyanate...
4625052 Process for the production of polyisocyanates which have a biuret structure  
The present invention is directed to a process for the production of polyisocyanates which have a biuret structure by reacting aliphatic diisocyanates with water at elevated temperature,...
4619999 Aliphatic isocyanate compounds  
An aliphatic isocyanate compound containing at least one N-methylene isocyanate group of the formula: ##STR1## formed as a reaction product of isocyanic acid and a compound containing at least one...
4618706 Process for the preparation of aromatic polyisocyanates containing urea and/or biuret groups  
This invention relates to a process for the preparation of aromatic polyisocyanates containing urea and/or biuret groups, optionally in the form of a mixture of homologues and/or isomers, by the...
4613686 Process for the preparation of polyisocyanates with biuret structure  
The present invention relates to a process for the preparation of polyisocyanates which have a biuret structure of reacting excess quantities of aliphatic diisocyanates with biuretizing agents at...
4419293 Aliphatic solvent compatible isocyanates  
The present invention relates to a modified polyisocyanate having improved compatibility with aliphatic hydrocarbon solvents comprising the reaction product of (a) an aliphatic biuret isocyanate...
4373080 Polyisocyanates, preparation and use thereof  
The present invention relates to a process for the production of specific polyisocyanates by reacting diamines containing hydrogen atoms which are active in the context of the isocyanate addition...
4340712 Process for the preparation of polyisocyanates containing biuret and/or higher polyuret groups and use thereof as synthesis component in the preparation of polyurethane plastics  
A process for the preparation of polyisocyanates containing biuret and/or higher polyuret groups by reacting secondary diamines with diisocyanates characterized in that the reaction is carried out...
4320068 Process for the production of polyisocyanates having a biuret structure  
This invention relates to a new process for the production of polyisocyanates having a biuret structure by reacting aliphatic or cycloaliphatic diisocyanates with sub-stoichiometric quantities of...
4292255 Process for the preparation of organic polyisocyanates containing urea groups  
The present invention relates to a process for the preparation of compounds selected from the group consisting of a polyisocyanate containing urea groups and a polyisocyanate containing biuret...
4264519 Process for the preparation of organic polyisocyanates containing biuret groups  
The present invention relates to a process for the preparation of compounds selected from the group consisting of a polyisocyanate containing urea groups and a polyisocyanate containing biuret...
4221877 Modified diphenylmethane diisocyanates useful in polyurethanes or polyisocyanurates  
Covers a water-modified diisocyanate mixture obtained from water-treating a diphenylmethane diisocyanate to provide a diisocyanate mixture comprising 3-25 percent by weight of diphenylmethane...
4220749 Process for the production of modified polyisocyanates  
This invention relates to a new process for the production of organic polyisocyanates containing polyuret groups, to polyisocyanates obtainable by this process and to the use of the products...
4218390 Method for preparing biuret-structure polyisocyanates  
A method for preparing biuret-structure polyisocyanates which comprises reacting 1,6-hexamethylenediisocyanate with water which is introduced into the reaction zone in the form of vapors in a...
4152350 Process for the preparation of polyisocyanates containing biuret groups  
This invention relates to an improved process for the preparation of polyisocyanate mixtures containing biuret groups by the reaction of organic diisocyanates with compounds which react with...
4147714 Process for the preparation of polyisocyanates which contain biuret groups  
This invention relates to an improved process for the preparation of polyisocyanates which contain biuret groups by the direct reaction of polyamines in vapor form with polyisocyanates.
4144268 Preparation of bisulphite adducts of biruet-polyisocyanates  
Bisulphite adducts of biuret-polyisocyanates are prepared by reacting an aqueous solution containing more than 200 gm/l. of sodium bisulphite with a selected alcohol and a biuret-polyisocyanate...
4088665 Process for the partial carbodiimidization of organic isocyanates  
The present invention relates to a new process for the partial carbodiimidization of the isocyanate groups of organic mono-, or di- and/or polyisocyanates, the mixtures which can be obtained by...
4072702 Tri-functional isocyanate crosslinking agents for hydroxy-terminated polybutadiene binders  
By use of the reaction for the preparation of biurets from isocyanates (i, condensation products of isocyanates and water) a variety of tri-functional isocyanates are made available as the curing...
4062833 Biuret polyisocyanates  
The biuret polyisocyanates correspond to the formula ##STR1## wherein R is --CH 2 CH 2 --O--CH 2 CH 2 -- and X is hydrogen or --C(O)--NX--R--NCO, and they have not more than six isocyanato...
4051165 Preparation of biuret polyisocyanates  
A method of preparing biuret polyisocyanates by reacting diisocyanates with up to about 0.4 mol per mol of diisocyanate of a monohydric tertiary alcohol in the presence of from about 0.001 to about...
3954825 Biuret polyisocyanates  
Biuret polyisocyanate is prepared by reacting a hindered polyamine and a polyisocyanate at elevated temperatures, in the presence of an excess of polyisocyanate. The resulting product may be...
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