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8716426 Method for preparing an allophanate, allophanate, and low-viscosity composition containing the allophanate  
A process for the preparation of an allophanate of one or more identical or different isocyanates, compositions obtained by the process, and uses of the compositions are disclosed. The process...
8445623 Process for the preparation of polyisocyanates with a biuret structure  
The present invention relates to an improved process for the preparation of polyisocyanates with a biuret structure by continuous reaction of excess amounts of organic diisocyanates having...
8445622 Process for preparing polyisocyanates  
The present invention relates to a process for preparing polyisocyanates by oligomerization of isocyanates.
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...
8063144 Polyisocyanate mixtures, a process for their preparation and their use in coating compositions  
The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5%...
8044234 Bioabsorbable surgical composition  
Compounds are provided which can form bioabsorbable compositions useful as adhesives or sealants for medical/surgical applications. In embodiments, suitable compositions may possess various...
8039574 Method for the preparation of low-viscosity (poly) isocyanates  
A low viscosity polyisocyanate composition containing at least one isocyanate dimer having a uretidinedione unit is prepared from a reaction medium containing at least one isocyanate monomer in...
7875693 Synthesis of biurets and isocyanates with alkoxysilane functions, formulations containing same and use thereof  
The invention relates to a composition and a method of preparing one such composition and an isocyanatoalkoxysilane; the polyisocyanate composition contains at least two different oligomeric...
7635742 Modified isocyanates  
Modified stable polyisocyanates are described having at least one isocyanate function modified by a group having cross-linking functionality. The modified stable polyisocyanates may be prepared by...
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  
PCT No. PCT/EP96/03003 Sec. 371 Date Mar. 9, 1998 Sec. 102(e) Date Mar. 9, 1998 PCT Filed Jul. 9, 1996 PCT Pub. No. WO97/03044 PCT Pub. Date Jan. 30, 1997In a process and an apparatus for...
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...
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...
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...
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...
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 R1 represent specified groups are produced by phosgenation of the corresponding...
5530154 Prepolymers containing isocyanate groups  
The invention relates to prepolymers containing isocyanate groups which can be prepared by reacting a) organic isocyanates with b) polyetherols containing at least 2 hydroxyl groups per molecule...
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 --NH2 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...
4271087 Carbamylbiuret-modified polyisocyanates  
A carbamylbiuret-modified polyisocyanate of the formula: ##STR1## wherein n is an integer of from about 1 to about 20; R is a divalent radical containing from about 1 to about 18 carbon atoms; and...
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...

Matches 1 - 50 out of 77 1 2 >