Abstract: The present invention relates to a process for the in situ preparation of stable dispersions of polyisocyanate polyaddition products in hydroxyl-containing compounds as dispersing agents, by a process which comprises reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia in3. compounds having at least one hydroxyl group,compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and wherein the starting components are reacted together in the presence of more than 4% by weight of water, based on the reaction mixture including water, the process being characterized in that the polyisocyanate polyaddition reaction is carried out in the presence of a polymer latex or in the solution of an ionic, linear polyurethane. If desired, the water is subsequently removed in known manner. The invention also relates to the use of the dispersions made by this process in preparing polyurethane resins.

Abstract: The present invention relates to a process for the "in situ" preparation of stable dispersions of polyisocyanate polyaddition products in hydroxyl containing compounds as dispersing agents which comprises reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in3. compounds having at least one hydroxyl group, compounds 3 having secondary hydroxyl groups if compounds 2 have primary hydroxyl groups and at least one of the components 1 or 2 having ionic groups and/or groups capable of salt formation, in the presence of from 2 to 50% by weight of water, based on the total quantity of reaction mixture, the improvement which comprises carrying out the polyisocyanate polyaddition reaction in the presence of a polymer latex or the solution of an ionic polyurethane. The invention also relates to the use of the stable dispersions made by the above process in making polyurethane resins.

Abstract: This invention relates to a process for the preparation of finely divided, stable and relatively low viscosity dispersions of ionic polyisocyanate polyaddition products in compounds having hydroxyl groups by reacting(1) organic polyisocyanate with(2) compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in(3) compounds having at least one hydroxyl group,with the proviso that compounds (3) have secondary hydroxyl groups if compounds with primary hydroxyl groups are used as compound (2), and further characterized in that at least one of the components (1) or (2) has groups which are ionic and/or capable of salt formation.

Abstract: This invention relates to a process for the in situ preparation of stable dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agent by a process which comprises reacting(1) organic polyisocyanates with(2) compounds having primary and/or secondary amino groups and/or primary hydroxyl groups and/or ammonia, in(3) compounds having at least one hydroxyl group, whereincompounds (3) have secondary hydroxyl groups in cases when compounds (2) have primary hydroxyl groups and wherein the components are reacted in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water.

Abstract: This invention relates to a process for working up the distillation residue obtained in the commercial production of tolylene diisocyanate by grinding, optionally accompanied and/or followed by chemical modification reactions. The finely divided powder obtained may be used as a reactive filler in the production of a variety of plastics.

Abstract: This invention relates to a process for the production of optionally cellular polyurethane plastics using a reactive filler obtained by finely grinding a distillation residue of the type accumulating in the commercial production of tolylene diisocyanate. It is possible in this way to recycle the previously unuseable slag-like residues and at the same time to improve the mechanical properties of the polyurethane plastics filled with them.

Abstract: The instant invention is directed to a process for the separation of aqueous sludges in the purification of effluents in purification plants, comprising:(a) mixing organic and/or inorganic aqueous sludges with ground monomer-free tolylene diisocyanate (TDI) distillation residues having a mean particle size of less than 2 mm;(b) removing the water from the resulting purified sludges; and(c) disposing of the purified sludges.

Abstract: This invention relates to a process for the preparation of a finely divided, stable and relatively low viscosity dispersion of a polyisocyanate polyaddition product and an aminoplast and/or phenoplast and/or copolymer thereof in a hydroxyl containing compound and the use of such a dispersion as the starting component for the production of a polyurethane resin.

Abstract: This invention relates to stable suspensions of substantially monomer-free, insoluble, powdered tolylene diisocyanate distillation residues in polyhydroxyl compounds, to a process for producing these suspensions and to the use of the suspensions thus produced as the polyol component in the production of optionally foamed polyurethane plastics.

Abstract: This invention relates to a process for the production of optionally cellular polyurethane plastics using a reactive filler obtained by finely grinding a distillation residue of the type accumulating in the commercial production of tolylene diisocyanate. It is possible in this way to recycle the previously unuseable slag-like residues and at the same time to improve the mechanical properties of the polyurethane plastics filled with them.

Abstract: This invention relates to a process for the preparation of a finely divided, stable and relatively low viscosity dispersion of a polyisocyanate polyaddition product and an aminoplast and/or phenoplast and/or copolymer thereof in a hydroxyl containing compound and the use of such a dispersion as the starting component for the production of a polyurethane resin.

Abstract: The instant invention is directed to a method for bonding one or more substrates by applying adhesives comprising organic polyisocyanates and compounds containing isocyanate-reactive hydrogen atoms which react to form polyurethanes, or moisture-hardening reaction products containing free isocyanate groups or excess quantities of polyisocyanates and compounds containing isocyanate-reactive hydrogen atoms, the improvement wherein said compounds containing isocyanate-reactive hydrogen atoms are dispersions of polymers in organic polyhydroxyl compounds.

Abstract: A process for preparing modified aqueous synthetic resin dispersions, comprising introducing organic diisocyanates which are liquid at room temperature into polyurethane-containing, non-sedimenting, aqueous synthetic resin dispersions, optionally in the presence of catalysts which accelerate the isocyanate polyaddition reaction and/or the dimerization of isocyanate groups and/or the carbodiimidization of isocyanate groups and/or the trimerization of isocyanate groups, mixing the organic diisocyanate with the aqueous dispersion at a temperature at which no visible foaming occurs, maintaining the temperature after addition of all the diisocyanate until at least 50% of the isocyanate groups in the added diisocyanate have undergone reaction and, if desired, completing the reaction by subsequently heating to temperatures up to 100.degree. C.These modified aqueous dispersions contain dispersed latex particles which are enveloped with polyurea formed from the diisocyanates.

Abstract: The instant invention relates to the preparation of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents. The process broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100.degree. C., and thereafter at least partially distilling off the water.

Abstract: This invention relates to a process for the production of new, non-foamed urethane and/or urea group-containing polyisocyanate polyaddition products which contain both cationic and also anionic groups chemically bound into the same molecule of said polyisocyanate polyaddition products, to the polyaddition products obtainable by this process and to the use thereof for coating flexible and non-flexible sheet-form materials.

Abstract: The present invention relates to the production of polyurethane resins and foams from stable dispersions of ionic polyisocyanate-polyaddition products in a hydroxyl containing compound as dispersing agent which are formed by the process which comprises reacting:(1) organic polyisocyanate with(2) compounds having primary and/or secondary amino grops and/or primary hydroxyl groups in(3) compounds having at least one hydroxyl group,With the proviso that compounds (3) have secondary hydroxyl groups if compounds with primary hydroxyl groups are used as compound (2), and further characterized in that at least one of the components (1) or (2) has groups which are ionic and/or capable of salt formation.

Abstract: A method is provided for making microporous, vapor-permeable polyurethane sheets by coagulating a polyurethane in a polar solvent with a non-solvent for the polyurethane, wherein a polyurethane polysiloxane is added to the solution of the polyurethane in the polar solvent.

Abstract: This invention relates to a continuous process for the production of polyisocyanate polyaddition products using a multi-phase reaction flow tube as reactor.

Abstract: This invention relates to a process for making optionally cellular cross-linked elastomeric polyurethane resins from(a) polyisocyanates,(b) higher molecular weight polyhydroxyl and/or polyamino compounds containing filler particles,(c) chain lengthening agents and, optionally,(d) blowing agents, catalysts and other additives known per se,Wherein filler particles capable of being cross-linked with the formaldehyde are used and wherein the elastomeric polyurethanes which contain fillers are cross-linked with formaldehyde or formaldehyde releasing compounds, after the chain lengthening reaction has been substantially completed.

Abstract: This invention relates to the use of certain finely divided, stable and relatively low viscosity dispersions of polyisocyanate polyaddition products in compounds having hyroxyl groups. The dispersions are produced by reacting1. organic polyisocyanates with2. compounds having primary and/or secondary amino groups and/or primary hydroxyl groups in3. compounds having at least one hydroxyl group, whereinCompounds (3) have secondary hydroxyl groups in cases when compounds (2) have primary hydroxyl groups and wherein the components are reacted in the presence of more than 4% by weight of water, based on the quantity of reaction mixture including water.