Abstract: The present invention is directed to a process for the production of polyurea-based microcellular moldings comprising reacting(a) at least one diisocyanate or polyisocyanate containing only aromatically bound isocyanate groups,(b) at least one compound containing at least two isocyanate-reactive groups, and(c) optionally the auxiliaries and additives known in polyurethane chemistry, in closed molds, components (a)-(c) being processed as a one-shot system by reaction injection molding, characterized in that component (b) comprises at least one polyether compound (b1) optionally in admixture with other isocyanate-reactive compounds and containing at least 3 aliphatically bonded ether groups and n-aliphatically bonded isocyanate-reactive groups, n standing for an integer or, statistically a fraction of from 2-4(i) at least (100:n) % of the isocyanate-reactive groups present in component (b1) being aliphatically bonded primary and/or secondary amino groups,(ii) at least 10 equivalent % of said amino groups being

Abstract: A hair curler for rolling up the hair having a cylindrical rod body containing a catalytic heating device. The rod body is permanently affixed on a handle which is designed as a fuel tank. A thermostatically controlled valve device, between the fuel tank and the rod body, regulates the fuel supply from the fuel tank to the catalytic heating device. An opening allows air to enter the chamber which contains the catalyst. An ignition device is situated at the free end of the cylindrical rod body. The ignition device is activated by means of an operating key which closes an electrical circuit, to heat an incandescent filament, and thus to initiate catalytic combustion at the catalyst. A chamber is situated between the battery and the combustion chamber. This chamber is flushed through by ambient air and inhibits heat flow. The electrical conductors of the ignition device are conducted through this chamber.

Abstract: Pulverulent coating materials consisting of saponified ethylene vinyl acetate copolymers and, as cross-linking agents, polycarbodiimides and/or polyuretone imines.

Abstract: The instant invention relates to a process for producing stable equilibrium mixtures of carbodiimides, uretone imines and organic isocyanates and storage-stable solutions of carbodiimides and uretone imines in polyisocyanates which are free from carbodiimide groups. Either the carbodiimide, or the uretone imine, or both, may contain isocyanate groups. The invention relates to the process for the preparation of these products by so-called heterogeneous catalysis and the use of these products for the production of polyurethane resins.

Abstract: The instant invention is directed to a process for the production of addition compounds of compounds containing hydroxyl groups and carbodiimides substantially free from isocyanate groups, comprising reacting the reactants in the presence of from 0.01 to 3% by weight, based on the reaction mixture, of a metal catalyst, the improvement wherein a tin compound is used as said metal catalyst.

Abstract: The present invention relates to stable equilibrium mixtures of carbodiimides, uretone imines and organic isocyanates and to stable solutions of carbodiimides and uretone imines in polyisocyanates which are free from carbodiimide groups. Either the carbodiimide, or the uretone imine, or both, may contain isocyanate groups. The present invention also relates to a process for the preparation of such products by "heterogeneous catalysis" and the use thereof for the production of polyurethane resins. According to one embodiment of the process according to the instant invention, individual isocyanates in a mixture of various isocyanates may be carbodiimidized selectively.

Abstract: Pressure-sensitive copying paper containing a solution of a dye-precursor agent in microencapsulated form, wherein the dye-precursor agent is dissolved in a hydrophobic organic solvent and encapsulated in capsules composed of the polyaddition product of a diisocyanate of Formula (I) ##STR1## wherein R represents a divalent aliphatic radical, and a diamine.

Abstract: Compounds having a melting point above 40.degree. C. which compounds contain uretone imine groups and which are substantially free from volatile isocyanate blocking agents which are split off under stoving conditions are excellent crosslinking agents for pulverulent coating compositions based on hydroxyl groups-containing polymers.

Abstract: Microcapsules and a process for the production of these microcapsules the walls of which consist of polycondensates of a film-forming aliphatic polyisocyanate containing at least one biuret group or polyaddition products thereof with a chain-extending agent.

Abstract: New polyols modified by acyl urea groups, process for the preparation thereof and use thereof as starting component for the preparation of preferably foamed polyurethane plastics. The process involves (A) reacting diisocyanatocarbodiimides corresponding to :OCN--R.sup.2 --N.dbd.C.dbd.N .sub.M --R.sup.2 --NCOwith polyhydroxyl compounds corresponding to:A--OH).sub.nto form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partially reacting, the carbodiimide groups remaining in the product of step (A), with a carboxylic acid corresponding to the following general formula: ##STR1## to form acyl urea groups, and (C) distilling off the inert solvent, if used; whereinm represents a number of from 1 to 10;s represents an integer of from 1 to 3; andR.sup.1 represents hydrogen or a monofunctional or--in the form of a bridge to further acyl groups--a di- or trifunctional C.sub.1 -C.sub.18 aliphatic, C.sub.4 -C.sub.15 cycloaliphatic, C.sub.6 -C.sub.

Abstract: The present invention relates to new polyols modified by phosphonoformamidine groups, to a process for the preparation thereof and the use thereof as starting component for the preparation of preferably foamed polyurethane plastics.The process involves (A) reacting diisocyanatocarbodiimides corresponding to the following general formula:OCN--R.sup.2 --N.dbd.C.dbd.N).sub.m R.sup.2 --NCOat a temperature of from about 25 to 130.degree. C., optionally in the presence of an inert solvent, with polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nin an OH/NCO-ratio of from 1.2:1 to 30:1 to form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partially reacting the carbodiimide groups remaining in the product of step (A) by means of a basic catalyst at a temperature of from 25 to 150.degree. C.

Abstract: This invention relates to new polyols modified by guanidine groups, to a process for the preparation thereof and to the use thereof as starting component for the preparation of preferably foamed polyurethane plastics. The process involves (A) reacting diisocyanato-carbodiimides corresponding to the following general formula:OCN--(R.sup.2 -N=C=N).sub.m R.sup.2 --NCOat a temperature of from about 25.degree. to 130.degree. C., optionally in the presence of an inert solvent, with polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nin an OH/NCO-ratio of from 1.2:1 to 30:1 to form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partly reacting, at a temperature of from 0.degree. to 150.degree. C., the remaining carbodiimide groups remaining in the production of Step (A), optionally in the presence of an inert solvent, with an amine, amide or hydrazide corresponding to the following general formula:R.sup.3 --NR.sup.1 H).sub.

Abstract: This invention relates to new polyols modified by guanidine groups, to a process for the preparation thereof and to the use thereof as starting component for the preparation of preferably foamed polyurethane plastics. The process involves (A) reacting diisocyanato-carbodiimides corresponding to the following general formula:OCN--R.sup.2 -N.dbd.C.dbd.N).sub.m R.sup.2 -NCOat a temperature of from about 25.degree. to 130.degree. C., optionally in the presence of an inert solvent, with polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nin an ON/NCO-ratio of from 1.2:1 to 30:1 to form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partly reacting, at a temperature of from 0.degree. to 150.degree. C., the remaining carbodiimide groups remaining in the production of Step (A), optionally in the presence of an inert solvent, with an amine, amide or hydrazide corresponding to the following general formula:R.sup.3 --NR.sup.1 H).sub.

Abstract: The present invention relates to new polyols modified by phosphonoformamidine groups, to a process for the preparation thereof and the use thereof as starting component for the preparation of preferably foamed polyurethane plastics.The process involves (A) reacting diisocyanatocarbodiimides corresponding to the following general formula:OCN--R.sup.2 --N.dbd.C.dbd.N).sub.m R.sup.2 --NCOwith polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nto form a polyhydroxyl compound containing carbodiimide groups and (B) reacting the carbodiimide groups remaining in the product of step (A) by means of a basic catalyst with a phosphite corresponding to the following general formula: ##STR1## to form phosphonoformamidine groups wherein m represents a number of from 1 to 10, andR.sup.1 represents a C.sub.1 -C.sub.18 aliphatic, C.sub.4 -C.sub.15 cycloaliphatic or C.sub.6 -C.sub.

Abstract: This invention relates to new polyols modified by acyl urea groups, to a process for the preparation thereof and to the use thereof as starting component for the preparation of preferably foamed polyurethane plastics. The process involves (A) reacting diisocyanatocarbodiimides corresponding to the following general formula:OCN--R.sup.2 --N.dbd.C.dbd.N).sub.m R.sup.2 --NCOat a temperature of from about 25.degree. to 130.degree. C., optionally in the presence of an inert solvent, with polyhydroxyl compounds corresponding to the following general formula:A--OH).sub.nin an OH/NCO-ratio of from 1.2:1 to 30:1 to form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partially reacting, the carbodiimide groups remaining in the product of step (A) at a temperature of from 25.degree. to 100.degree. C.

Abstract: Production of microcapsules, wherein a film-forming polycarbodiimide with functional terminal isocyanate groups is dissolved in the core material or in an inert solvent and a miscible core material is added and the resulting organic phase is introduced into an immiscible liquid phase which contains a dissolved catalyst for isocyanate reactions, and the microcapsules formed are isolated after the reaction of the shell-forming polymer.

Abstract: 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 this process and the use of these mixtures as isocyanate components in the production of polyurethane plastics by the known isocyanate polyaddition process. In general, the process comprises:(a) mixing organic mono-, di- and/or polyisocyanates with 0.1 to 100 ppm of a phosphorus compound of the general formula ##STR1## wherein R represents a lower alkyl radical, a phenyl radical, an alkoxy radical, a hydrogen atom or an alkenyl radical; a, b, c and d each represent hydrogen, a halogen atom, a lower alkyl, lower alkenyl, phenyl, a cyclohexyl or a polymethylene group which together with two neighboring C-atoms of the heterocyclic ring forms a cycloaliphatic ring; and X represents an oxygen or sulphur atom; at a temperature from about 0.degree. to about 200.degree. C.

Abstract: The instant invention relates to a process for the production of novel modified polyisocyanates containing acylated urea groups and to the products obtained from this process. The process of the instant invention comprises reacting a compound containing isocyanate groups and carbodiimide groups with carboxylic acids in such quantities that from about 0.2 to about 1.2 gram equivalents of carboxyl groups are reacted per gram equivalent of carbodiimide groups.

Abstract: The instant invention relates to novel carbodiimidization catalysts consisting of a high molecular weight, insoluble matrix and low molecular weight carbodiimidization catalysts fixed to the matrix via ionic bonds. The novel high molecular weight catalysts are suitable for the preparation of storage stable, catalyst free, equilibrium mixtures of organic carbodiimides, uretone imines and isocyanates. Either the carbodiimide, or the uretone imine or both may contain isocyanate groups. Alternatively, mono and/or polyisocyanates free from carbodiimide and uretone imine groups may be added to the equilibrium mixture. The catalysts according to the invention are capable of bringing about selective carbodiimidization of individual isocyanates in a mixture of various isocyanates.

Abstract: This invention relates to a process for the production of polyureas by reacting organic polyisocyanates with diamines, optionally in the presence of other polyfunctional compounds, i.e. polyfunctional in the isocyanate polyaddition context, having isocyanate-reactive hydrogen atoms, which is distinguished by the fact that the polyisocyanates used have an NCO-content of about 0.5 to 25%, by weight, and which, in addition, have an acylated urea group ##STR1## content of about 0.5 to 50% by weight and, optionally, a carbodiimide group (-N=C=N-) content of about 0 to 25% by weight.The invention also relates to the use of the polyureas obtained by this process for the production of coatings, lacquer finishes and impregnations.