Abstract: In the production of organomineral products which are used, in particular, within the scope of the process for stratum consolidation, it is a disadvantage that foams are, as a rule used which have inadequate strength and that, in addition, the hard polymer segments which are responsible for the strength of the organomineral products, do not contribute to the adhesion of the organomineral products, if they are used in situ for stratum consolidation. A process is disclosed for reacting organic polyisocyanates with epoxy resins in the presence of aqueous alkali-metal silicate solutions, the coreactants being used in an amount of substance ratio corresponding to the relationship ##STR1## so that foaming of the reaction mixture is prevented and an organic polymer structure containing oxazolidinone ring structures is formed which bears adhesion-improving OH groups.

Abstract: The invention relates to organomineral products of high strength obtainable by reacting a polyisocyanate in an aqueous alkali silicate solution in the presence of a catalyst prompting the trimerization of the polyisocyanate. In preparing them, the catalyst is used in an amount of 5.5 to 14.5 mmole per mole of NCO groups in the reaction mixture. The organo-mineral products of the invention are suitable as construction, coating, sealing or insulating materials or as putty or adhesives.

Abstract: The invention relates to organomineral products of high strength obtainable by reacting a polyisocyanate in an aqueous alkali silicate solution in the presence of a catalyst prompting the trimerization of the polyisocyanate. In preparing them, the catalyst is used in an amount of 5.5 to 14.5 mmole per mole of NCO groups in the reaction mixture. The organomineral products of the invention are suitable as construction, coating, sealing or insulating materials or as putty or adhesives.

Abstract: The invention relates to a process for consolidating and sealing coal and/or rock, soil and brick formations in mining, tunnelling and construction by reacting polyisocyanates and aqueous alkali silicate solutions in the presence of a catalyst prompting the trimerization of the polyisocyanate. The catalyst is used in an amount of 6.0 to 14.5 mmole per mole of NCO groups in the reaction mixture.When the reaction mixture is introduced into the coal and/or rock, soil and brick formation to be consolidated and is cured, excellent consolidation results are achieved on account of the formation of an "interpermeated network" of inorganic and organic polymer.

Abstract: The present invention provides a process for the continuous production of plates, which are optionally laminated on all sides, from foamed synthetic resins and especially from polyurethane hard foams, in which a foaming synthetic resin is passed through a channel formed by endless running bands, wherein the side bands are subjected to external pressure and press towards the middle of the plate, said side bands being pressed in the course of the foaming by the foaming pressure thereby arising into their actual side-limiting positions, said side bands finally assuming the positions which correspond to the desired plate breadth and contour.The present invention also provides a device for taking up the lateral foam pressure in continuously operating band plants, comprising counterpressure devices which exert on the side bands, adapted to move in the plane of the plate, an optimum counterpressure for the reaction characteristics of the foaming synthetic resin.

Abstract: The supply of a reagent to a mixing chamber is controlled by apparatus comprising a housing 1 having an inlet for the reactant, an outlet 4 to the mixing chamer 5, an inlet 3 for a flushing medium, an outlet 6 for recirculating the reactant and, within the housing, a movable member 7 having first and second ducts 10 and 12, duct 10 connecting inlet 2 with either of outlets 4 and 6 independently, and duct 12 connecting inlet 3 with outlet 4 when inlet 2 and outlet 6 are connected, inlet 3 being blocked when inlet 2 and outlet 4 are connected.

Abstract: The present invention relates to a process for the manufacture of foamed or non-foamed compositions, in which one or more organic or inorganic compounds containing at least two isocyanate groups is or are reacted in the presence of an alkaline aqueous solution, an alkaline aqueous suspension or an alkaline aqueous slurry of an alkali metal hydroxide and/or alkaline earth metal hydroxide, and of one or more catalysts and, optionally, inert fillers and/or, optionally, one or more volatile substances as blowing agents. According to the invention, a mixture of the compound or compounds containing the isocyanate groups and the alkali metal hydroxide or oxide and/or alkaline earth metal hydroxide or oxide is added to a mixture of water and catalyst. The oxide employed is preferably calcium oxide.

Abstract: Process for the production of polyurethanes dissolved in a solvent by mixing linear pre-adducts having terminal NCO groups dissolved in solvents with hydrazines and/or dihydrazine compounds and or diamines dissolved in solvents, for the purpose of forming partially cross-linked polyurethanes, whilst continuously measuring the viscosity until the viscosity shows a value which is located in the shaded zone of the section of curves shown in FIG. 1, the addition of the pre-adduct solution being carried out at such a speed that the final solution has solids content of between 25 and 35 per cent by weight, and coagulation of the obtained solution to fabricated shapes, especially to microporous sheet structures.

Abstract: This invention relates to a process for the manufacture of foams based on phenolic resins, wherein phenolic resins are reacted, in the presence of metal powders and/or metal oxide powders, with organic diisocyanates and/or polyisocyanates.

Abstract: This invention relates to a process for the manufacture of an organo-metallate polymere which comprises reacting in a liquid phase a metallate with a pseudohalide compound and/or other polymerizable compound and allowing the reaction to proceed to completion.

Abstract: This invention relates to a process for producing crosslinked elastomeric shaped polyurethane structures from crosslinked polyurethanes dissolved in solvents produced by the combination of the following steps:1. preparation of an NCO pre-adduct in a non-critical NCO/OH proportion from a treated polyol and the corresponding diisocyanate in a highly polar solvent;2. preparation of a solution containing crosslinked polyurethanes by introducing into the polymerization vessel a chain propagating and/or chain crosslinking agent and/or a combination thereof, and stirring into said vessel the NCO pre-adduct solution from step 1 such that the viscosity becomes an indication of the degree of the instantaneously occurring chain propagation and chain crosslinking reactions. In this way a solution is obtained which is at the borderline state between solution and gel and in which highly crosslinked polymer portions are uniformly distributed;3. molding;4. removal of the solvent by evaporation.

Abstract: This invention relates to a non-flammable homogeneous or foamed organo-red mud polymers, which essentially comprise the reaction product of red mud and a compound possessing at least two isocyanate groups.

Abstract: This invention relates to a process for producing finished and/or irreversibly embossed microporous sheet structures by coagulation of a polyurethane solution, in which prior to the coagulation of the polyurethane solution a finishing agent is mixed into it or a finishing agent is applied to the free surface of the polyurethane solution which has been spread out flat and embossing is then carried out during or shortly after the coagulation or after the washing, but still before the drying, or else the microporous sheet structure obtained and into which the finishing agent has been mixed previously is, after drying, pressed between two plates or passed under pressure between at least two oppositely rotating rolls, at least one of which is highly polished.