Abstract: The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtained in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.

Abstract: A mobile platform includes a chassis, a sensor module and at least one holding mechanism. In an embodiment, the at least one holding mechanism is designed to guide a first medical device and is configured to position the first medical device in at least one operating position within an adjusting range.

Abstract: The invention relates to a process for preparing a polyoxyalkylene carbonate polyol by reacting a polyoxyalkylene polyol with a cyclic carbonate in the presence of an amine catalyst. The invention further relates to polyoxyalkylene carbonate polyols obtainable using the method according to the invention and to a process for preparing polyurethanes by reacting the polyoxyalkylene carbonate polyols according to the invention with polyisocyanates.

Abstract: The present invention relates to a process for preparing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of an alkaline metal cyanide salt, an organic complex ligand and optionally a complex-forming component, wherein the metal cyanide salt is one or more compound(s) and is selected from the group consisting of potassium hexacyanocobaltat(III), potassium hexacyanoferrate(II), potassium hexacyanoferrate(III), calcium hexacyanocobaltate(III) and lithium hexacyanocobaltat(III), where the organic complex ligand is one or more compound(s) and is selected from the group consisting of dimethoxyethane, tert-butanol, 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-tert-butyl ether and 3-methyl-3-oxetanemethanol, and wherein the alkaline metal cyanide salt used has an alkalinity by the titration method disclosed in the Experimental of between 0.700% and 3.

Abstract: The present invention relates to a method for producing a double metal cyanide (DMC) catalyst, comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand, optionally a complex-forming component to form a dispersion, the dispersion being produced using a mixing nozzle and a peroxide. The invention further relates to double metal cyanide (DMC) catalysts obtainable by means of the method according to the invention and to the use of DMC catalysts to produce polyoxyalkylene polyols.

Abstract: A process for continuous production of polyether carbonate polyols by the addition of alkylene oxide and carbon dioxide in the presence of a DMC catalyst or a metal complex catalyst based on the metals cobalt and/or zinc, onto an H-functional starter substance is provided. Wherein (?) the H-functional starter substance, alkylene oxide and catalyst are continuously metered into the reaction during the addition and the resulting reaction mixture is continuously discharged from the reactor, wherein (i) before step (?), a suspension of catalyst in suspension medium and/or H-functional starter substance in the reactor is adjusted to a temperature T1 ranging from 100° C. to 150° C., wherein T1 is at least 10% above a temperature T2 and T2 is a temperature ranging from 50° C. to 135° C., and (ii) from commencement of the addition of alkylene oxide in step (?) the temperature is continuously reduced to the temperature T2.

Abstract: A method for preparing polyether carbonate polyols by means of the following steps: (i) adding alkylene oxide and carbon dioxide onto an H-functional starter substance in the presence of a double metal cyanide catalyst or a metal complex catalyst based on the metals zinc and/or cobalt to obtain a reaction mixture containing the polyether carbonate polyol, (ii) introducing at least one component K to the reaction mixture containing the polyether carbonate polyol, characterized in that the component K is at least one compound selected from the group consisting of monocarboxylic acids, polycarboxylic acids, hydroxycarboxylic acids and vinylogous carboxylic acids, wherein compounds containing a phosphorus-oxygen bond or compounds of phosphorus that can form one or more P—O bonds through reaction with OH-functional compounds, and acetic acid are excluded from component K.

Abstract: The invention relates to a process for producing a polyoxyalkylene polyol, comprising depositing an alkylene oxide onto an H-functional starter substance in the presence of a double metal cyanide (DMC) catalyst, wherein the alkylene oxide is dosed at the mass flow rate m(alkylene oxide), the H-functional starter substance is dosed at the mass flow rate m(starter substance), and the double metal cyanide (DMC) catalyst is dosed in a dispersant at the mass flow rate m(DMC) continuously into the reactor with the reaction volume V during the reaction, and the resulting reaction mixture is continuously removed from the reactor, and wherein the quotient of the sum of the mass flow rates ?{dot over (m)} of {dot over (m)}(alkylene oxide), {dot over (m)}(starter substance) and {dot over (m)}(DMC) to give the reaction volume V in the steady state is greater than or equal to 1200 g/(h·L).

Abstract: The present invention relates to a method for producing polyurethane foams by reacting an isocyanate component with an isocyanate-reactive component comprising at least one polyethercarbonate polyol, the reaction taking place in the presence of a component K selected from one or more compounds from the group consisting of K1 esters of mono- or polybasic carboxylic acids whose (first) dissociation has a pKa of 0.5 to 4.0, K2 mono-, di- and polysulfonates of mono- and polyfunctional alcohols, and K3 one or more compounds from the group consisting of K 3.1 esters of phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, phosphonous acid and phosphinous acid, these esters each containing no P—OH group, K3.

Abstract: A remote communication facility is described. The remote control facility of an embodiment includes a data capture unit for capturing state data and machine data from a medical technology facility; an evaluating unit for generating a digital twin based upon the state data and machine data; a display unit for displaying the digital twin and a control unit for controlling the medical technology facility based upon the displayed data of the digital twin. In addition, an operation and treatment system is described. A remote communication method is also described.

Abstract: The invention relates to a method for producing a polyoxyalkylene polyester polyol by reacting a polyoxyalkylene polyol with a lactone in the presence of a Brønsted acid catalyst, wherein the catalyst has a pKa value of 1 or less; the number-average molar mass of the polyoxyalkylene polyol is ?1000 g/mol, preferably ?1500 g/mol, particularly preferably ?2000 g/mol; and in the lactone a CH2 group is bonded to the ring oxygen. The invention further relates to polyoxyalkylene polyester polyols obtainable using the method according to the invention, and to a method for producing polyurethanes by reacting the polyoxyalkylene polyester polyols according to the invention with polyisocyanates.

Abstract: The present invention relates to a process for preparing a double metal cyanide catalyst (DMC) comprising the reaction of an aqueous solution of a cyanide-free metal salt, an aqueous solution of a metal cyanide salt, an organic complex ligand and a complex-forming component, to form a dispersion, wherein the reaction is effected using a mixing nozzle and wherein the process temperature of the dispersion during the reaction is between 26° C. and 49° C. The subject matter of the invention further encompasses double metal cyanide catalysts (DMC) obtainable in accordance with the process according to the invention and also the use of the DMC catalysts for the preparation of polyoxyalkylene polyols.

Abstract: The invention relates to a method for producing polyether carbonate polyols, wherein (i) in a first step a polyether carbonate polyol is produced from one or more H-functional starter substances, one or more alkylene oxides, and carbon dioxide in the presence of at least one DMC catalyst, and (ii) in a second step the polyether carbonate polyol is chain-extended with a mixture of at least two different alkylene oxides in the presence of at least one DMC catalyst. The invention further relates to polyether carbonate polyols that contain a terminal mixed block of at least two alkylene oxides and to a method for producing soft polyurethane foams, wherein a polyol component containing a polyether carbonate polyol according to the invention is used.

Abstract: The present invention provides a process for removing gaseous constituents dissolved in liquid reaction mixtures in the copolymerization of alkylene oxide and carbon dioxide, characterized in that (?) prior to decompression the liquid reaction mixture has a pressure of 5.0 to 100.0 bar (absolute), wherein the following process stages are performed in the specified sequence: (i) decompression of the reaction mixture by at least 50% of the prevailing pressure, (ii) subsequent droplet separation with first defoaming and (iii) subsequent bubble separation with second defoaming to clarify the liquid phase, wherein the process stages (i) to (iii) are performed one or more times until the resulting reaction mixture has a pressure of 0.01 to <5.00 bar (absolute), and also a process for preparing polyethercarbonate polyols comprising the process stages (i)-(iii).

Abstract: A mobile platform includes a chassis, a sensor module and at least one holding mechanism. In an embodiment, the at least one holding mechanism is designed to guide a first medical device and is configured to position the first medical device in at least one operating position within an adjusting range.

Abstract: A process for preparing polyol, wherein, in a first process stage, a diol is prepared by a process comprising: (1-i) adding alkylene oxide and carbon dioxide onto an H-functional starter substance in the presence of a catalyst to obtain polyethercarbonate polyol and a cyclic carbonate, (1-ii) separating the cyclic carbonate from the resulting reaction mixture from step (1-i), (1-iii) hydrolyzing the cyclic carbonate separated from step (1-ii) to carbon dioxide and diol, and (1-iv) optionally purifying the diol resulting from step (1-iii) by distillation.

Abstract: A portable expansion unit controls safety-relevant functions of a medical device. The expansion unit has a retaining device to be adjusted to the size of a flat, portable operating unit of the medical device. The retaining device mechanically connects the expansion unit detachably with the portable operating unit. A communication module establishes a safety-related data connection with the medical device. This combines a mobile, portable consumer operating device, such as a tablet computer or smartphone, which does not fulfill any particular safety-related requirements, with an expansion unit, which permits the control of safety-relevant functions with the aid of a safety-related radio protocol.

Abstract: A process for producing polyurethane foams by reaction of the components: A, B, C, and D. Component A comprises a polyol component, comprising A1 which is 40 to 100 parts by weight of polyether carbonate polyol and A2 which is 0 to 60 parts by weight of polyether polyol. Component B can comprise B1 a catalyst, and B2 optionally auxiliary and additive substances. Component C can comprise water and/or physical blowing agents. Component D can comprise di- and/or polyisocyanates. Production is carried out at an index of 90 to 120 and in the presence of a component K, wherein the component K comprises a reaction product of alkoxylated phosphoric acid with 1,3-dicarbonyl compound or carboxylic anhydride. A polyurethane foam and a method for producing articles are also disclosed.

Abstract: A process for preparing polyethercarbonate polyols by adding alkylene oxide and carbon dioxide onto an H-functional starter substance, wherein, (a) a reactor is initially charged with a portion of H-functional starter substance, optionally together with DMC catalyst and (?) an H-functional starter substance and a suspension medium having no H-functional groups are metered continuously into the reactor during the reaction.

Abstract: The present invention concerns a method for producing poly(oxyalkylene) polyols started with phosphorus-containing compounds, which have an inner block containing high amounts of EO, as well as the poly(oxyalkylene) polyols obtainable in this manner. Furthermore, the present invention comprises a method for producing polyurethane foams, preferably flexible polyurethane foams, by reacting an isocyanate component with a component reactive to isocyanates, which comprises at least one poly(oxyalkylene) polyol started with phosphorus-containing compounds with an inner block containing high amounts of EO, the polyurethane foams produced by the inventive method and their application.