Abstract: The invention relates to a method for producing polyether carbonate polyols, (i) one or more alkylene oxide(s) and carbon dioxide being added to one or more H-functional starter substance(s) in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, a reaction mixture containing the polyether carbonate polyol being obtained, characterized in that (ii) at least one component K is added to the obtained reaction mixture containing the polyether carbonate polyol, wherein component K is selected from at least one compound that contains a phosphorus-oxygen bond or a compound of phosphorus that can form one or more P—O bonds by reaction with OH-functional compounds.

Abstract: The invention relates to prepregs and to a method for producing storage-stable polyurethane prepregs (pre-impregnated fibers) using polyols with a high content of secondary hydroxyl end groups, to composite fiber components (composite components) which are produced from the prepregs and which can be obtained by impregnating fiber-shaped materials such as woven fabrics and fleece, and to a method for producing said composite fiber components.

Abstract: The invention relates to a method for producing polyether carbonate polyols, (i) one or more alkylene oxide(s) and carbon dioxide being added to one or more H-functional starter substance(s) in the presence of a double metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, a reaction mixture containing the polyether carbonate polyol being obtained, characterized in that (ii) at least one component K is added to the obtained reaction mixture containing the polyether carbonate polyol, wherein component K is selected from at least one compound that contains a phosphorus-oxygen bond or a compound of phosphorus that can form one or more P—O bonds by reaction with OH-functional compounds.

Abstract: The present invention relates to a process for producing a hydroxy amino polymer comprising the steps: a) Reaction of an H functional starter compound bearing at least one Zerewitinoff active H atom with an unsaturated, cyclical carboxylic acid anhydride and at least one alkylene oxide compound for obtaining a prepolymer bearing hydroxyl groups, b) Addition of a primary amine and/or of ammonia to the double bond(s) of the prepolymer bearing hydroxyl groups obtained according to step a) for obtaining the hydroxy amino polymer, wherein the ratio of added amino groups to hydroxyl groups in a hydroxy amino polymer is at least 0.6. Furthermore, the invention relates to a hydroxy amino polymer, which can be achieved according to this process as well as a polyurea/polyurethane system, which contains such a hydroxy amino polymer.

Abstract: The invention relates to composite elements comprising a thermoplastic polymer and an adjacent polyurethane bonded thereto, to a process for production thereof and to the use thereof.

Abstract: The present invention relates to a composition comprising 10 to less than 50 wt.-% of at least one oligomeric polyisocyanate a-1) based on hexamethylene diisocyanate and more than 50 to 90 wt.-% of at least one polyisocyanate a-2) based on isophorone diisocyanate, comprising monomeric isophorone diisocyanate and at least one oligomeric isophorone diisocyanate, and an isocyanate-reactive component selected from the group consisting of polyester polyol, polyether polyol and mixtures thereof. It has been shown that the above mentioned mixture of the specific isocyanate group containing components improves the thermal and mechanical properties of a cured composition. Thus prepared molded articles are particularly suitable for the preparation of spectacle lenses, inter alia due to these properties.

Abstract: The present invention relates to a polyurea system, the use of such a polyurea system for sealing, linking, gluing, or covering of cellular tissue, and a dosing system having two chambers for a polyurea system such as this. The polyurea system comprises as components: A) an isocyanate-functioning prepolymer, which can be derived by reacting aliphatic isocyanates with polyoles, and B) an amino-functioning ester of aspartic acid. According to the invention, water and/or tertiary amine is added to the system, in order to increase the reacting speed of the prepolymer with the amino-functioning ester of aspartic acid while decreasing the setting time at the same time.

Abstract: The present invention relates to a process for preparing polyether polyols by addition of alkylene oxides onto H-functional starter substances, characterized in that at least one urethane alcohol of formula (II) where R1 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R2 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R is H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl, C2 to C24-alkenyl, C2 to C24-alkynyl, each of which may optionally be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, is used as H-functional starter compound.

Abstract: The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.

Abstract: The invention relates to a method for oxidative electrochemical amination of non-activated or deactivated aromatic systems by means of boron-doped diamond anodes, and in particular to the production of 1,5-diaminonaphthalene and 1-amino-5-nitronaphthalene according to said method.

Abstract: The present invention relates to a process for producing a hydroxy amino polymer comprising the steps: a) Reaction of an H functional starter compound bearing at least one Zerewitinoff active H atom with an unsaturated, cyclical carboxylic acid anhydride and at least one alkylene oxide compound for obtaining a prepolymer bearing hydroxyl groups, b) Addition of a primary amine and/or of ammonia to the double bond(s) of the prepolymer bearing hydroxyl groups obtained according to step a) for obtaining the hydroxy amino polymer, wherein the ratio of added amino groups to hydroxyl groups in a hydroxy amino polymer is at least 0.6. Furthermore, the invention relates to a hydroxy amino polymer, which can be achieved according to this process as well as a polyurea/polyurethane system, which contains such a hydroxy amino polymer.

Abstract: The present invention relates to a method for producing a polyester polyol having a concentration of ether groups in the range from 9.0 mol/kg of polyester polyol to 22 mol/kg polyester polyol, characterized in that (i) in a first step (A) isophthalic acid, optionally in the form of a C1-C4 alkyl ester, and/or terephthalic acid, optionally in the form of a C1-C4 alkyl ester, is reacted with (B) oligoethylene glycol of the formula H—(OCH2CH2)n—OH having a numerical average number of oxyethylene groups n in the range from 3.0 to 9.0, in the presence of at least one catalyst selected from the group made up of tin(II) salts, bismuth(II) salts, and titanium tetraalkoxylates, at a temperature in the range from 160° C. to 240° C.

Abstract: The present invention relates to a process for producing a hydroxy amino polymer comprising the steps: a) Reaction of an H functional starter compound bearing at least one Zerewitinoff active H atom with an unsaturated, cyclical carboxylic acid anhydride and at least one alkylene oxide compound for obtaining a prepolymer bearing hydroxyl groups, b) Addition of a primary amine and/or of ammonia to the double bond(s) of the prepolymer bearing hydroxyl groups obtained according to step a) for obtaining the hydroxy amino polymer, wherein the ratio of added amino groups to hydroxyl groups in a hydroxy amino polymer is at least 0.6. Furthermore, the invention relates to a hydroxy amino polymer, which can be achieved according to this process as well as a polyurea/polyurethane system, which contains such a hydroxy amino polymer.

Abstract: The present invention relates to a method for preparing polyether carbonate polyols by the addition of alkylene oxides and carbon dioxide onto H-functional starter compounds. The method is characterized in that at least one urethane alcohol according to formula (II) is used as an H-functional starter compound, wherein R represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R2 represents a linear or branched C2 to C24-alkylene which can be optionally interrupted by heteroatoms such as O, S or N and can be substituted; R3 represents H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-arylalkyl, C2 to C24-alkenyl, C2 to 24-alkinyl, that can each be optionally interrupted by heteroatoms such as O, S, or N and/or may each he substituted with alkyl, aryl, and/or hydroxyl.

Abstract: The present invention relates to a polyurea system, the use of such a polyurea system for sealing, linking, gluing, or covering of cellular tissue, and a dosing system having two chambers for a polyurea system such as this. The polyurea system comprises as components: A) an isocyanate-functioning prepolymer, which can be derived by reacting aliphatic isocyanates with polyoles, and B) an amino-functioning ester of aspartic acid. According to the invention, water and/or tertiary amine is added to the system, in order to increase the reacting speed of the prepolymer with the amino-functioning ester of aspartic acid while decreasing the setting time at the same time.

Abstract: The present invention relates to homogeneous extruded articles made from thermoplastically processable polyurethanes based on polyester diols formed from succinic acid and 1,3-propanediol.

Abstract: The present invention relates to a process for preparing polyether polyols by addition of alkylene oxides onto H-functional starter substances, characterized in that at least one urethane alcohol of formula (H) where R1 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R2 is linear or branched C2 to C24-alkylene which may optionally be interrupted by heteroatoms such as O, S or N and may be substituted, R3 is H, linear or branched C1 to C24-alkyl, C3 to C24-cycloalkyl, C4 to C24-aryl, C5 to C24-aralkyl. C2 to C24-alkenyl, C2 to C24-alkynyl, each of which may optionally be interrupted by heteroatoms such as O, S or N and/or each of which may be substituted by alkyl, aryl and/or hydroxyl, is used as H-functional starter compound.

Abstract: The invention relates to a process for producing polyether carbonate polyols through an addition reaction of alkylene oxides and carbon dioxide onto one or more H-functional starter substances in the presence of a couble metal cyanide catalyst or in the presence of a metal complex catalyst based on the metals zinc and/or cobalt, characterized in that one or more H-functionalstarter substances containing at least 1000 ppm of component (K) is/are continuously metered into the reactor during the reaction, where component (K) is selected from at least one compound containing a phosphorus-oxygen bond and a phosphorus compound that can form one or more P—O bonds through reaction with OH-functional compounds.

Abstract: The invention relates to composite elements comprising a thermoplastic polymer and an adjacent polyurethane bonded thereto, to a process for production thereof and to the use thereof.

Abstract: The present invention relates to a polyurea system, the use of such a polyurea system for sealing, linking, gluing, or covering of cellular tissue, and a dosing system having two chambers for a polyurea system such as this. The polyurea system comprises as components: A) an isocyanate-functioning prepolymer, which can be derived by reacting aliphatic isocyanates with polyoles, and B) an amino-functioning ester of aspartic acid. According to the invention, water and/or tertiary amine is added to the system, in order to increase the reacting speed of the prepolymer with the amino-functioning ester of aspartic acid while decreasing the setting time at the same time.