Abstract: The present invention relates to novel high-value polycarbonate polyols, to processes for the production thereof, to polyisocyanate prepolymers obtainable therefrom and also polyurethane (PUR) and polyurethane urea elastomers which under particularly demanding applications show unique combinations of processing characteristics, hydrolysis and oxidation stability, mechanical and dynamic mechanical properties.

Abstract: The present invention relates to novel high-value polycarbonate polyols, to processes for the production thereof, to polyisocyanate prepolymers obtainable therefrom and also polyurethane (PUR) and polyurethane urea elastomers which under particularly demanding applications show unique combinations of processing characteristics, hydrolysis and oxidation stability, mechanical and dynamic mechanical properties.

Abstract: The invention provides a process for producing diol, characterized in that the process comprises the steps of (1-i) addition of alkylene oxide and carbon dioxide to an H-functional starter substance in the presence of a catalyst to obtain polyether carbonate polyol and cyclic carbonate, (1-ii) separation of the cyclic carbonate from the resulting reaction mixture from step (1-i), (1-iii) hydrolytic cleavage of the cyclic carbonate separated from step (1-ii) into carbon dioxide and diol, (1-iv) optionally distillative purification of the diol from step (1-iii), wherein (?) to the cyclic carbonate from step (1-ii) and/or to the diol a Lewis or Brønsted acid, excluding carboxylic acids having a pKa of >3.0, and optionally water are added and the reaction mixture obtained is optionally neutralized.

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: 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 process for the production of flexible polyurethane foams, wherein there is used as starting material a polyester polyol component which is composed of at least two dicarboxylic acids.

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 invention relates to novel catalysts and the use thereof, for example in the preparation of polyisocyanate polyaddition products.

Abstract: Polyurethanes are produced using 2,2?-thiodiethanol as the chain lengthener. These polyurethanes are useful for the production of cast elastomers.