Abstract:
The invention relates to a method for producing polyurethane molded foam bodies, wherein a) organic polyisocyanates are mixed with b) polyols, containing b1) polyesterols and b2) polymer polyetherols having a fraction of primary OH groups of less than 50%, c) expanding agents, and optionally d) chain lengthening agents and/or cross-linking agents, e) catalysts and f) other auxiliary agents and/or additives, to form a reaction mixture, introduced in a mold and allowed to fully cure to form a polyurethane molded foam body. The invention further relates to the use of polymer polyetherols and polymer polyesterols for producing polyurethane molded foam bodies and to the use of such polyurethane molded foam bodies as a shoe sole.
Abstract:
The invention provides a thermoplastic polyurethane having at least one plasticizer, with at least one first plasticizer (i) being based on a glycerol, and at least one hydroxyl group of the glycerol being esterified with a monocarboxylic acid (ii) which contains 1, 2, 3, 4, 5 or 6 carbon atoms, more preferably 2, 3 or 4 carbon atoms and very preferably 2 carbon atoms. The invention further encompasses a process for preparing the thermoplastic polyurethane having the plasticizer (i), a method for coating products with this thermoplastic polyurethane, the use of the thermoplastic polyurethane, and the use of plasticizers based on glycerol for thermoplastic polyurethane.
Abstract:
A multilayer composition for packaging comprising a first polymer film, a second film, at least one print layer between the films and a 1 K isocyanate prepolymer adhesive layer between the at least one print layer and one of the films, where the print layer contains a hyperbranched polyester binder containing functional groups selected from the group consisting of —OH, —COOH and —COOR, where R is methyl, ethyl, vinyl, isopropyl, n-propyl, n-butyl, isobutyl, sec-butyl or tert-butyl provides packaging laminates with excellent adhesion. The hyperbranched polyester is for example a polymer of trimethyolpropane and hexahydrophthalic anhydride and optionally a cycloaliphatic diol.
Abstract:
processo de preparação de poliuretano, poliuretano e usos de um composto e de poliuretano. a presente invenção refere-se a um processo de preparação de poliuretano, que compreende a reação de uma composição (z1) que compreende pelo menos um composto (p1) reativo a isocianatos e uma composição (z2) que compreende pelo menos um póli-isocianato, em que o composto (p1) pode ser obtido ou foi obtido por meio da reação de pelo menos um poliepóxido com um composto (v1) selecionado a partir do grupo que consiste de polieteraminas e polieteróis. a presente invenção refere-se ainda a poliuretanos que podem ser obtidos ou são obtidos por meio desse processo e ao uso de um poliuretano de acordo com a presente invenção para revestimento de tubulações, como junção de campo ou de equipamento submarino, como árvores de natal, para o setor offshore, e como poliuretano sintático de vidro.
Abstract:
The invention relates to a method for producing a hard foam, comprising the following steps: at least one polyisocyanate is reacted with a mixture containing at least one polyepoxide, water and at least one additional hydrogen azide compound, said reaction taking place in the presence of a metal-free Lewis base with at least one nitrogen atom, hard foams obtained according to said type of method, and to the use of the claimed hard foam for producing insulating materials, vacuum insulation panels, cooling devices, components, wind rotor blades or elements boat and vehicle construction.
Abstract:
The invention relates to a method for producing polyurethane-coated line elements and the use thereof preferably in maritime environments. In said method, (a) a mixture of aromatic and aliphatic polyisocyanate is mixed with (b) at least one polymer compound having at least two isocyanate-reactive hydrogen atoms, (c) chain extending agents having a functionality of 2 to 4 and a hydroxyl number of 500 to 2500 mg KOH/g, (d) catalyst, and (e) optionally, other auxiliary agents and/or additives, to obtain a reaction mixture, and the reaction mixture is directly or indirectly applied to a suitable substrate and is allowed to finish reacting to obtain a polyurethane layer, the chain extender characteristic KV of isocyanates (a) and of all isocyanate-reactive compounds of components (b) to (e) according to formula (1) being 1 to 100, where M(aromat. Isocyanat) is the weight ratio (in wt%) of the aromatic isocyanate in relation to the sum of the total weight of the isocyanate used and isocyanate-reactive compounds of components (b) to (e), NCO(aromat.Isocyanat) is the NCO content (in wt%) of the aromatic isocyanate, and M(Kettenverlängerer) is the weight ratio (in wt%) of the chain extender in relation to the sum of the total weight of the isocyanate used and the isocyanate-reactive compounds in components (b) to (e). The invention further relates to line elements obtainable according to a method of this kind.
Abstract:
The invention relates to a method for producing polyurethane-coated line elements, in which (a) aliphatic polyisocyanate is mixed with (b) compounds containing at least two isocyanate-reactive hydrogen atoms, (c) catalyst, and (d) optionally, other auxiliary agents and/or additives, to obtain a first reaction mixture, and said reaction mixture is directly or indirectly applied to a tube and is allowed to finish reacting to obtain a polyurethane layer, wherein the compound containing at least two isocyanate-reactive hydrogen atoms contains a compound that is based on an alkoxylation product of an aromatic starter molecule. The invention further relates to line elements obtainable according to a method of this kind.