Abstract:
The invention refers to a thermoplastic polyurethane produced from at least an organic diisocyanate and a compound which is reactive toward isocyanates, wherein the polyurethane comprises the ester of a tricarboxylic acid with at least one alcohol and wherein all acid groups of the tricarboxylic acid are esterified with an alcohol. The invention further refers to a process for producing the respective polyurethane, products comprising this thermoplastic polyurethane and the use of the ester of a tricarboxylic acid as plasticizer in thermoplastic polyurethanes.
Abstract:
Valve for an inflatable flexible tube section comprising a tubular shaft, and also a valve base, connected adhesively and around the entire periphery to an end of the shaft, wherein the valve base has been manufactured from a thermoplastic polyurethane.
Abstract:
A thermoplastic polyurethane foamed article has a plurality of bubbles distributed throughout the thermoplastic polyurethane foamed article and comprises a thermoplastic polyurethane composition and an epoxy-functional styrene acrylic copolymer which are foamed in the presence of a blowing agent. The epoxy-functional styrene acrylic copolymer is present in an amount ranging from 0.1 to 5% of the total combined weight of the thermoplastic polyurethane composition and the epoxy-functional styrene acrylic copolymer. The thermoplastic polyurethane foamed article has an average diameter of the plurality of bubbles ranging from 50 to 120 μm with at least 75% of the plurality of bubbles having a diameter of less than 200 μm.
Abstract:
A process for purifying a polycarbodiimide comprising (a) providing a mixture comprising a polycarbodiimide and a carbodiimidization catalyst; (b) separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture according to (a) to a first distillation, (c) adding an entrainer to the first bottom product obtained from (b) to obtain a mixture; (d) further separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture obtained from (c) to a second distillation.
Abstract:
A thermoplastic polyurethane foamed article has a plurality of bubbles distributed throughout the thermoplastic polyurethane foamed article and comprises a thermoplastic polyurethane composition and an epoxy-functional styrene acrylic copolymer which are foamed in the presence of a blowing agent. The epoxy-functional styrene acrylic copolymer is present in an amount ranging from 0.1 to 5% of the total combined weight of the thermoplastic polyurethane composition and the epoxy-functional styrene acrylic copolymer. The thermoplastic polyurethane foamed article has an average diameter of the plurality of bubbles ranging from 50 to 120 μm with at least 75% of the plurality of bubbles having a diameter of less than 200 μm.
Abstract:
A process for purifying a polycarbodiimide comprising (a) providing a mixture comprising a polycarbodiimide and a carbodiimidization catalyst; (b) separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture according to (a) to a first distillation, (c) adding an entrainer to the first bottom product obtained from (b) to obtain a mixture; (d) further separating carbodiimidization catalyst from the polycarbodiimide by subjecting the mixture obtained from (c) to a second distillation.
Abstract:
The invention relates to an interception device for moving articles or persons based on thermoplastic polyurethane which is obtained via the reaction in each case of at least one of the following starting materials: (a) diisocyanate, (b) compound which is reactive toward isocyanate and which has a number-average molar mass (Mw) of from 0.500×103 g/mol to 10×103 g/mol, (c) chain extender which has a molar mass of from 50 g/mol to 499 g/mol, and also optionally (d) with use of catalyst, of conventional auxiliaries and/or (f) of additives, where the interception device comprises a foil or a network made of the thermoplastic polyurethane and retention devices between which the foil or the network has been stretched flat, and the thermoplastic polyurethane is transparent. The invention further relates to the use of thermoplastic urethane for producing interception devices, and to a production process for an interception device made of thermoplastic polyurethane.
Abstract translation:本发明涉及一种用于基于热塑性聚氨酯移动物品或人的拦截装置,所述拦截装置在每种情况下通过以下至少一种以下起始材料获得:(a)二异氰酸酯,(b)对异氰酸酯具有反应性的化合物和 其数均摩尔质量(Mw)为0.500×10 3 g / mol至10×10 3 g / mol,(c)摩尔质量为50g / mol至499g / mol的扩链剂,以及 还可任选地(d)使用常规助剂和/或(f)添加剂的催化剂,其中拦截装置包括箔或由热塑性聚氨酯制成的网络和保持装置,箔或网络已被拉伸 平坦,热塑性聚氨酯是透明的。 本发明还涉及热塑性聚氨酯用于制造拦截装置的用途以及由热塑性聚氨酯制成的拦截装置的生产方法。