摘要:
The present invention relates to a process for the production of molding compositions, which can easily be released from the mold. These molding compositions comprise thermoplastic polyurethanes with a hardness of 45 to 65 Shore A, with good mechanical properties, with low shrinkage and good low temperature properties.
摘要:
Process for the continuous preparation of thermoplastically processable polyurethane elastomers with improved softening properties is disclosed. The process is carried out in a tubular reactor at a ratio of the circumferential speed of the stirrer (in m/sec) in the tubular reactor and the throughput (in g/sec) of >0.03 m/g.
摘要:
A process for the continuous preparation of melt processable polyurethane elastomers having improved softening behavior is disclosed. The process entails reacting a polyisocyanate, a polyol and a chain extender, which have a temperature of at least 170° C., in a static mixer, wherein the reaction mixture is prepared. The reaction mixture is then metered into an extruder into which optional auxiliaries and/or further components are fed.
摘要:
A moulded article comprising thermoplastic polyurethane (TPU) that exhibits reduced fogging is disclosed. Characterized in having condensate value of
摘要:
Thermoplastic polyurethanes (TPU) with a low tendency towards surface tackiness of the granules are prepared by applying at least one wetting agent satisfying specified criteria and at least one solid powdering agent to the TPU before and/or after comminution of the TPU.