| abstract |
The present invention relates to a process for the preparation of pipelines having heat-storing properties comprising a) organic polyisocyanate with b) at least one polymeric compound having at least two isocyanate-reactive hydrogen atoms, c) optionally chain extenders and / or crosslinking agents, d) catalyst, e ) Wax and f) optionally other auxiliaries and / or additives, mixed into a first reaction mixture, the first reaction mixture is applied to a tube and allowed to react to a first polyurethane layer. Furthermore, the present invention relates to a pipeline with heat-storing properties obtainable by such a method. |