| 摘要 |
The present invention relates to a process for producing insulated pipes, the use of a polyurethane system comprising an isocyanate component (a), a polyol mixture (b) and at least one catalyst for producing insulated pipes, wherein the cream time for the polyurethane system is less than the time for introduction of the polyurethane system into the pipe, the use of specific amines as catalyst in a polyurethane system for producing insulated pipes and also an insulated pipe which can be obtained by the process of the invention. |
