| abstract |
Method for the discontinuous production of insulated pipes, comprising the steps: 1) providing medium pipe and jacket pipe, wherein the medium pipe is arranged inside the jacket pipe, 2) preparation of a polyisocyanurate foam by reacting an isocyanate component (a) with a polyol mixture (b) between the medium pipe and the jacket pipe, characterized in that the polyol mixture (b) contains no polyester alcohols and a viscosity of less than 1300 mPas, measured according to DIN 53019 at 20 ° C having. |