公开(公告)号：CA3135242A1

公开(公告)日：2020-10-08

申请号：CA3135242

申请日：2020-03-31

Applicant: BASF SE

Inventor： TOMASI GIANPAOLO ,  LAUBGAN ROMAN ,  POPOV ALEX ,  ELLERSIEK CARSTEN ,  GRIESER-SCHMITZ CHRISTOF

IPC: C08G18/18 ,  B29C44/02 ,  C08G18/02 ,  C08G18/09 ,  C08G18/16 ,  C08G18/20 ,  C08G18/22 ,  C08G18/40 ,  C08G18/42 ,  C08G18/48 ,  C08G18/50 ,  C08G18/76 ,  C08J9/00 ,  C08J9/14 ,  F16L59/14

Abstract: The invention relates to a method for producing a pipe which is insulated using polyurethane foam, wherein (a) isocyanates are mixed with (b) polyols, (c) foaming agents containing at least one aliphatic halogenated hydrocarbon compound (c1) made of 2 to 5 carbon atoms, at least one hydrogen atom, and at least one fluorine and/or chlorine atom, said compound (c1) containing at least one carbon-carbon double bond, (d) a catalyst containing N,N-dialkylbenzylamine, optionally (e) chain-extending and/or cross-linking agents, and optionally (f) auxiliary agents and additives in order to form a reaction mixture, and the reaction mixture is applied onto a medium pipe and is allowed to harden in order to form the polyurethane foam. The invention additionally relates to an insulated pipe which can be obtained using such a method and to the use of such an insulated pipe as an insulated jacket compound pipe for underground long-distance heating or cooling grids.