公开(公告)号：US20220163162A1

公开(公告)日：2022-05-26

申请号：US17600180

申请日：2020-03-31

Applicant: BASF SE

Inventor： Gianpaolo Tomasi ,  Roman Laubgan ,  Alex Popov ,  Carsten Ellersiek ,  Christof Grieser-Schmitz

IPC: F16L59/02 ,  F16L59/04

Abstract: Described herein is a process for producing a pipe insulated with polyurethane foam, where (a) isocyanates are mixed with (b) polyols, (c) blowing agent including at least one aliphatic, halogenated hydrocarbon compound (c1), made up of from 2 to 5 carbon atoms, at least one hydrogen atom and at least one fluorine and/or chlorine atom, where the compound (c1) includes at least one carbon-carbon double bond, (d) catalyst including N,N-dialkylbenzylamine, optionally (e) chain extenders and/or crosslinkers and optionally (f) auxiliaries and additives to give a reaction mixture, the reaction mixture is applied to a pipe for media and is allowed to cure to give the polyurethane foam. Also described herein is an insulated pipe obtained by such a process and a method of using such an insulated pipe as insulated composite wall pipe for district heating or district cooling networks laid in the ground.

公开(公告)号：US11982395B2

公开(公告)日：2024-05-14

申请号：US17600180

申请日：2020-03-31

Applicant: BASF SE

Inventor： Gianpaolo Tomasi ,  Roman Laubgan ,  Alex Popov ,  Carsten Ellersiek ,  Christof Grieser-Schmitz

IPC: F16L59/02 ,  F16L59/04

CPC classification number: F16L59/028 ,  F16L59/04

Abstract: Described herein is a process for producing a pipe insulated with polyurethane foam, where (a) isocyanates are mixed with (b) polyols, (c) blowing agent including at least one aliphatic, halogenated hydrocarbon compound (c1), made up of from 2 to 5 carbon atoms, at least one hydrogen atom and at least one fluorine and/or chlorine atom, where the compound (c1) includes at least one carbon-carbon double bond, (d) catalyst including N,N-dialkylbenzylamine, optionally (e) chain extenders and/or crosslinkers and optionally (f) auxiliaries and additives to give a reaction mixture, the reaction mixture is applied to a pipe for media and is allowed to cure to give the polyurethane foam. Also described herein is an insulated pipe obtained by such a process and a method of using such an insulated pipe as insulated composite wall pipe for district heating or district cooling networks laid in the ground.