C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/66 (2006.01) B29C 44/12 (2006.01) F16L 59/14 (2006.01)
Patent
CA 2680067
A method for the discontinuous production of insulated pipes, comprising the steps: 1) preparing the medium pipe and jacket pipe, wherein the medium pipe is located within the outer pipe, 2) producing a polyisocyanurate foam by reacting an isocyanate component (a) with a polyol mixture (b) between the medium pipe and the outer pipe, characterized in that the polyol mixture (b) comprises no polyester alcohols and has a viscosity of less than 1300 mPas, measured according to DIN 53019 at 20°C.
La présente invention concerne un procédé de réalisation discontinue de tubes isolés, comprenant les opérations suivantes : 1) mise à disposition d'un tube à substance et d'un tube enveloppe, le tube à substance se trouvant à l'intérieur du tube enveloppe; 2) production d'une matière de polyisocyanurate expansée par conversion d'une composante isocyanate (a) avec un mélange de polyols (b) entre le tube à substance et le tube enveloppe. L'invention se caractérise en ce que le mélange de polyols (b) ne contient aucun alcool de polyester et a une viscosité inférieure à 1300 mPas, mesurée selon la norme DIN 53019 à 20°C.
Grieser-Schmitz Christof
Lindemann Wilhelm
Basf Se
Robic
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