Reactive extrusion of tailored liquid polymers (tlps)

Details Reactive extrusion of tailored liquid polymers (tlps) Reactive extrusion of tailored liquid polymers (tlps)

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) C08G 18/08 (2006.01) C08G 18/67 (2006.01)

Patent

CA 2303381

The present invention is a process for preparing polyurethane polymers by extruding a free flowing liquid polyurethane (TLP). A TLP is prepared from a polyisocyanate and a polyol at low temperature. Elastomeric polyurethane polymers can be obtained from the TLP by a reactive extrusion process. Elastomeric polyurethane polymers thus obtained can be re-processed as a melt (melt processed) a number of times, and the polymer formed into various useful forms.

L'invention concerne un procédé servant à préparer des polymères de polyuréthanne par extrusion d'un polyuréthanne liquide coulant (TLP). On prépare ce TLP à partir d'un polyisocyanate et d'un polyol à basse température. On peut produire des polymères de polyuréthanne élastomères à partir du TLP au moyen d'un processus d'extrusion réactive. On peut réitérer le traitement de ces polymères de polyuréthanne élastomères obtenus, un certain nombre de fois sous forme de fusion (traitement en fusion) et on peut ensuite façonner le polymère en différentes formes utiles.

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