Process for patching canals and ditches with a non-sagging...

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 18/32 (2006.01) C08G 18/48 (2006.01) C08G 18/66 (2006.01) C09J 175/12 (2006.01)

Patent

CA 2440883

Seams are sealed and surface defects are repaired in a polyurethane/geotextile composite applied over concrete, an earthen canal or a ditch with a non- sagging polyurethane composition. This non-sagging polyurethane composition is a reaction product of a polyisocyanate, a high molecular weight polyhydroxyl compound, and a compound containing at least two amino groups. A low molecular weight diol or triol, a catalyst and a filler are optionally included in the polyurethane-forming reaction mixture.

L'invention concerne une composition polyuréthanne qui ne s'affaisse pas, permettant de combler des fissures de manière étanche et de réparer des défauts de surface dans un matériau composite polyuréthanne/géotextile appliqué sur du béton, dans un canal ou dans une rigole de drainage en terre. Ladite composition polyuréthanne qui ne s'affaisse pas est un produit de réaction d'un polyisocyanate, d'un composé polyhydroxyle de poids moléculaire élevé, et d'un composé contenant au moins deux groupes amino. Un diol ou un triol de faible poids moléculaire, un catalyseur et une charge sont éventuellement compris dans le mélange de réaction destiné à la formation de polyuréthanne.

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