An improved process for intensifying the surface...

C - Chemistry – Metallurgy – 09 – K

Patent

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C09K 17/20 (2006.01) C09K 17/22 (2006.01)

Patent

CA 2240978

The invention relates to a process for intensifying the surface stabilization of soil susceptible to erosion by introduction of water-based adhesion-promoting impregnating compounds based on esters of polyvinyl alcohol with C1-5 monocarboxylic acids and mixtures thereof with higher monocarboxylic acids (binders) using surface-active and biologiclly compatible wetting agents. The process is characterized in that impregnation of the soil is carried out in several stages and in that an aqueous preparation containing the wetting agents is used at least in the first impregnating stage. Binder is preferably used in a comparatively small quantity in this pre-impregnation stage.

L'invention concerne un procédé pour intensifier la consolidation de la couche superficielle de sols menacés par l'érosion par application de matières d'imprégnation à base d'eau et promoteurs d'adhérence à base d'esters de polyvinylalcool avec des acides monocarboxyliques C1-5 et leurs mélanges contenant des acides monocarboxyliques supérieurs (liants) en utilisant des mouillants tensioactifs et biologiquement tolérables. Le procédé est caractérisé en ce que l'imprégnation du sol est réalisée en plusieurs étapes et en ce qu'une préparation aqueuse contenant le mouillant est utilisée pendant au moins la première étape d'imprégnation du sol. Au cours de cette étape de préimprégnation, on utilise de préférence des liants en quantités relativement faibles.

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